CN102795846A

CN102795846A - Formula of thin micro-powder polished tile

Info

Publication number: CN102795846A
Application number: CN2012102928383A
Authority: CN
Inventors: 梁桐灿; 侯斌; 宋奕强
Original assignee: Guangdong Hongwei Ceramic Industry Co Ltd; GUANGDONG WINTO CERAMICS CO Ltd
Current assignee: Guangdong Hongwei Ceramic Industry Co Ltd; GUANGDONG WINTO CERAMICS CO Ltd
Priority date: 2012-08-16
Filing date: 2012-08-16
Publication date: 2012-11-28

Abstract

The invention discloses a formula of a thin micro-powder polished tile. According to the formula, the tile comprises the following components by weight: 66.86 parts of SiO2, 21.35 parts of Al2O3, 0.49 part of Fe2O3, 0.26 part of TiO2, 1.01 parts of CaO, 1.96 parts of MgO, 1.31 parts of K2O, 1.78 parts of Na2O, and 5.39 parts of IL. After employing the technical scheme provided in the invention, the rupture modulus and dry strength of a thin micro-powder polished tile green body can be improved, thus satisfying the strength requirement for the green body during production. After adopting the formula, a proper amount of quartz phase can be formed and the mullite crystal phase content can be increased in a sintering process, and the strength of a sintered tile can be enhanced, thus meeting the use demands.

Description

A kind of prescription of slim micro-powdered polishing brick

Technical field:

The present invention relates to a kind of prescription of slim micro-powdered polishing brick.

Background technology:

The production process of slim micro-powdered polishing brick is basic identical with the process of original common micro-powdered polishing brick; Because the operation of ceramic tile production process is many; If adopting existing thick adobe body prescription forms; After the base substrate reduced thickness, its intensity can correspondingly obviously reduce, and the splits green compact are cracked easily in the transmission operation of production process; In addition, splits becomes the porcelain sintering strength too low, in post-production, transportation, paving and use, also is vulnerable to destroy.Therefore, the primary problem that solves of the production of splits is the intensity of green compact, promptly need form through the adjustment body recipe, makes the dry tenacity of its green compact reach the production process requirement, secondly is that the brick strength behind the sintering also will reach request for utilization.

Summary of the invention:

The objective of the invention is provides a kind of green strength can satisfy the production process requirement in order to overcome the shortcoming of above-mentioned prior art, and brick strength satisfies the slim micro-powdered polishing brick prescription of request for utilization behind the sintering.

Goal of the invention of the present invention can realize through following technical scheme: a kind of prescription of slim micro-powdered polishing brick, and following by its weight proportion: SiO ₂66.86 part, Al ₂O ₃21.35 part, Fe ₂O ₃0.49 part, TiO ₂0.26 part, 1.01 parts of CaO, 1.96 parts of MgO, K ₂1.31 parts of O, Na ₂1.78 parts of O, 5.39 parts of IL.

After adopting the present technique scheme, the invention has the beneficial effects as follows: improved the modulus of rupture and the dry tenacity of slim micro-powdered polishing brick green compact, thereby satisfied the requirement of strength of production process green compact; After adopting this prescription, in sintering process, can form an amount of quartz phase and increase the brilliant content of mullite, the intensity of brick body satisfies request for utilization behind the raising sintering.

Description of drawings:

Fig. 1 is for adopting the fill a prescription XRD figure of sintering gained splits brick body of the present invention;

Fig. 2 is for adopting the fill a prescription section SEM micro-structure diagram of sintering gained splits brick body of the present invention;

Fig. 3 adopts the present invention's SEM micro-structure diagram behind the sintering gained splits brick body section of filling a prescription for corrosion.

Embodiment:

Below in conjunction with present technique is described further.

The prescription of slim micro-powdered polishing brick, following by its weight proportion: a kind of prescription of slim micro-powdered polishing brick, following by its weight proportion: SiO ₂66.86 part, Al ₂O ₃21.35 part, Fe ₂O ₃0.49 part, TiO ₂0.26 part, 1.01 parts of CaO, 1.96 parts of MgO, K ₂1.31 parts of O, Na ₂1.78 parts of O, 5.39 parts of IL.IL wherein representes burning decrement.

After adopting above-mentioned technical formula, the brick body behind green compact and the sintering has following advantage.

(1) green compact strengthen

Test is found; If adopt conventional ceramic adobe body prescription and identical production technique (forming pressure 12000N); When its thickness when 12.5mm is thinned to 6.0mm; The green compact dry tenacity obviously reduces, and its modulus of rupture is reduced to 0.75MPa from 1.34MPa, can't satisfy the subsequent production process to the green strength requirement.Combine for improving the green compact particle, improve the green compact dry tenacity, present technique research has suitably increased the content of fat clay class raw material and has reduced feldspar stone grain content on the basis of original conventional ceramic adobe body prescription in formulating of recipe.Test shows; Plastic material (comprising kaolin and ball clay) content is increased at 38% o'clock; Can effectively improve the dry tenacity of splits green compact, as shown in table 1, the modulus of rupture of splits reaches 1.27MPa; Improved about 69%, with thickness be that the modulus of rupture (1.34MPa) of 12.5mm common brick is close.In fact, just as shown in table 1, optimizing under the forming pressure, adopt the dry tenacity of the green compact of optimization of C preparation can reach 1.73MPa, far above thickness the intensity of 12.5mm common brick green compact.Production test shows that also the splits of present technique development can satisfy slim production requirement of oozing colored polished tile fully owing to have higher green strength.

