Magnesian ceramic blank, magnesian ceramic and preparation method thereof

A magnesia porcelain and billet technology, which is applied in the field of ceramics, can solve the problems of reduced risk of porcelain explosion, small thermal expansion coefficient, narrow firing range, etc., and achieve the effect of reducing the risk of porcelain explosion, small thermal expansion coefficient, and widening the sintering range

Active Publication Date: 2013-10-09
HUNAN XIANFENG CERAMIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the technical problems of poor molding performance, narrow firing range and easy porcelain explosion in the traditional daily-use steatite porcelain in the prior art, and provides a new formula of magnesia porcelain, and the coefficient of thermal expansion of the magnesia porcelain obtained from the formula is small , the thermal stability and formability are improved, while the sintering range is wide, the firing temperature is low, and the risk of porcelain frying is greatly reduced

Method used

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  • Magnesian ceramic blank, magnesian ceramic and preparation method thereof
  • Magnesian ceramic blank, magnesian ceramic and preparation method thereof

Examples

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preparation example Construction

[0026] The present invention also provides a preparation method of magnesia porcelain, comprising the following steps:

[0027] S1. Green body preparation: ball mill the green body, sieve it, and roll it after aging to obtain the green body;

[0028] S2, glazing: immerse the green body obtained in step S1 into the glaze slurry, and then put it out, and attach a glaze layer on the surface of the green body to obtain a glazed green body;

[0029] S3. Sintering: drying the glazed green body obtained in step S2, transferring it to a kiln with an oxidizing atmosphere for sintering, and obtaining the magnesia porcelain after cooling;

[0030] Wherein, the blank is the magnesia porcelain blank provided by the present invention.

[0031] According to the preparation method of the present invention, the raw materials are first weighed according to the proportion, and then the raw materials are mixed. In order to ensure that the raw materials are mixed evenly, the hard raw materials s...

Embodiment 1

[0056] (1) Blank A1: raw talc 37.6wt%, burnt talc 25wt%, alumina 8.9wt%, kaolin 10.7wt%, ball clay 7.1wt%, bentonite 3.6wt%, potassium feldspar 7.1wt%.

[0057] (2) Add 0.1% dextrin, 0.025% CMC, and 0.3% sodium humate to the blank A1, then ball mill, sieve, dehydrate, smelt, and shape to obtain the blank A10.

[0058] After testing, the chemical composition of the green body A10 is 57.53wt% SiO 2 , 18.2wt%Al 2 o 3 , 1.61wt%CaO, 20.68wt%MgO, 1.33wt%K 2 O, 0.43wt%Na 2 O, 0.18wt%Fe 2 o 3 , 0.04wt%TiO 2 ; Among them, the amount of crystal phase accounts for 85wt%, and the main crystal phase is original enstatite and cordierite, and feldspar glass accounts for 18wt%.

[0059] (3) Immerse the green body A10 in the glaze slurry B10, quickly form a 0.3mm glaze layer on the surface of the green body A10, dry it until the moisture content is less than 2wt%, and then put it into the kiln for sintering. The sintering curve is as follows: figure 2 shown;

[0060] Glaze B10 is pre...

Embodiment 2

[0063] Magnesia porcelain S20 was prepared by the same preparation method as in Example 1, the difference being:

[0064] In step (1), use blank A2 to replace A1, and the composition of blank A2 is: raw talc 35wt%, burnt talc 25wt%, alumina 10wt%, kaolin 10wt%, ball clay 6.7wt%, bentonite 3.3wt%, potassium feldspar 10wt%;

[0065] In step (2), the chemical composition of the obtained green body A20 is 59.4wt% SiO 2 , 19.8wt%Al 2 O3, 1.5wt%CaO, 18.1wt%MgO, 0.8wt%K 2 O, 0.4wt%Na 2 O; the amount of crystalline phases accounts for 80wt%, the main crystalline phases are enstatite and cordierite, and feldspar glass accounts for 15wt%.

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Abstract

The invention provides novel magnesian ceramic blank. The novel magnesian ceramic blank comprises, by weight percent, 60-70% of talcum, 20-25% of clay, 5-10% of feldspar, and 5-10% of alumina. The talcum is mixture of raw talcum and burnt talcum. The clay is mixture of kaolin, ball clay and bentonite. The invention further provides a preparation method of magnesian ceramic, and the magnesian ceramic prepared by the preparation method. The magnesian ceramic prepared by the magnesian ceramic blank, glaze and the preparation method is low in thermal expansion coefficient, and has improved thermal stability and formability. In addition, sintering range is wide, sintering temperature is low, and the risk of ceramic burst is lowered greatly.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a magnesia porcelain blank, a preparation method of the magnesia porcelain and the magnesia porcelain produced by the preparation method. Background technique [0002] Daily-use talc porcelain is a kind of magnesia porcelain with talc as the main component. It is a new type of porcelain developed by Shandong Silicate Research and Design Institute in the 1970s. After the 1970s, domestic technical personnel in Shandong, Liaoning, Hebei and other porcelain producing areas and Japan have conducted a lot of research and put into mass production. Traditional daily-use talc porcelain uses talc as the main raw material, and its raw material formula is generally 70-75% of burnt talc, 10-15% of feldspar, and 12-18% of clay; it is characterized by high whiteness, high strength, and good light transmittance. , bright color, can be used as fine daily-use porcelain and arts and crafts porcel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/16C04B35/622C04B41/86
Inventor 林迪辉
Owner HUNAN XIANFENG CERAMIC IND
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