CN112297538B

CN112297538B - Ceramic-like shell, preparation method thereof and electronic equipment

Info

Publication number: CN112297538B
Application number: CN202011176300.7A
Authority: CN
Inventors: 潘旋
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2023-05-26
Anticipated expiration: 2040-10-28
Also published as: CN112297538A

Abstract

The application provides an imitative ceramic shell, including non-ceramic substrate, printing ink layer, liquid glass layer and the optical film layer of range upon range of setting in proper order. The base color of the ceramic appearance is realized by arranging the ink layer, the glaze texture of the ceramic appearance is realized by the optical film layer, the combination performance of the liquid glass layer, the ink layer and the optical film layer is excellent, the overall service performance is improved, and the ceramic-like shell can be widely applied to electronic equipment. Meanwhile, the preparation method of the ceramic-like shell is simple, the production efficiency is high, the preparation yield is excellent, and the preparation cost is low. The ceramic-like shell can be widely applied to electronic equipment, so that the electronic equipment realizes the appearance of ceramic texture, and the product competitiveness is improved.

Description

Ceramic-like shell, preparation method thereof and electronic equipment

Technical Field

The application belongs to the technical field of electronic products, and particularly relates to a ceramic-like shell, a preparation method thereof and electronic equipment.

Background

Ceramics are popular with consumers because of their warmth and smoothness, and have been increasingly used in electronic devices in recent years. At present, when ceramic materials are directly adopted to prepare products, the yield and the productivity are not high, and the use of ceramic parts in electronic equipment is limited.

Disclosure of Invention

In view of the above, the application provides a ceramic-like shell with ceramic texture, which has good ceramic appearance effect, simple preparation method, excellent production efficiency and yield, and is favorable for wide use in electronic equipment.

In a first aspect, the present application provides a ceramic-like housing comprising a non-ceramic substrate, an ink layer, a liquid glass layer, and an optical film layer, laminated in sequence.

In a second aspect, the present application provides a method for preparing a ceramic-like shell, comprising:

and forming an ink layer, a liquid glass layer and an optical film layer on the non-ceramic substrate in sequence to obtain the ceramic-like shell.

In a third aspect, the application provides an electronic device, including imitative ceramic shell and mainboard, imitative ceramic shell is including non-ceramic substrate, printing ink layer, liquid glass layer and the optical film layer of lamination setting in proper order.

The application provides the ceramic-like shell, wherein the ink layer can realize the ground color of the ceramic appearance, the optical film layer can realize the enamel sense of the ceramic appearance, the combination property of the liquid glass layer, the ink layer and the optical film layer is excellent, the overall use performance is improved, and the ceramic-like shell is widely applied to electronic equipment; the ceramic-like shell can realize ceramic texture without using ceramic materials, and the application field of non-ceramic base materials is expanded. Meanwhile, the preparation method of the ceramic-like shell is simple, high in production efficiency, excellent in preparation yield and low in preparation cost. The ceramic-like shell can be widely applied to electronic equipment, so that the electronic equipment can realize the appearance of ceramic texture, and the product competitiveness is improved.

Drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

Fig. 1 is a schematic structural diagram of a ceramic-like shell according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a ceramic-like shell according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a ceramic-like shell according to an embodiment of the present disclosure.

Fig. 4 is a schematic flow chart of a method for manufacturing a ceramic-like shell according to an embodiment of the present application.

Description of the reference numerals:

the ceramic-like composite substrate comprises a non-ceramic substrate 10, an outer surface 101, an inner surface 102, an ink layer 20, a liquid glass layer 30, an optical film layer 40, a functional layer 50 and a ceramic-like shell 100.

Detailed Description

The following are preferred embodiments of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be within the scope of the present application.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

Referring to fig. 1, a schematic structural diagram of a ceramic-like housing according to an embodiment of the present application is shown, and a ceramic-like housing 100 includes a non-ceramic substrate 10, an ink layer 20, a liquid glass layer 30 and an optical film layer 40 stacked in order. In the application, the ground color of the ceramic appearance is realized by arranging the ink layer 20, the enamel sense of the ceramic appearance is realized by arranging the optical film layer 40, and the ink layer 20 is close to the non-ceramic substrate 10 and serves as a bottom layer, and the optical film layer 40 is far away from the non-ceramic substrate 10 and serves as a surface layer, so that the appearance effect of the ceramic enamel sense can be better realized; meanwhile, the liquid glass layer 30, the ink layer 20 and the optical film layer 40 are excellent in combination performance, so that the overall service performance is improved, and the ceramic-like shell 100 is widely applied to electronic equipment; in addition, the ceramic-like shell 100 can realize ceramic texture without using ceramic materials, and expands the application field of the non-ceramic base material 10.

