CN104308956B - Ceramic idiosome and the production method thereof of low-shrinkage - Google Patents
Ceramic idiosome and the production method thereof of low-shrinkage Download PDFInfo
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- CN104308956B CN104308956B CN201410512286.1A CN201410512286A CN104308956B CN 104308956 B CN104308956 B CN 104308956B CN 201410512286 A CN201410512286 A CN 201410512286A CN 104308956 B CN104308956 B CN 104308956B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/003—Pressing by means acting upon the material via flexible mould wall parts, e.g. by means of inflatable cores, isostatic presses
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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Abstract
The ceramic idiosome and the production method thereof that the present invention relates to a kind of low-shrinkage, belong to ceramic production technology field. In the present invention, get 92 ~ 95 weight portion aluminium oxide, 1 ~ 3 weight portion silica, 1 ~ 2 weight portion calcium carbonate, 0.5 ~ 1.5 weight portion kaolin, 1.5 ~ 2.5 weight portion zirconium silicates makes after slurry on ball mill, pass through respectively granulation, homogenize, screening, after adopting isostatic pressing method moulding, on lathe, be processed into ceramic idiosome, the ceramic green density of preparing is 3.69 ~ 3.72g/cm3, and the shrinkage factor of 1550 DEG C of high temperature sinterings ceramic idiosome after 3 hours is 7.3 ~ 7.5%. Production stage of the present invention is simple, adds zirconium silicate in raw material, has reduced the frictional force of ceramic powder in forming process, makes the density of ceramic idiosome more even; Pottery idiosome is low through high temperature sintering post-shrinkage ratio, and the ceramic idiosome of preparing is applicable to make the effective metallized ceramic shell of vacuum switch.
Description
Technical field
The present invention relates to a kind of production method of ceramic idiosome, be specifically related to a kind of production method of ceramic idiosome of low-shrinkage, belong to ceramic production technology field.
Background technology
Ceramic is by dusty material being processed into certain state according to the method for densifying of pottery itself, adopt the pressure method suitable with product to be pressurizeed, then it being carried out to sintering forms, therefore ceramic material completes the intensity of the material after dry processing after the intensity of pressure period, pressurization, contraction in contraction and the sintering process of dry run, and these characteristics of the softening sex change causing of material in sintering process all directly affect the quality of ceramic. The field of applications in ceramics is very extensive, but the requirement of the characteristic of the ceramic of different field application is also different. Produce in the effective metallized ceramic shell of vacuum switch idiosome and can use ceramic, the effective metallized ceramic shell of vacuum switch is by managing the electric arc producing when the superior isolation of interior vacuum is extinguished forceful electric power break-make, can avoid accident and unexpected generation, in the distribution system such as electric power, metallurgy, have a wide range of applications, therefore higher to the ceramic idiosome performance requirement of needs, need the ceramic idiosome shrinkage factor of preparation less, density is comparatively even, but the ceramic idiosome sintering post-shrinkage ratio size of producing is at present the Density Distribution inequality of 16% left and right and ceramic idiosome. In the larger use of shrinkage factor of pottery idiosome, deformation of products is more serious, as: bore twisted not circle, geometry have irregular change etc., and these will directly affect the service property (quality) of the effective metallized ceramic shell of vacuum switch.
Summary of the invention
The object of the invention is in order to solve the ceramic idiosome sintering post-shrinkage ratio that prior art produces highly, the shortcoming of Density Distribution inequality, provides the simple low-shrinkage of a kind of step pottery idiosome production method, and the ceramic idiosome shrinkage factor of production is low, even density.
The present invention adopts following technical scheme: a kind of production method of ceramic idiosome of low-shrinkage, comprises the steps:
(1) raw material ball milling: pour the raw material of 92 ~ 95 weight portion aluminium oxide, 1 ~ 3 weight portion silica, 1 ~ 2 weight portion calcium carbonate, 0.5 ~ 1.5 weight portion kaolin, 1.5 ~ 2.5 weight portion zirconium silicates into ball mill, in raw material and ball mill, the mass ratio of ballstone is 3 ~ 5:1, ball milling 22 ~ 24 hours, drum's speed of rotation 30 ~ 33r/min, obtains the slurry of viscosity 6010 ~ 6020mpa.s;
(2) granulation: the slurry after ball milling is added to centrifugal atomizer entrance, and sprayer nozzle is with the frequency rotation of 16 ~ 18Hz/RPM, and the powder particle size obtaining is 95 ~ 230 μ m;
(3) homogenize: the powder after granulation is put into homogenization machine and stir 25 ~ 35min, homogenization machine rotating speed 12 ~ 15r/min, the charging aperture of homogenization machine and discharging opening are provided with permanent bar magnet can clear up the impurity such as iron and the oxide of iron in powder;
(4) screening: the powder after homogenize is first through 80 ~ 90 object sieves and then through 115 ~ 130 object sieve screenings, and the powder particle size size obtaining is 120 ~ 180 μ m;
(5) moulding: use isostatic pressing method moulding, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurize by pressure charging system, make the pressure of isostatic pressing machine be controlled at 220 ~ 240Mpa, obtain ceramic idiosome, operating environment temperature keeps 22 ~ 24 DEG C;
(6) Vehicle Processing: utilize lathe that ceramic idiosome is made to needed shape.
Further, when described step (1) Raw ball milling, add binding agent PVA, softening agent ethylene glycol, the solidifying acrylates of grinding aid ammonium, the addition of described binding agent PVA is 5 ~ 6% of raw material gross mass, the addition of described softening agent ethylene glycol be raw material gross mass 1 ~ 1.5%, the addition of the solidifying acrylates of described grinding aid ammonium is 0.5 ~ 1% of raw material gross mass.
Further, adopting the ceramic green density size of this kind of production is 3.69 ~ 3.72g/cm3, and the shrinkage factor through 1550 DEG C of high temperature sinterings after 3 hours is 7.3 ~ 7.5%.
Production stage of the present invention is simple, adds zirconium silicate in raw material, has reduced the frictional force of ceramic powder in forming process, makes the density of ceramic idiosome more even; Lean on two-way or unidirectional exerting pressure compared to traditional dry-pressing, injection moulding, adopt iso-static pressure shaping machine by liquid pressure transmission, make each surface of ceramic idiosome be subject to equal pressure, ceramic green density uniformity is high, and the ceramic idiosome in the present invention is low through high temperature sintering post-shrinkage ratio.
Brief description of the drawings
Fig. 1 is the influence curve of sintering temperature to ceramic green density in the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated.
Embodiment mono-:
A production method for the ceramic idiosome of low-shrinkage, comprises the steps:
(1) raw material ball milling
Pour the raw material of 95 weight portion aluminium oxide, 1 weight portion silica, 1.5 weight portion calcium carbonate, 0.5 weight portion kaolin, 1.5 weight portion zirconium silicates into ball mill, in raw material and ball mill, the mass ratio of ballstone is 3:1, add the binding agent PVA of raw material gross mass 5%, the softening agent ethylene glycol of raw material gross mass 1%, the solidifying acrylates of grinding aid ammonium of raw material gross mass 1% simultaneously, drum's speed of rotation 30r/min, ball milling 23.5 hours, obtains the slurry of viscosity 6010mpa.s;
(2) granulation
Slurry is added to centrifugal atomizer entrance, and sprayer nozzle is with the frequency rotation of 17Hz/RPM, powder particle size 95 ~ 230 μ m that obtain;
(3) homogenize
Powder after granulation is put into homogenization machine and stir 25min, homogenization machine rotating speed 13r/min;
(4) screening
Powder after homogenize is first through 80 object sieves and then through 115 object sieve screenings, the powder particle size size obtaining is 120 ~ 180 μ m, and the charging aperture of homogenization machine and discharging opening are provided with permanent bar magnet can clear up the impurity such as iron and the oxide of iron in powder;
(5) moulding
Use isostatic pressing method moulding, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurize by pressure charging system, the pressure of isostatic pressing machine is controlled at 225Mpa, obtains ceramic idiosome, and operating environment temperature keeps 22 DEG C;
(6) Vehicle Processing
Utilize lathe that ceramic idiosome is made to the tubulose that external diameter is 75.8mm for 109.8mm, internal diameter for 94.6mm, height.
