Low-expansion ceramic billet as well as preparation method and application thereof

A low-expansion, ceramic billet technology, applied in the field of ceramic materials, can solve the problems of high equipment cost, narrow application range, and low production efficiency

Active Publication Date: 2018-03-13
湖南嘉盛电陶新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, cordierite is a substitute for spodumene and petalite, and its application has great limitations: if the thermal expansion coefficient of ceramic products is to meet the standard of low expansion, the proportion of cordierite in the ceramic blank must be The proportion of plastic clay in the ceramic blank reaches more than 65%, which leads to th

Method used

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  • Low-expansion ceramic billet as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare raw materials, respectively weigh 15kg of cordierite, 20kg of petalite, 20kg of talc, 4kg of mullite and 41kg of kaolin, wherein the particle size of cordierite and petalite raw materials is 40 mesh, talc, mollite The particle size of the stone and kaolin raw materials is 200 mesh.

[0038] Put the raw materials of talc, mullite and kaolin into the ball mill, add 65kg of grinding balls and 117kg of water at the same time, carry out wet grinding, and test the slurry with a particle size analyzer. When the D97 in the particle size distribution in the slurry reaches 12μm, that is A primary billet was produced.

[0039] Add cordierite and lithium petalite raw materials to the primary billet, add 35kg of grinding balls and 63kg of water at the same time, continue wet grinding, and test the slurry with a particle size analyzer; when the D97 in the particle size distribution in the slurry reaches 60μm , Stop ball milling to get low expansion ceramic blank.

[0040] S...

Embodiment 2

[0049] Basically the same as Example 1, the difference is:

[0050] The raw materials include 20kg of cordierite, 16kg of petalite, 16kg of talc, 7kg of mullite, 40kg of kaolin and 1kg of spodumene, wherein the particle size of cordierite and petalite is 80 mesh, and talc The particle size of mullite and kaolin is 325 mesh, and the particle size of spodumene is 100 mesh. During wet ball milling, the D97 of the particle size distribution of the particles in the primary blank reached 15 μm, and the D97 of the particle size distribution of the particles in the low expansion ceramic blank reached 80 μm. The temperature of glaze firing is 1250 ℃, and the time is 2.5 hours.

Embodiment 3

[0052] Basically the same as Example 1, the difference is:

[0053] The raw materials include 18kg of cordierite, 17kg of petalite, 18kg of talc, 4kg of mullite, 42kg of kaolin and 1kg of spodumene, wherein the particle size of cordierite and petalite raw materials is 60 mesh, The particle size of talc, mullite and kaolin raw materials is 250 mesh, and the particle size of spodumene is 60 mesh. During the wet ball milling, the D97 of the particle size distribution of the particles in the primary blank reached 13 μm, and the D97 of the particle size distribution of the particles in the low expansion ceramic blank reached 70 μm. The temperature of glaze firing is 1250 DEG C, and the time is 3.5 hours.

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Abstract

The invention provides a preparation method of a low-expansion ceramic billet. The preparation method comprises the following steps: providing the following raw materials in percentage by weight: 15 to 20 percent of cordierite, 16 to 20 percent of petalite, 16 to 20 percent of talc, 4 to 7 percent of mullite and 40 to 43 percent of kaolin; carrying out wet ball grinding on the talc, the mullite, the kaolin and a solvent, thus preparing an initial billet with particle size distribution D97 being 12 to 15 micrometers; carrying out wet ball grinding on the cordierite, the petalite and the initialbillet, thus preparing the low-expansion ceramic billet with particle size distribution D97 being 60 to 80 micrometers. According to the preparation method, the use amount of the petalite is reduced,and the raw material cost is reduced; furthermore, the prepared low-expansion ceramic billet is applicable to relatively-low-cost rolling forming of equipment, but not limited to isostatic forming.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a low-expansion ceramic blank and its preparation method and application. Background technique [0002] Ceramic materials are divided into three categories according to their thermal expansion coefficient α: high expansion type, medium expansion type and low expansion type. Among them, the thermal expansion coefficient α of the low expansion type is <2×10 -6 ·℃ -1 . Low-expansion ceramics have excellent performance in thermal shock resistance and are widely used, so the development of low-expansion ceramics is of great significance. [0003] Traditional low-expansion ceramics use spodumene or petalite as the main raw material. With the increasing output of lithium batteries, the supply of lithium ores such as spodumene and petalite is becoming increasingly tight, and the price of lithium ore is also increasing rapidly. The cost of raw materials for traditional low...

Claims

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Application Information

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IPC IPC(8): C04B33/13C04B35/626
CPCC04B33/13C04B35/6261C04B2235/3445C04B2235/3472C04B2235/3481C04B2235/5436C04B2235/602C04B2235/606C04B2235/612C04B2235/656C04B2235/6567C04B2235/9607
Inventor 李晓婷袁家俭曹阿顺
Owner 湖南嘉盛电陶新材料股份有限公司
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