In the related art, when only the ink layer 20 is adopted, the surface reflectivity of the ink layer 20 is lower, the texture of plastic is presented, the ceramic texture cannot be achieved, even if the optical film layer 40 is adopted for priming, the visual effect of the ceramic glaze texture cannot be achieved, rainbow patterns can be generated when the surface of the ink layer 20 is uneven, and the presentation of the ceramic texture is more unfavorable; when the optical film layer 40 is used as a surface layer and the ink layer 20 is used as a bottom layer, the bonding performance between the optical film layer 40 and the ink layer 20 is poor, and abrasion and falling easily occur during use, so that the service performance of a product is affected. This application is through adopting optical film layer 40 as the surface, its reflectivity is close with the reflectivity of pottery, can realize the enamel sense of pottery, adopt printing ink layer 20 as the priming layer simultaneously, realize ceramic ground color, still set up liquid glass layer 30, promote overall structure's bonding performance, and printing ink layer 20, liquid glass layer 30 and optical film layer 40 range upon range of setting in proper order on non-ceramic substrate 10, can enough avoid the appearance of rainbow line, bonding performance is excellent between each layer simultaneously, add printing ink layer 20 on non-ceramic substrate 10 surface, liquid glass layer 30 and optical film layer 40 after, each layer synergism has realized imitative ceramic outward appearance effect, promote the range of application.

In the application, the non-ceramic substrate 10 is matched with other structures, so that ceramic texture is realized, and the application range of the non-ceramic substrate 10 is increased. The material of the non-ceramic substrate 10 may be, but is not limited to, any known material that may be used in the housing of an electronic device. In the present embodiment, the material of the non-ceramic substrate 10 includes at least one of glass, metal and plastic. The non-ceramic substrate 10 not only can realize the appearance of ceramic, but also maintains the performance of the original material, and is more beneficial to application. Specifically, the non-ceramic substrate 10 may have a single-layer structure, may have a multi-layer structure, and may specifically be a single-layer plastic layer, a multi-layer plastic composite layer, a glass plate, or the like. In one embodiment of the present application, the material of the non-ceramic substrate 10 includes plastic, and the plastic includes at least one of polycarbonate, polymethyl methacrylate, polyethylene terephthalate, polyethylene, polypropylene, and thermoplastic polyurethane. In particular, the non-ceramic substrate 10 may be formed, but is not limited to, a polymethyl methacrylate layer and a polycarbonate layer stacked. In another embodiment of the present application, the material of the non-ceramic substrate 10 comprises glass. In particular, the non-ceramic substrate 10 may be, but is not limited to, a strengthened glass, which enhances the mechanical properties of the non-ceramic substrate 10. In yet another embodiment of the present application, the material of the non-ceramic substrate 10 comprises a metal. In one embodiment, the non-ceramic substrate 10 is a metal shell with a gap formed therein, and the gap is filled with an electrically insulating material. Because the metal has shielding effect on signals, the communication effect is ensured by arranging an electrically insulating gap on the metal shell. In particular, the electrically insulating material may be, but is not limited to, at least one of plastic, glass. In the present application, the thickness of the non-ceramic substrate 10 is not particularly limited. In the present embodiment, the thickness of the non-ceramic substrate 10 is 0.1mm to 1mm. Specifically, the thickness of the non-ceramic substrate 10 may be, but is not limited to, 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.75mm, 0.8mm, 0.9mm, etc., to meet the impact resistance requirements, and not too thick to meet the light and thin requirements. In another embodiment of the present application, the non-ceramic substrate 10 may be of equal thickness, or of graded thickness, to achieve different appearance effects. In the present application, the specific shape and size of the non-ceramic substrate 10 are not limited, and may be selected and designed according to practical needs, for example, the non-ceramic substrate 10 is in the shape of a rear case and/or a middle frame of an electronic device, such as a 2D shape, a 2.5D shape, a 3D shape, and the like.

In this application, the ink layer 20 provides a ceramic feel ground tint to the simulated ceramic shell 100. The ink layer 20 is a color ink layer, and the color of the ink layer 20 may be, but is not limited to, white, blue, cyan, yellow, red, etc.; or can splice or gradually change the colors to form the ceramic-like effect of color bumping. In an embodiment, by setting inks with different colors in different areas, an ink layer 20 with color bumping is obtained, for example, the ink layer 20 has a first area and a second area with color difference greater than 4, so that the color bumping effect is better achieved, the further first area can be patterned, and the appearance effect is improved.

In the present embodiment, the ink layer 20 may be formed by applying ink and curing the ink layer 20, such as by spraying or silk-screening color ink. Optionally, curing includes baking at 50-80 ℃ for 20-100 min. Further, curing includes baking at 60-75 ℃ for 30-80 min. In this application, the ink includes an organic polymer, a film-forming material, and a pigment; the hardness and reflectance of the ink layer 20 formed after curing are not high. In one embodiment of the present application, the hardness H of the ink layer 20 ₁ Not more than 3H. Specifically, hardness H of ink layer 20 ₁ May be, but is not limited to, not greater than 1.5H, 1.8H, 2H, or 2.5H. In the application, the hardness is measured by GBT6739-1996 pencil test method for coating hardness, pencils (0H-9H) with different hardness and (1 kg) under the same load are used for measuring, and the hardness of the film layer is indirectly judged according to the scratch degree of the surface of the film layer. In the related art, when the ink layer 20 is used as a surface layer, the ink layer 20 has small hardness and poor abrasion resistance, and is easily appliedScratch and drop, which is unfavorable for application. The reflectivity of the ceramic product generally reaches more than 10%, the reflectivity of the ink layer 20 is far lower than 10%, and when the ink layer 20 is used as a surface layer, the enamel feel of the ceramic cannot be achieved, and the plastic texture is serious. In one embodiment of the present application, the reflectivity R of the ink layer 20 ₁ Not more than 5%. Further, the reflectivity R of the ink layer 20 ₁ 2%, 3%, 4% or 5%. In the present application, a reflectance meter is used to detect the reflectance of the film.

In the present application, the thickness of the ink layer 20 is not particularly limited. In the present embodiment, the thickness of the ink layer 20 is 35 μm to 50 μm. Further, the thickness of the ink layer 20 is 38 μm to 48 μm. Further, the thickness of the ink layer 20 is 40 μm to 45 μm. Specifically, the thickness of the ink layer 20 may be, but is not limited to, 35 μm, 42 μm, 45 μm, 47 μm, 49 μm, etc. The ink layer 20 in this range can make the ceramic-like shell 100 have a better ceramic-like base color, and at the same time, the thickness of the ceramic-like shell 100 is not excessively increased, which is beneficial to the lightening and thinning of the whole structure. In embodiments of the present application, the ink layer 20 may include a plurality of sub-ink layers; the specific number, thickness, materials and color of the sub-ink layers can be selected and adjusted according to actual needs. In particular, the number of sub-ink layers may be, but is not limited to, 2, 3, 4, 5, or 6. In one embodiment, the thickness of the sub-ink layer may be, but is not limited to, 5 μm to 25 μm. In another embodiment, the optical transmittance of at least one layer of the plurality of sub-inks is less than 50%, so that the transmittance of the ink layer 20 is reduced, and the ceramic-like ground color is better presented, and the ceramic texture is more similar. Further, the optical transmittance of the ink layer 20 is smaller than 10%, so that a color effect which is closer to the texture of ceramic can be achieved, meanwhile, when the non-ceramic substrate 10 has a color appearance effect, the non-ceramic substrate 10 can be shielded, the influence on the appearance of the ceramic-like effect is avoided, in addition, in the application process of the electronic equipment, the components inside the electronic equipment can be shielded, and the influence on the appearance effect is avoided. In one embodiment, the ink layer 20 includes a first sub-ink layer, a second sub-ink layer, and a third sub-ink layer that are stacked, wherein the first sub-ink layer is disposed on the surface of the non-ceramic substrate 10.

In this application, the liquid glass layer 30 is formed by coating liquid glass (liquid glass) and curing the liquid glass, the liquid glass comprises silicon dioxide and solvent, the solvent can be but not limited to water, ethanol and the like, the liquid glass is liquid at room temperature, has better fluidity, the solvent is in a glass state after volatilization, has high hardness and high light transmittance, the liquid glass can be carried out at room temperature or can be in a heating state, the optional curing comprises baking at 20-80 ℃ for 10-60 min, the further curing comprises baking at 30-70 ℃ for 15-45 min, in the embodiment of the application, the material of the liquid glass layer 30 comprises silicon dioxide, in one embodiment, the silicon dioxide in the liquid glass layer 30 is nano-sized particles, the optional silicon dioxide has the particle size smaller than 20nm, the silicon dioxide has the particle size smaller than 15nm, thereby being favorable for the dispersion of the silicon dioxide in the liquid glass, and simultaneously improving the light transmittance of the liquid glass layer 30 after molding, the specific silicon dioxide particle size can be but not limited to 3nm, 5nm, 8nm, 10nm, 16nm, 18nm or 18nm, and a small amount of the liquid glass layer 30 is arranged in the liquid glass layer between the liquid glass layer 30 and the solvent layer 30, the ink layer 30 is almost completely formed, the ink layer 30 is formed, the ink layer is almost between the liquid glass layer and the liquid glass layer is formed, and the ink layer 30 is almost completely formed in the layer is formed in the liquid glass layer, and the solvent layer is a layer between the solvent layer 30, and the ink layer is formed in the liquid glass layer is a layer between the layer and a layer 30 layer is formed; meanwhile, chemical bonds are generated between substances in the liquid glass layer 30 and substances in the optical film layer 40, so that the bonding force between the liquid glass layer 30 and the optical film layer 40 is improved, and when the ink layer 20 and the optical film layer 40 are directly laminated, only van der Waals force exists between the ink layer 20 and the optical film layer 40, the bonding force is weak, the ink layer is easy to fall off, and the overall performance is affected; the bonding force of the ink layer 20 and the optical film layer 40 is improved through the arrangement of the liquid glass layer 30, the overall wear resistance and corrosion resistance are improved, meanwhile, the liquid glass layer 30 is good in light transmittance, the appearance effect of the ink layer 20 and the optical film layer 40 cannot be influenced, and the ceramic-like appearance is formed.

In the present embodiment, the thickness of the liquid glass layer 30 is less than or equal to 5 μm. Further, the thickness of the liquid glass layer 30 is 2 μm to 4 μm, and further, the thickness of the liquid glass layer 30 is 2 μm to 3 μm. Specifically, the thickness of the liquid glass layer 30 may be, but is not limited to, 1.5 μm, 1.8 μm, 2 μm, 2.3 μm, 2.5 μm, 3 μm, 3.5 μm, or 4.5 μm. By providing the liquid glass layer 30 with a thinner thickness, the quality of the ceramic-like housing 100 is not increased, and the overall bonding performance can be improved. In the present application, the liquid glass layer 30 has high light transmittance. In the present embodiment, the optical transmittance of the liquid glass layer 30 is greater than 90%. Thereby avoiding the effect on the color rendering of the ink layer 20.

In the present embodiment, the hardness H of the liquid glass layer 30 ₂ Greater than 3H and less than 9H. Further, the hardness H of the liquid glass layer 30 ₂ 4H-6H. In particular, hardness H of liquid glass layer 30 ₂ May be, but is not limited to, 3.5H, 4H, 5H, 6H, 7H, 8H, or 9H. In the present embodiment, the reflectance R of the liquid glass layer 30 ₂ More than 5% and less than 10%. Further, the reflectance R of the liquid glass layer 30 ₂ 6% -9%. In particular, the reflectance R of the liquid glass layer 30 ₂ May be, but is not limited to, 5.5%, 6.5%, 7%, 8%, 8.5%, 9%, or 9.5%. In the present application, the reflectivity of the liquid glass layer 30 is close to that of the ceramic, so that the reflectivity similar to that of the ceramic can be still maintained when the optical film layer 40 falls off or breaks, thereby ensuring the ceramic glaze texture of the ceramic-like shell 100, and being more beneficial to the application thereof.

In this application, the optical film 40 is a layer of optical medium material that propagates light through its interface, and may alter the reflection, refraction, etc. of light passing through the optical film 40 to cause the ceramic-like housing 100 to exhibit a certain change in gloss. The reflectivity of the optical film layer 40 is changed by changing the material, thickness, layer number and the like of the optical film layer 40, so that different visual effects are realized, and the requirements under different scenes are met. In this application, the optical transmittance of the optical film layer 40 is greater than 80%, 85%, or 90% to avoid affecting the appearance of the base color of the ink layer 20.

In the present embodiment, the reflectivity R of the optical film 40 ₃ Greater than or equal to 10%. Thereby achieving a reflectivity similar or identical to that of the ceramic such that the ceramic-like shell 100 has a ceramic enamel feel. Further, R is more than or equal to 10 percent ₃ Less than or equal to 50 percent. Further, R is more than or equal to 10 percent ₃ Less than or equal to 15 percent, and is more similar to the reflectivity of ceramics, thereby being beneficial to the presentation of the ceramic-like effect. Specifically, the reflectivity R of the optical film 40 ₃ May be, but is not limited to, 10%, 11%, 12%, 13%, 14%, 15%, 20%, 25%, etc. In the present embodiment, the thickness of the optical film layer 40 is 100nm to 500nm, and specifically, but not limited to, 120nm, 130nm, 150nm, 180nm, 200nm, 300nm, etc., to achieve a reflectance of 10% or more.

In the present application, the optical film layer 40 may have a single-layer film structure or a multilayer film structure. When the optical film layer 40 is a multilayer film structure, the desired reflectivity can be achieved by controlling the material and thickness of each layer, as well as the fit between the layers. Alternatively, the optical film layer 40 is formed by alternately laminating at least two optical films having different refractive indexes. Further, the optical film layer 40 is formed by periodically alternately laminating at least two optical films having different refractive indexes. The materials and thicknesses of the plurality of optical films may be the same or different. The optical properties of the plurality of optical films are different. Specifically, the optical film layer 40 may include, but is not limited to, 2, 3, 4, 5, 6, 7, or 8 optical films.

In the present embodiment, the material of the optical film layer 40 may be inorganic or organic. In the present embodiment, the optical film layer 40 may be formed by, but not limited to, vapor deposition, such as physical vapor deposition or chemical vapor deposition, specifically, low pressure chemical vapor deposition, atmospheric pressure chemical vapor deposition, evaporation, sputtering, ion plating, etc., and the optical film layer 40 may be formed by coating. In one embodiment of the present application, the material of the optical film layer 40 includes an organic material, wherein the organic material includes at least one of polyether, polyester, fluoropolymer and silicon-containing polymer. When the material of the optical film 40 includes organic mattersWhen the optical film 40 is in use, the flexibility and the flexibility are good, the optical film 40 with the required size can be obtained by cutting, chemical bonds are generated between organic matters in the optical film 40 and organic matters in the liquid glass layer 30, and the binding force is improved. In another embodiment of the present application, the material of the optical film layer 40 includes an inorganic material, wherein the inorganic material includes at least one of an inorganic oxide and an inorganic fluoride. When the material of the optical film 40 includes an inorganic substance, a chemical bond is generated between the inorganic substance in the optical film 40 and the inorganic substance in the liquid glass layer 30, so as to improve the bonding force. Further, the inorganic substance includes SiO ₂ 、TiO ₂ 、Ti ₃ O ₅ 、NbO ₂ 、Nb ₂ O ₃ 、NbO、Nb ₂ O ₅ And ZrO(s) ₂ At least one of them. In one embodiment of the present application, the optical film layer 40 is formed by alternately laminating at least two films having different refractive indexes. Optionally, the optical film layer 40 comprises SiO ₂ Layer, tiO ₂ Layer of Ti ₃ O ₅ Layer, nbO ₂ Layer, nb ₂ O ₃ Layer, nbO layer, nb ₂ O ₅ Layer and ZrO ₂ At least two of the layers. In one embodiment, optical film 40 includes three layers of SiO ₂ Layer and three layers Nb ₂ O ₃ Layer of SiO ₂ Layer and Nb ₂ O ₃ The layers are alternately stacked.

It will be appreciated that the ceramic simulating shell 100 of the present application has, in use, an oppositely disposed outer surface 101 and inner surface 102. Referring to fig. 2, a schematic structural diagram of a ceramic-like housing according to another embodiment of the present application is shown, in which an ink layer 20, a liquid glass layer 30 and an optical film layer 40 are sequentially stacked on an outer surface 101 of a non-ceramic substrate 10. Thus, the outer surface 101 can be made to have a texture similar to that of ceramics, which is advantageous for application.

In the present embodiment, the hardness of the ink layer 20, the liquid glass layer 30, and the optical film layer 40 gradually increases. Compared with the direct contact between the ink layer 20 and the optical film layer 40, the two layers have overlarge direct hardness difference and unmatched hardness, and are easy to wear and fall off, and the laminated structure with hardness change is arrangedWhen the optical film layer 40 receives external mechanical force, the force can be transmitted to the liquid glass layer 30 and the ink layer 20, and the continuous change of the hardness is embodied as the continuous change of deformation in the process, so that abrupt deformation drop is avoided, and the wear resistance of the whole structure is further improved. In one embodiment of the present application, the ink layer 20 has a hardness of H ₁ The hardness of the liquid glass layer 30 is H ₂ The hardness of the optical film layer 40 is H ₃ Wherein H is ₁ ≤3H，3H＜H ₂ ＜9H，H ₃ And is more than or equal to 9H. The hardness between each layer gradually changes, and the hardness difference between two adjacent layers is smaller, when the external acting force is applied, no obvious drop is generated, and therefore the abrasion resistance and corrosion resistance are improved more favorably.

In the present embodiment, the reflectivity of the ink layer 20, the liquid glass layer 30, and the optical film layer 40 gradually increases. Through setting up the range upon range of structure that has reflectance and change, after optical film layer 40 receives wearing and tearing, liquid glass layer 30 can have the reflectance of approximate pottery, and the change of reflectance is in acceptable range, avoids directly presenting the reflectance of printing ink layer 20, causes the unable realization of imitative ceramic effect, and reflectance gradually changes simultaneously makes the light transmission process on the outward appearance effect more mild, and the gloss change is more natural, is favorable to the presentation of ceramic glaze feel. In one embodiment of the present application, the reflectivity of the ink layer 20 is R ₁ The liquid glass layer 30 has a reflectivity R ₂ The optical film 40 has a reflectivity R ₃ Wherein R is ₁ ≤5％，5％＜R ₂ ＜10％，R ₃ More than or equal to 10 percent. Further, the reflectivity of the optical film 40 is 10% -15%. The reflectivity between each layer gradually changes, and the reflectivity between two adjacent layers has smaller difference, and the reflectivity of the optical film layer 40 is similar or the same as that of the ceramic, so that the ceramic-like shell 100 has the enamel sense of the ceramic.

Referring to fig. 3, a schematic structural diagram of a ceramic-like shell according to another embodiment of the present application is substantially the same as that of fig. 1, and the functional layer 50 is further included, where the functional layer 50 may be, but is not limited to, a fingerprint-proof layer, an anti-glare layer, etc., to improve the service performance of the ceramic-like shell 100. In the embodiment of the present application, the optical transmittance of the functional layer 50 is more than 90% and the thickness is less than 50 μm. Through setting up the functional layer 50 of thinner thickness and high printing opacity to avoid the too much influence of functional layer 50 to optical film layer 40 reflectivity, be favorable to the realization of ceramic outward appearance effect, can promote the performance of imitative ceramic casing 100 again simultaneously.

