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Preparation method of ceramic with high densification and low thermal expansion

A low thermal expansion, ceramic preparation technology, applied in the field of ceramic materials, to achieve the effect of good compactness, easy industrialization, and simple preparation process

Active Publication Date: 2017-08-11
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most research reports are about the synthesis of cordierite materials from natural raw materials, but there are few reports on the direct sintering of high-purity oxides to synthesize cordierite

Method used

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  • Preparation method of ceramic with high densification and low thermal expansion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Put high-purity magnesium oxide, aluminum oxide and silicon oxide powder into cordierite (2MgO·2Al 2 o 3 ·5SiO2 2 ) Theoretical stoichiometric ratio ingredients, uniformly mixed under the action of alcohol medium and grinding balls, dried, manually granulated after cold isostatic pressing, passed through a 60# sieve, and synthesized high-purity cordierite under the sintering process at 1420°C and heat preservation for 2 hours pink.

[0033] (2) Weigh 84% cordierite high-purity powder (cordierite clinker), 15% cordierite raw meal, and 1% sintering aid Y by mass percentage 2 o 3 , and 1% dispersant (water-soluble Acryl-based dispersant T61).

[0034] (3) Place the configured raw materials in an alcohol solution and perform ball milling under the action of grinding balls.

[0035] (4) Place the uniformly mixed slurry in a drying oven to dry at a drying temperature of 80°C. After drying, add a binder with a weight percentage of 2% of the raw material and grind it g...

Embodiment 2

[0040] (1) Put high-purity magnesium oxide, aluminum oxide and silicon oxide powder into cordierite (2MgO·2Al 2 o 3 ·5SiO2 2 ) Theoretical stoichiometric ratio ingredients, uniformly mixed under the action of alcohol medium and grinding balls, dried, manually granulated after cold isostatic pressing, passed through a 60# sieve, and synthesized high-purity cordierite under the sintering process at 1420°C and heat preservation for 2 hours pink.

[0041] (2) Weigh 83% cordierite high-purity powder (cordierite clinker), 15% cordierite raw meal, and 2% sintering aid Y by mass percentage 2 o 3 , and 1% dispersant (water-soluble Acryl-based dispersant T61).

[0042] (3) Place the configured raw materials in an alcohol solution and perform ball milling under the action of grinding balls.

[0043] (4) Place the uniformly mixed slurry in a drying oven to dry at a drying temperature of 80°C. After drying, add a binder with a weight percentage of 2% of the raw material and grind it g...

Embodiment 3

[0048] (1) Put high-purity magnesium oxide, aluminum oxide and silicon oxide powder into cordierite (2MgO·2Al 2 o 3 ·5SiO2 2 ) Theoretical stoichiometric ratio ingredients, uniformly mixed under the action of alcohol medium and grinding balls, dried, manually granulated after cold isostatic pressing, passed through a 60# sieve, and synthesized high-purity cordierite under the sintering process at 1425°C and heat preservation for 2 hours pink.

[0049] (2) Weigh 83% cordierite high-purity powder (cordierite clinker), 15% cordierite raw meal, and 2% sintering aid Y by mass percentage 2 o 3 , and 1% dispersant (water-soluble Acryl-based dispersant T61).

[0050] (3) Place the configured raw materials in an alcohol solution and perform ball milling under the action of grinding balls.

[0051](4) Place the uniformly mixed slurry in a drying oven to dry at a drying temperature of 80°C. After drying, add a binder with a weight percentage of 2% to 4% of the raw material, grind it...

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Abstract

The invention relates to a preparation method of ceramic with high densification and low thermal expansion. The preparation method is characterized by comprising the following steps: (1) cordierite high purity powder is synthesized by sintering; (2) raw materials are prepared from cordierite high purity powder, cordierite raw materials, sintering aids and dispersants; (3) slurry is prepared from the raw materials by ball milling, dried and prilled; (4) samples are formed and sintered to obtain the end low-thermal-expansion high-densification-cordierite ceramic. Compared with the prior art, the preparation method has the advantages that the prepared low-thermal-expansion ceramic material has good density which is up to 96%, and has a better mechanical property; the whole preparation process is simple, easy to operate and low cost, thereby industrialization is easy to realize.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a cordierite ceramic material, which can be used as a kiln material and a high-temperature-resistant filter material. Background technique [0002] As we all know, cordierite ceramics have low thermal expansion coefficient and dielectric constant, and are widely used as kiln materials, filter materials for high-temperature gases and liquids, catalysis and purification carriers for automobile exhaust, and electronic packaging materials. Components with strict requirements on thermal shock performance and dielectric properties, especially precision semiconductor components. [0003] At present, there are two main methods for preparing cordierite materials: one is the synthesis of cordierite by natural mineral high-temperature solid-state reaction, that is, using natural mineral raw materials to synthesize cordierite at high temperature; the other is high-purity solid-state reaction synthesis o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/622
CPCC04B35/195C04B35/622C04B2235/3206C04B2235/3217C04B2235/3225C04B2235/3418C04B2235/9607
Inventor 张丛曹剑武燕东明李志鹏郭建斌乔光利史秀梅高晓菊王志伟林广庆满蓬贾书波王静慧杨双燕李康常永威曲俊峰赵斌李国斌王成
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH