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A kind of Sialon whisker-corundum composite ceramic material using natural minerals as raw material, its preparation method and the prepared product

A technology of composite ceramics and natural minerals, which is applied in the field of ceramic materials, can solve the problems of low product yield, difficulty in forming, and high product cost, and achieve the effects of wide distribution, increased yield, and improved performance

Active Publication Date: 2022-05-20
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if the Sialon whisker is introduced by in-situ synthesis, the corundum is still made of industrial-grade raw materials, which not only has high product cost, but is also difficult to shape, and the product yield is low.

Method used

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  • A kind of Sialon whisker-corundum composite ceramic material using natural minerals as raw material, its preparation method and the prepared product
  • A kind of Sialon whisker-corundum composite ceramic material using natural minerals as raw material, its preparation method and the prepared product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. This embodiment is a Sialon whisker-corundum composite ceramic material using natural minerals as raw materials, including a base material and a binder. in:

[0025] The raw material of base material is composed of aluminosilicate mineral 64wt% (wherein andalusite (80 orders of particle size) 34wt%, kaolin (250 orders of particle size) 30wt%), metal aluminum powder (180 orders of particle size) 30wt%, metal silicon powder ( particle size (100 mesh) 5wt%, aluminum fluoride 1wt%. The binder is prepared by mixing water and a 5wt% PVA solution (according to a mass ratio of 1:1), and its dosage is 8wt% of the base material.

[0026] 2, the present embodiment utilizes natural mineral as the preparation method of the Sialon whisker-corundum composite ceramic material of raw material, and its steps are as follows:

[0027] (1) After mixing the above-mentioned base materials according to the proportion, add a binder and mix evenly. After stirring and trapping the materials,...

Embodiment 2

[0030] 1. This embodiment is a Sialon whisker-corundum composite ceramic material using natural minerals as raw materials, including a base material and a binder. in:

[0031] The raw material composition of the base material is 60wt% of aluminosilicate minerals (including 10wt% of ball clay (325 meshes in particle size), 50wt% of bauxite (180 meshes in particle size), 17wt% of metal aluminum powder (100 meshes in particle size), 17wt% of metal silicon powder (700 mesh particle size) 20wt%, aluminum fluoride 3wt%. The binding agent is formed by mixing water and dextrin (according to the mass ratio of 1:1), and its dosage is 6wt% of the base material.

[0032] 2, the present embodiment utilizes natural mineral as the preparation method of the Sialon whisker-corundum composite ceramic material of raw material, and its steps are as follows:

[0033] (1) After mixing the above-mentioned base materials according to the proportion, add a binder and mix evenly. After stirring and t...

Embodiment 3

[0036] 1. This embodiment is a Sialon whisker-corundum composite ceramic material using natural minerals as raw materials, including a base material and a binder. in:

[0037] The raw material of the base material consists of 75wt% of aluminosilicate minerals (wherein kaolin (250 orders of particle size) 35wt%, andalusite (100 orders of particle size) 40wt%), metal aluminum powder (700 orders of particle size) 13wt%, metal silicon powder ( particle size 325 mesh) 10wt%, aluminum fluoride 2wt%. The binding agent is waste paper slurry, and its dosage is 6wt% of the base material.

[0038] 2, the present embodiment utilizes natural mineral as the preparation method of the Sialon whisker-corundum composite ceramic material of raw material, and its steps are as follows:

[0039] (1) After mixing the above-mentioned base materials according to the proportion, add a binder and mix evenly. After stirring and trapping the materials, select an appropriate pressure according to the siz...

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Abstract

The invention discloses a Sialon whisker-corundum composite ceramic material using natural minerals as raw materials, including a base material and a binder; the base material is composed of 60-80 wt% of aluminosilicate minerals, metal aluminum powder 10-30 wt%, metal silicon powder 5-20 wt%, aluminum fluoride 1-3 wt%; the amount of the binder is 6-12 wt% of the base material. In addition, the preparation method and the prepared product of the above-mentioned Sialon whisker-corundum composite ceramic material using natural minerals as raw materials are also disclosed. The present invention uses natural aluminosilicate mineral-metal aluminum powder-metal silicon powder-aluminum fluoride as the raw material system, and introduces sialon whiskers and corundum through in-situ synthesis, which not only saves raw material costs, but also simplifies the preparation process. Moreover, the problem that the prior art industrial powder and aggregate are not easy to mix is ​​effectively solved, and the performance of the corundum-based composite ceramic material is improved. The invention is of great significance for improving the quality of the corundum-based composite ceramic material and saving product costs, and is beneficial to popularization and application and the progress and development of industry technology.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a sialon whisker-corundum composite ceramic material, a preparation method thereof, and a prepared product. Background technique [0002] Corundum ceramics have the characteristics of high high-temperature strength, good chemical stability, and high refractoriness, and can be used for high-temperature applications such as crucibles and ceramic roller tables. However, due to the high thermal expansion coefficient of corundum ceramics, its resistance to rapid cooling and rapid heating is poor, and its sintered body has poor toughness, which limits its application range. The Sialon whisker has the advantages of high thermal conductivity, low expansion and high thermal shock resistance, which can just make up for the lack of performance of corundum ceramics. Therefore, the Sialon whisker-corundum composite ceramic material combines the advantages of the two composite ceram...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/5276C04B2235/6581C04B2235/6567C04B2235/96C04B2235/9607C04B2235/9615Y02P40/60
Inventor 劳新斌徐笑阳涂治江伟辉梁健苗立锋吴倩虞澎澎包镇红
Owner JINGDEZHEN CERAMIC UNIV
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