In the present application, when the non-ceramic substrate 10 includes a metal substrate, since the metal has a shielding effect on signals, a slit is mainly formed on the metal substrate, and an insulating material is filled in the slit as an antenna micro; when the non-ceramic base material 10 is used alone as the case, since two materials are used and most of metals and insulating substances have a significant difference in color, a significant area is presented in appearance, which is disadvantageous for the presentation of the integration effect. In an embodiment of the present application, when the non-ceramic substrate 10 in the ceramic-like housing 100 provided by the present application includes a metal substrate, after the non-ceramic substrate 10 is provided with a gap and is filled with an insulating material, the ink layer 20, the liquid glass layer 30 and the optical film layer 40 are laminated to present a ceramic color texture, so as to shield the insulating material, thereby improving the appearance effect and being more beneficial to the application thereof.

In the present embodiment, the ceramic-like housing 100 provided herein has excellent wear resistance and corrosion resistance. In one embodiment, the jean abrasion test, the wire ball abrasion test and the artificial sweat test find that the ceramic-like shell 100 provided by the application has no color change on the surface of the optical film 40 after the optical film 40 is slightly scratched for 900 times. In one embodiment, the ink layer 20 has a hardness of H ₁ The hardness of the liquid glass layer 30 is H ₂ The hardness of the optical film layer 40 is H ₃ Wherein H is ₁ ≤3H，3H＜H ₂ ＜9H，H ₃ At this time, the optical film layer 40 is slightly scratched by friction for 1000 times, and the surface of the optical film layer 40 does not change color for 96 hours, so that the optical film layer has excellent service performance. In the present application, the jean abrasion test includes binding jean or steel wool as an abrasion object on a linear abrasion tester equipment abrading head, loading 1kg, abrasion contact area 2cm×2cm, and abrasion travel 50mm, at a given abrasionObserving the abrasion condition of the surface under the times; the imitation ceramic shell 100 is wrapped in dust-free cloth soaked with artificial sweat (NaCl and ammonia water are main components), and placed in a high-temperature and high-humidity environment (55 ℃ and 95% humidity) for a certain time, and then taken out to observe the surface condition of the imitation ceramic shell 100.

In the present embodiment, by comparing the ceramic-like housing 100 and the ceramic housing having the same color as the ceramic-like housing 100, it was found that the color difference value of both was not more than 1, while the reflectance difference was not more than 3%. The ceramic-like shell 100 provided by the application has ceramic color and enamel feel, and can realize ceramic appearance effect.

The present application also provides a flowchart of a method for preparing a ceramic-like shell, where the method for preparing the ceramic-like shell 100 according to any one of the above embodiments includes: the ceramic-like housing 100 is obtained by sequentially molding the ink layer 20, the liquid glass layer 30, and the optical film layer 40 on the non-ceramic substrate 10.

Referring to fig. 4, a flowchart of a method for manufacturing a ceramic-like shell according to an embodiment of the present application includes:

operation 101: and (3) coating ink on the non-ceramic substrate, and forming an ink layer after curing.

Operation 102: and coating liquid glass on the ink layer, and curing to form a liquid glass layer.

Operation 103: an optical film layer is formed on the liquid glass layer by vapor deposition.

In operation 101, the shape, size, material, etc. of the non-ceramic substrate 10 are not limited, and are selected according to actual needs. In the present application, the ceramic-like housing 100 may be, but is not limited to, a rear shell and/or a center of an electronic device. For example, the non-ceramic substrate 10 may be molded into the shape of the electronic device case, or the non-ceramic substrate 10 may be molded into the shape of the electronic device case after a film layer is formed thereon. In the present embodiment, the ink layer 20 may be formed by applying ink and then curing. In particular, the ink may be applied by, but is not limited to, coating, printing, casting, calendaring, and the like. In one embodiment, during the ink application process, the mask plate may be provided to form the ink layer 20 having various appearance effects such as a pattern effect, a color bumping effect, etc., so as to enrich the visual effect of the ceramic-like housing 100. In another embodiment, the ink layer 20 may be formed by applying ink multiple times and curing multiple times to improve the usability of the ink layer 20.

In operation 102, the liquid glass includes silica and a solvent, which may be, but is not limited to, water, ethanol, and the like. In one embodiment, curing includes baking at 20 ℃ to 80 ℃ for 10min to 60min. The thickness of the liquid glass layer 30 is further controlled by controlling the amount of liquid glass applied. In one embodiment, the thickness of the liquid glass layer 30 is less than or equal to 5 μm. By providing the liquid glass layer 30 with a thinner thickness, the quality of the ceramic-like housing 100 is not increased, and the overall bonding performance can be improved.

In operation 103, the optical film layer 40 may be formed by physical vapor deposition or chemical vapor deposition, specifically, the optical film layer 40 may be formed by low pressure chemical vapor deposition, atmospheric pressure chemical vapor deposition, evaporation, sputtering, ion plating, or the like. In one embodiment, the ion bombardment treatment of the liquid glass layer 30 is further included before forming the optical film layer 40. Specifically, ar can be generated by, but not limited to, charging Ar gas (Ar) in a vacuum environment and ionizing neutral Ar atoms ⁺ Charged Ar ⁺ The surface of the liquid glass layer 30 is impacted under the action of the electric field, and chemical bonds on the surface of the liquid glass layer 30 are broken, so that an active interface is generated. Therefore, when the optical film layer 40 is formed later, chemical bonds can be formed between the optical film layer 40 and inorganic substances such as silicon dioxide and the like, so that the stability and the reliability of an interface are provided, and the wear resistance and the corrosion resistance of the whole structure are improved.

In the present embodiment, the functional layer 50 is further formed on the surface of the optical film layer 40. In one embodiment, the functional layer 50 includes at least one of an anti-fingerprint layer and an anti-glare layer. The anti-fingerprint layer has the functions of preventing dirt and adhesion of fingerprints. Specifically, the contact angle of the surface of the anti-fingerprint layer can be more than 105 degrees, which is beneficial to improving the capability of preventing fingerprints and pollutants from adhering to the surface; the anti-glare layer can reduce the glare effect so that the ceramic-like housing 100 more closely approximates the texture of real ceramics.

In the present embodiment, after the ink layer 20, the liquid glass layer 30, and the optical film layer 40 are formed on the non-ceramic substrate 10, the ceramic-like housing 100 of a desired shape may be formed by a high pressure molding process. For example, 3D hot-bending forming may be performed in a high-pressure forming machine to obtain a 3D ceramic-like shell 100 of a desired curvature. Specifically, the molding pressure can be, but is not limited to, 15Bar-100Bar at 150-300 ℃ and the hot pressing is carried out for 0.5-5 min. When the ceramic-like shell 100 is in a shape with a certain radian, such as 2.5D, 3D, etc., the non-ceramic substrate 10 can be optionally formed with each film and then hot-pressed, which is beneficial to the preparation of each film and makes the distribution of each film on the non-ceramic substrate 10 uniform.

In an embodiment of the present application, computer numerically controlled precision machining (CNC machining) of the simulated ceramic housing 100 is also included. Excess scrap can be milled through CNC machining to obtain the final desired assembled mating dimensions of the simulated ceramic shell 100.

The preparation method of the ceramic-like shell 100 is simple to operate, easy for mass production, high in preparation efficiency and yield, capable of preparing the ceramic-like shell 100 with ceramic effect and beneficial to application.

The present application also provides an electronic device comprising the ceramic-like housing 100 of any of the above embodiments. It is understood that the electronic device may be, but is not limited to, a cell phone, tablet, notebook, watch, MP3, MP4, GPS navigator, digital camera, etc. In one embodiment of the present application, an electronic device includes a ceramic-like housing and a motherboard, the ceramic-like housing including the ceramic-like housing 100 of any of the above embodiments. Through setting up imitative ceramic shell 100 for electronic equipment has realized the outward appearance of ceramic feel under the prerequisite of not utilizing ceramic material, has avoided current ceramic product yields and productivity not high, can't realize the problem of using on a large scale in electronic equipment, thereby has promoted electronic equipment's outward appearance effect diversified, reinforcing product competitiveness.

Examples

Imitation potteryThe ceramic shell comprises a non-ceramic substrate, an ink layer, a liquid glass layer and an optical film layer which are sequentially laminated, wherein the non-ceramic substrate is an aluminum alloy; the ink layer comprises a primer layer, a middle paint layer and a top paint layer, the total thickness of the ink layer is 35 mu m, the hardness is 3H, the reflectivity is 5%, and the ink layer is white; the thickness of the liquid glass layer is 3 mu m, the hardness is 6H, and the reflectivity is 8%; the optical film layer is three layers of SiO ₂ Layer and three layers Nb ₂ O ₃ Layer of SiO ₂ Layer and Nb ₂ O ₃ Layers are alternately laminated and arranged, siO ₂ The layer is arranged on the surface of the liquid glass layer, siO ₂ The thickness of the layer is 40nm, nb ₂ O ₃ The thickness of the layer was 5nm, the hardness of the optical film layer was 9H, and the reflectance was 12%. The ceramic-like shell has the appearance color and glaze texture of ceramic as can be seen through observation.

Effect examples

A housing is provided that is substantially identical to the ceramic-like housing of the example, except that a liquid glass layer is not included as a comparative example.