The tubular ceramic idiosome of above-mentioned production is placed in to natural gas sintering furnace and carries out high temperature sintering, temperature is 1550 DEG C, sintering time is 3 hours, after high temperature sintering the external diameter of ceramic idiosome be 101.6mm, internal diameter 87.5mm, highly for 70.1mm, the shrinkage factor of ceramic idiosome is 7.5%.
The assay method of pottery green density: the ceramic idiosome after sintering is cut into the fritter of 2*2mm, utilize assay balance to measure its density for 3.71g/cm3.
Embodiment bis-:
A production method for the ceramic idiosome of low-shrinkage, comprises the steps：
(1) raw material ball milling
Pour 92 weight portion aluminium oxide, 2 weight portion silica, 1 weight portion calcium carbonate, 1 weight portion kaolin, 2 weight portion zirconium silicates into ball mill, in raw material and ball mill, the mass ratio of ballstone is 4:1, add the binding agent PVA of raw material gross mass 6%, the softening agent ethylene glycol of raw material gross mass 1%, the solidifying acrylates of grinding aid ammonium of raw material gross mass 0.5% simultaneously, ball milling 22 hours, drum's speed of rotation 32r/min, obtains the slurry of viscosity 6020mpa.s;
(2) granulation
Slurry adds centrifugal atomizer entrance, and sprayer nozzle is with the frequency rotation of 16Hz/RPM, powder particle size 100 ~ 200 μ m that obtain;
(3) homogenize
Powder after granulation is put into homogenization machine and stir 30min, homogenization machine rotating speed 12r/min;
(4) screening
Powder after homogenize is first through 90 object sieves and then through 115 object sieve screenings, the powder particle size size obtaining is 125 ~ 160 μ m, and the charging aperture of homogenization machine and discharging opening are provided with permanent bar magnet can clear up the impurity such as iron and the oxide of iron in powder;
(5) moulding
Use isostatic pressing method moulding, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurize by pressure charging system, make the pressure of isostatic pressing machine be controlled at 220Mpa, obtain ceramic idiosome, operating environment temperature keeps 22 DEG C;
(6) Vehicle Processing
Utilize lathe ceramic idiosome to be made to the tubulose of external diameter 110.1mm, internal diameter 93.7mm, height 75.3mm.
The tubular ceramic idiosome of above-mentioned preparation is placed in to natural gas sintering furnace and carries out high temperature sintering, temperature is 1550 DEG C, sintering time is 3 hours, the external diameter 102.1mm of ceramic idiosome, internal diameter 86.9mm, height 69.8mm after high temperature sintering, and the shrinkage factor of ceramic idiosome is 7.3%.
The assay method of pottery green density: the product after sintering is cut into the fritter of 2*2mm, utilize assay balance to measure its density for 3.69g/cm3.
Embodiment tri-:
A production method for the ceramic idiosome of low-shrinkage, comprises the steps:
(1) raw material ball milling
Pour the raw material of 94 weight portion aluminium oxide, 3 weight portion silica, 2 weight portion calcium carbonate, 1.5 weight portion kaolin, 2 weight portion zirconium silicates into ball mill, in raw material and ball mill, the mass ratio of ballstone is 5:1, add the binding agent PVA of raw material gross mass 5.5%, the softening agent ethylene glycol of raw material gross mass 1.5%, the solidifying acrylates of grinding aid ammonium of raw material gross mass 1% simultaneously, ball milling 24 hours, drum's speed of rotation 33r/min, obtains the slurry of viscosity 6012mpa.s;
(2) granulation
Slurry adds centrifugal atomizer entrance, and sprayer nozzle is with the frequency rotation of 18Hz/RPM, powder particle size 95 ~ 210 μ m that obtain;
(3) homogenize
Powder after granulation is put into homogenization machine and stir 35min, homogenization machine rotating speed 15r/min;
(4) screening
Powder after homogenize is first through 80 object sieves and then through 120 object sieve screenings, the powder particle size size obtaining is 120 ~ 180 μ m, and the charging aperture of homogenization machine and discharging opening are provided with permanent bar magnet can clear up the impurity such as iron and the oxide of iron in powder;
(5) moulding
Use isostatic pressing method moulding, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurize by pressure charging system, making the pressure of isostatic pressing machine is 240Mpa, obtains ceramic idiosome, and operating environment temperature keeps 24 DEG C;
(6) Vehicle Processing
Utilize lathe ceramic idiosome to be made to the tubulose of external diameter 107.2mm, internal diameter 93mm, height 75.7mm.
The tubular ceramic idiosome of above-mentioned preparation is placed in to natural gas sintering furnace and carries out high temperature sintering, temperature is 1550 DEG C, sintering time is 3 hours, after high temperature sintering the external diameter of ceramic idiosome be 99.4mm, internal diameter be 86.2mm, highly for 70.2mm, the shrinkage factor of ceramic idiosome is 7.3%.
The assay method of pottery green density: the ceramic idiosome after sintering is cut into the fritter of 2*2mm, utilize assay balance to measure its density for 3.72g/cm3.
As shown in Figure 1, be 3.1g/cm3 through isostatic pressing machine ceramic green density out, through high temperature sintering, along with the density of the rising pottery idiosome of temperature becomes large, during to 1550 DEG C, density obtains maximum 3.72g/cm3, afterwards along with the rising of temperature, volatilization is complete mutually for the brilliant picture of glass in pottery, and the density of pottery remains on 3.6 ~ 3.7g/cm3.
Claims (2)
1. a ceramic idiosome production method for low-shrinkage, is characterized in that: comprise the steps:
(1) raw material ball milling: pour the raw material of 92 ~ 95 weight portion aluminium oxide, 1 ~ 3 weight portion silica, 1 ~ 2 weight portion calcium carbonate, 0.5 ~ 1.5 weight portion kaolin, 1.5 ~ 2.5 weight portion zirconium silicates into ball mill, in raw material and ball mill, the mass ratio of ballstone is 3 ~ 5:1, ball milling 22 ~ 24 hours, drum's speed of rotation is 30 ~ 33r/min, obtains the slurry that viscosity is 6010 ~ 6020mpa.s;
(2) granulation: the slurry that ball milling is obtained adds centrifugal atomizer entrance, sprayer nozzle is with the frequency rotation of 16 ~ 18Hz, and the powder particle size obtaining is 95 ~ 230 μ m;
(3) homogenize: the powder after granulation is put into homogenization machine and stir 25 ~ 35min, homogenization machine rotating speed 12 ~ 15r/min;
(4) screening: the powder after homogenize is first through 80 ~ 90 object sieves and then through 115 ~ 130 object sieve screenings, and the powder particle size size obtaining is 120 ~ 180 μ m;
(5) moulding: use isostatic pressing method moulding, the powder after screening is placed in mould, then mould is put into isostatic pressing machine, progressively pressurize by pressure charging system, making the pressure of isostatic pressing machine is 220 ~ 260MPa, obtains ceramic idiosome, and the environment temperature of isostatic pressing machine operation keeps 22 ~ 24 DEG C;
(6) Vehicle Processing: utilize lathe that ceramic idiosome is made to needed shape;
When described step (1) Raw ball milling, add binding agent PVA, softening agent ethylene glycol, the solidifying acrylates of grinding aid ammonium, the addition of described binding agent PVA is 5 ~ 6% of raw material gross mass, the addition of described softening agent ethylene glycol be raw material gross mass 1 ~ 1.5%, the addition of the solidifying acrylates of described grinding aid ammonium is 0.5 ~ 1% of raw material gross mass;
Through 1550 DEG C of high temperature sinterings, the shrinkage factor after 3 hours is 7.3 ~ 7.5% to prepared ceramic idiosome.
2. the ceramic idiosome that adopts the ceramic idiosome production method of low-shrinkage claimed in claim 1 to prepare, is characterized in that: prepared ceramic green density size is 3.69 ~ 3.72g/cm3.
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| CN106866159A (en) * | 2017-03-17 | 2017-06-20 | 无锡康伟工程陶瓷有限公司 | The preparation method of metallized ceramic raw material |
| CN106984823A (en) * | 2017-03-17 | 2017-07-28 | 无锡康伟工程陶瓷有限公司 | The effective metallized ceramic forming method of vacuum switch |
| CN111958762A (en) * | 2020-09-03 | 2020-11-20 | 赣州艺佳兴陶瓷有限公司 | Method for manufacturing ceramic body by using ceramic waste |
| CN113536529B (en) * | 2021-05-24 | 2022-09-06 | 山西中电科新能源技术有限公司 | Furnace feeding assembly optimization method for carbon-carbon composite material deposition |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01129948A (en) * | 1987-11-16 | 1989-05-23 | Murata Mfg Co Ltd | Low-shrinkage ceramics |
| CN1213357A (en) * | 1996-01-18 | 1999-04-07 | 东陶机器株式会社 | Ceramic whiteware, ceramic body, processes for producing these, sanitary ware and process for producing the sanitary ware |
| CN1477687A (en) * | 2002-08-23 | 2004-02-25 | 清华大学 | Process for preparing zero-shrinkage low-temp, co-fired ceramic multi-layer baseplate |
| CN1948226A (en) * | 2006-10-31 | 2007-04-18 | 西安航天复合材料研究所 | Antiaxidation low shrinking ceramic high temperature glue |
| CN102432273A (en) * | 2011-09-21 | 2012-05-02 | 景德镇陶瓷学院 | Method for reducing sintering shrinkage of alumina ceramic material and product prepared by method |
| CN102452122A (en) * | 2010-10-22 | 2012-05-16 | 比亚迪股份有限公司 | Ceramic body and forming method thereof and ceramic product |
| CN103408291A (en) * | 2013-07-22 | 2013-11-27 | 南京中江新材料科技有限公司 | Aluminum oxide ceramic substrate with high heat conductivity and preparation method thereof |
-
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- 2014-09-29 CN CN201410512286.1A patent/CN104308956B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01129948A (en) * | 1987-11-16 | 1989-05-23 | Murata Mfg Co Ltd | Low-shrinkage ceramics |
| CN1213357A (en) * | 1996-01-18 | 1999-04-07 | 东陶机器株式会社 | Ceramic whiteware, ceramic body, processes for producing these, sanitary ware and process for producing the sanitary ware |
| CN1477687A (en) * | 2002-08-23 | 2004-02-25 | 清华大学 | Process for preparing zero-shrinkage low-temp, co-fired ceramic multi-layer baseplate |
| CN1948226A (en) * | 2006-10-31 | 2007-04-18 | 西安航天复合材料研究所 | Antiaxidation low shrinking ceramic high temperature glue |
| CN102452122A (en) * | 2010-10-22 | 2012-05-16 | 比亚迪股份有限公司 | Ceramic body and forming method thereof and ceramic product |
| CN102432273A (en) * | 2011-09-21 | 2012-05-02 | 景德镇陶瓷学院 | Method for reducing sintering shrinkage of alumina ceramic material and product prepared by method |
| CN103408291A (en) * | 2013-07-22 | 2013-11-27 | 南京中江新材料科技有限公司 | Aluminum oxide ceramic substrate with high heat conductivity and preparation method thereof |
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