Medium temperature sintered cordierite heat-resistant porcelain and preparation method thereof

A cordierite and medium-temperature technology, applied in the field of medium-temperature sintered cordierite heat-resistant porcelain and its preparation, can solve the problems of long firing time, high synthesis temperature of cordierite materials, low thermal expansion coefficient and thermal shock resistance, and achieve High yield, scientific and reasonable production method, good product quality

Inactive Publication Date: 2016-01-27
景德镇市大瓷庄瓷业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Cordierite material has the characteristics of low thermal expansion coefficient, good thermal shock resistance and strong corrosion resistance, and is widely used in various kiln insulation materials, automobile exhaust purifiers, catalyst carriers, etc. There are very few research reports on the preparation of heat-resistant porcelain (such as household cookware, etc.)
Ren Liqin and others used artificially synthesized cordierite to prepare cordierite heat-resistant pots (see "Chinese Ceramics" Vol.43, No.1, Jan.2007, P48), but failed to fundamentally solve the problem of high synthesis temperature of cordierite materials. , long firing time, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Ingredients according to the mass percentage of the raw materials of the heat-resistant porcelain body: 35% cooked talc, 30% alumina powder, 20% clay, 15% feldspar, plus 6% calcium sulfate nanofiber additive;

[0016] (2) According to the batching, ball milling, fineness detection, pulping, sieving and iron removal, adding nanofiber additives and stirring evenly, pressing and squeezing mud, refining mud, aging, and refining mud, the time of ball milling process is 16 hours , the fineness test is passed through a 250-mesh sieve, the sieve residue is 0.7%, and the stale time is 5 days;

[0017] (3) Dry the rolled body at 45°C, trim it, and then burn it to 1260°C for 12 hours, keep it warm for 60 minutes, cool it down to room temperature and leave the kiln to obtain a heat-resistant porcelain body;

[0018] The heat-resistant porcelain body has a water absorption rate of 0.5, a thermal stability of 500-20°C and no cracking after secondary heat exchange, and the content...

Embodiment 2

[0020] (1) According to the mass percentage of the raw materials of the heat-resistant porcelain body: 36% cooked talc, 18% alumina powder, 28% clay, 18% feldspar, plus 8% calcium sulfate nanofiber additive;

[0021] (2) According to the batching, ball milling, fineness detection, pulping, sieving and iron removal, adding nanofiber additives and stirring evenly, pressing and squeezing mud, refining mud, aging, and refining mud, the time of ball milling process is 16 hours , the fineness test is passed through a 250-mesh sieve, the sieve residue is 0.8%, and the stale time is 5 days;

[0022] (3) Dry the rolled body at 45°C, trim it, and then burn it to 1260°C for 12 hours, keep it warm for 60 minutes, cool it down to room temperature and leave the kiln to obtain a heat-resistant porcelain body;

[0023] The heat-resistant porcelain body has a water absorption rate of 0.5, a thermal stability of 500-20°C and no cracking after secondary heat exchange, and the contents of lead an...

Embodiment 3

[0025] (1) According to the mass percentage of the raw materials of the heat-resistant porcelain body: 38% cooked talc, 25% alumina powder, 25% clay, 12% feldspar, plus 10% calcium sulfate nanofiber additive;

[0026] (2) According to the batching, ball milling, fineness detection, pulping, sieving and iron removal, adding nanofiber additives and stirring evenly, pressing and squeezing mud, refining mud, aging, and refining mud, the time of ball milling process is 16 hours , the fineness test is passed through a 250-mesh sieve, the sieve residue is 0.6%, and the stale time is 5 days;

[0027] (3) Dry the rolled body at 45°C, trim it, and then burn it to 1260°C for 12 hours, keep it warm for 60 minutes, cool it down to room temperature and leave the kiln to obtain a heat-resistant porcelain body;

[0028] The heat-resistant porcelain body has a water absorption rate of 0.5, a thermal stability of 450-20° C. without cracking after secondary heat exchange, and the contents of lea...

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Abstract

The invention discloses medium temperature sintered cordierite heat-resistant porcelain and a preparation method thereof. A heat-resistant porcelain rough body is prepared from, by mass, 35-40% of high-temperature sintered talc, 15-30% of alumina powder, 20-30% of clay, 10-20% of feldspar and 5-10% of calcium sulfate nanofiber additive. The preparation method comprises the steps that bisque firing is carried out to 1260 DEG C for 12 h after compounding, ball grinding, fineness detection, discharging, screening for removing iron, additive adding, even stirring, filter pressing and squeezing mud, pugging, aging, mud refining, forming, drying and fettling are carried out, the temperature is kept for 60 min, cooling is performed, and then a heat-resistant porcelain bisque can be obtained. The problems that existing cordierite heat-resistant porcelain is high in bisque synthesis temperature, long in sintering is long and poor in heat stability are solved. The production method is scientific, reasonable and easy to implement, the yield is high, product quality is good, the sintering period can be greatly shortened, the product heat stability is improved, and the market prospect is wide.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials (ceramics), and in particular relates to a medium-temperature sintered cordierite heat-resistant porcelain and a preparation method thereof. Background technique [0002] Cordierite material has the characteristics of low thermal expansion coefficient, good thermal shock resistance and strong corrosion resistance, and is widely used in various kiln insulation materials, automobile exhaust purifiers, catalyst carriers, etc. There are very few research reports on the preparation of heat-resistant porcelain (such as household cookware, etc.). Ren Liqin and others used artificially synthesized cordierite to prepare cordierite heat-resistant pots (see "Chinese Ceramics" Vol.43, No.1, Jan.2007, P48), but failed to fundamentally solve the problem of high synthesis temperature of cordierite materials. , Long firing time and other issues. Contents of the invention [0003] The technical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195
Inventor 盖曰贵王孝文
Owner 景德镇市大瓷庄瓷业有限公司
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