The cases of the examples and comparative examples were subjected to the same denim friction test, wire ball friction test and artificial sweat test, the results of which are shown in table 1, wherein the denim friction test and the wire ball friction test include binding denim or wire wool as a friction material on a grinding head of a linear friction meter apparatus, and observing the abrasion condition of the surface of the product at a given number of times of friction under a load of 1kg, a friction contact area of 2cm×2cm, and a friction stroke of 50 mm; wrapping the product in dust-free cloth soaked with artificial sweat (mainly prepared from NaCl and ammonia water), placing in high-temperature and high-humidity environment (55deg.C, 95% humidity) for a certain time, and taking out to see whether the surface of the product is corroded or discolored.

Table 1 effect example test results

	Denim friction test	Steel wire ball friction test	Artificial sweat test
				Examples	500 times optical film grinding	50 times of optical film grinding	96h surface discoloration
Comparative example	1000 times slight scratch of optical film layer	1000 times slight scratch of optical film layer	96h surface has no color change

Compared with the shell provided by the comparative example, the ceramic-like shell provided by the embodiment of the application is more similar to the texture of ceramic in appearance; and find in performance detection that the application provides a liquid glass layer has been set up in the imitative ceramic shell for the binding property between each layer is more excellent, synergistic between each layer, has promoted wearability and corrosion resistance, and the wholeness can be excellent, more is favorable to the application.

The foregoing has outlined rather broadly the more detailed description of the embodiments of the present application in order that the principles and embodiments of the present application may be explained and illustrated herein, the above description being provided for the purpose of facilitating the understanding of the method and core concepts of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. The ceramic-like shell is characterized by comprising a non-ceramic substrate, an ink layer, a liquid glass layer and an optical film layer which are sequentially laminated, wherein the hardness of the ink layer is H ₁ The hardness of the liquid glass layer is H ₂ The hardness of the optical film layer is H ₃ Wherein H is ₁ ≤3H，3H＜H ₂ ＜9H，H ₃ More than or equal to 9H, the liquid glass layer is formed by coating liquid glass and then solidifying, the liquid glass comprises silicon dioxide and a solvent, and the solvent comprises at least one of water and ethanol; the reflectivity of the ink layer is R ₁ The reflectivity of the liquid glass layer is R ₂ The reflectivity of the optical film layer is R ₃ Wherein R is ₁ ≤5％，5％＜R ₂ ＜10％，R ₃ ≥10％。

2. The ceramic-like body of claim 1, wherein the optical film layer has a reflectivity of 10% to 15%.

3. The ceramic-like enclosure of claim 1, wherein the liquid glass layer has a thickness of less than or equal to 5 μm and an optical transmission of greater than 90%.

4. The ceramic-like enclosure of claim 1, wherein the material of the liquid glass layer comprises silica having a particle size of less than 20nm.

5. The ceramic-like housing of claim 1, wherein the non-ceramic substrate material comprises at least one of glass, metal, and plastic.

6. The preparation method of the ceramic-like shell is characterized by comprising the following steps of:

sequentially forming an ink layer, a liquid glass layer and an optical film layer on a non-ceramic substrate to obtain the ceramic-like shell, wherein the hardness of the ink layer is H ₁ The liquid glassThe hardness of the glass layer is H ₂ The hardness of the optical film layer is H ₃ Wherein H is ₁ ≤3H，3H＜H ₂ ＜9H，H ₃ More than or equal to 9H, the liquid glass layer is formed by coating liquid glass and then solidifying, the liquid glass comprises silicon dioxide and a solvent, and the solvent comprises at least one of water and ethanol; the reflectivity of the ink layer is R ₁ The reflectivity of the liquid glass layer is R ₂ The reflectivity of the optical film layer is R ₃ Wherein R is ₁ ≤5％，5％＜R ₂ ＜10％，R ₃ ≥10％。

7. The method of manufacturing as claimed in claim 6, comprising:

coating ink on the non-ceramic substrate, and forming an ink layer after curing;

coating liquid glass on the ink layer, and forming the liquid glass layer after curing;

the optical film layer is formed on the liquid glass layer by vapor deposition.

8. The method of manufacturing according to claim 7, further comprising ion bombardment treatment of the liquid glass layer prior to forming the optical film layer.

9. The electronic equipment is characterized by comprising a ceramic-like shell and a main board, wherein the ceramic-like shell comprises a non-ceramic base material, an ink layer, a liquid glass layer and an optical film layer which are sequentially laminated, and the hardness of the ink layer is H ₁ The hardness of the liquid glass layer is H ₂ The hardness of the optical film layer is H ₃ Wherein H is ₁ ≤3H，3H＜H ₂ ＜9H，H ₃ More than or equal to 9H, the liquid glass layer is formed by coating liquid glass and then solidifying, the liquid glass comprises silicon dioxide and a solvent, and the solvent comprises at least one of water and ethanol; the reflectivity of the ink layer is R ₁ The reflectivity of the liquid glass layer is R ₂ The optical systemThe reflectivity of the film layer is R ₃ Wherein R is ₁ ≤5％，5％＜R ₂ ＜10％，R ₃ ≥10％。