Splits and the contrast of common brick dry tenacity behind the table 1 prescription compositional optimization

(annotate: blank forming pressure 12000N)

(2) improve into the porcelain sintering strength

Brick strength behind the high temperature sintering depends primarily on the microtexture and the thing phase composite of base substrate.In porcelain body, form an amount of quartz phase and increase the intensity that the mullite crystal content helps improving sintered body, Al during especially suitably raising is filled a prescription ₂O ₃Content is one of ceramic tile Enhancement Method commonly used with the formation that promotes the mullite crystalline phase.Directly add corundum powder; After high temperature burns till, in base substrate, form the residual corundum phase that disperse distributes, also can strengthen, but the corundum powder add-on can not be too many on the one hand ceramic tile; Otherwise can improve brick body vitrification point; On the other hand, the corundum powder cost of material is higher, will improve the splits production cost.In addition, improve the blank sintering density, reducing pore (especially a small amount of gross blow hole) content also is to realize one of base substrate enhanced important means.

Al is adopted in present technique research in formulating of recipe ₂O ₃The higher relatively washing ball clay of content replaces part kaolin, suitably to improve Al in the body recipe ₂O ₃In the time of content, also more help improving under the high-temperature liquid-phase existence condition Al ₂O ₃Active with quartz reaction, form more mullite crystalline phase.Under hot conditions, improve liquid phase glassy phase content, help reducing mullite formation temperature and the generation that promotes the mullite crystalline phase.In the present technique research under relatively low firing temperature condition; Form the relatively large liquid phase of more viscosity to the greatest extent; In body recipe, introduced the part talcum to improve MgO content (promptly increasing the component concentration of divalent alkaline-earth metal), itself and prescription have been formed in the andesine class stone grain existed the monovalent base metal component to form composite fluxing agent.Research shows; Through forming polynary composite fluxing agent; Not only can reduce the liquid phase eutectoid point, under the splits firing condition, produce an amount of amount of liquid phase that increases and form, thereby improve blank strength to promote mullite; Also can make generation liquid phase have relatively large viscosity, thereby can avoid that liquid phase increases the difficult problem that possibly cause that blank deformation increases in the high temperature sintering process.

Present technique is through the body recipe composition research; The chemical constitution of the basic blank that acquisition is optimized is as shown in table 2; The required material of base furnish of table 3 expression preparation present technique; Compare with conventional ceramic brick prescription, aluminum content wants high in the prescription of optimization, silicon content is lower slightly, and potassium, sodium and calcium, Mg content are also higher in addition.Test shows; Through above-mentioned prescription compositional optimization, can obviously improve the physical strength of splits, slim micro-powdered polishing brick thickness is about 5.6mm; When forming pressure is 12000N; Its modulus of rupture reaches 38.7MPa, and with the 39.8MPa close (seeing table 4) of conventional ceramic brick (thickness is about 11.5mm), this shows that the base substrate enhancement measures of taking in the present technique research is very effective.When moulding pressure increases to 17000N, the splits modulus of rupture even can reach 45.4MPa.

The basic blank chemical constitution of table 2 (part)

SiO ₂	Al ₂O ₃	Fe ₂O ₃	TiO ₂	CaO	MgO	K ₂O	Na ₂O	IL
									66.86	21.35	0.49	0.26	1.01	1.96	1.31	1.78	5.39

The material prescription of the basic blank of table 3 (part)

Splits and the contrast of common brick sintering strength behind the table 4 prescription compositional optimization

Sample	Thickness (mm)	Strength at break (N)	The modulus of rupture (MPa)
				The splits of present technique development	5.6	810	38.7
The regular convention formula splits	5.6	490	23.5
				The conventional ceramic brick	11.5	2650	39.8

(annotate: blank forming pressure is 12000N)

Fig. 1 is the XRD figure spectrum of splits brick body behind 1190 ℃ of sintering.As seen from the figure, behind the sintering in the brick body principal crystalline phase be quartz mutually outside, also formed tangible mullite crystalline phase, this compositional optimization of filling a prescription just improves the major reason of the mechanical strength of brick body.Fig. 2 is a splits brick body section SEM micro-structure diagram behind the sintering.Visible by figure, the splits brick body compact micro structure of present technique development, the pore amount is few, and pore size is less and be evenly distributed.Fig. 3 is the sintering splits brick body section SEM microtexture after the hydrofluoric acid solution of employing 5% corrodes, and has formed a large amount of needle-like mullite crystals in the visible brick body.This is owing to pass through to form polynary composite fluxing agent in the present technique research; Reduce the liquid phase eutectoid point and increased liquid content; Not only promoted brick height temperature sintering densification; Also promoted the formation of needle-like mullite crystal greatly, and needle-like crystal is interweaved, thereby also must improves the strength at break and the modulus of rupture of brick body greatly.The innovation of this NEW TYPE OF COMPOSITE flux technology has solved in prescription the content that strengthens plastic raw material because of the green strength that will improve splits splits has been burnt till afterwards the intensity of brick body and the contradiction of deformation effect.

The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Any those of ordinary skill in the art; Do not breaking away under the technical scheme scope situation of the present invention; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to technical scheme of the present invention, or are revised as the equivalent embodiment of equivalent variations.So every content that does not break away from technical scheme of the present invention, the equivalence of doing according to the present invention's shape, structure and principle changes, and all should be covered by in protection scope of the present invention.

Claims

1. the prescription of a slim micro-powdered polishing brick is following by its weight proportion: SiO ₂66.86 part, Al ₂O ₃21.35 part, Fe ₂O ₃0.49 part, TiO ₂0.26 part, 1.01 parts of CaO, 1.96 parts of MgO, K ₂1.31 parts of O, Na ₂1.78 parts of O, 5.39 parts of IL.