A silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials and its preparation method

A technology for silicon nitride whiskers and natural minerals, applied in the field of ceramic materials, can solve the problems of low product yield, high raw material cost, and high product cost, and achieve the effects of wide distribution, lower product cost, and improved yield

Active Publication Date: 2022-04-15
JINGDEZHEN CERAMIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of material system generally has problems such as high raw material cost, uneven mixing, and uneven performance.
Even if some studies have adopted the method of in-situ synthesis of whiskers to introduce raw materials such as silicon nitride, the aluminum source and silicon source are still selected as industrial-grade raw materials, which not only has high product costs, but is also difficult to shape and low product yield.

Method used

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  • A silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials and its preparation method
  • A silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials and its preparation method

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Effect test

Embodiment 1

[0023] 1. In this embodiment, a silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material utilizing natural minerals as raw materials, including a base material and a binder, the base material is composed of andalusite (80 mesh) 30wt% , Kaolin (250 order) 35wt%, metal aluminum powder (180 order) 30wt%, metal silicon powder (325 order) 5wt%, binding agent is the PVA solution of water and concentration 5wt%, and its consumption is 2wt% of base material respectively and 8wt%.

[0024] 2. In this embodiment, a method for preparing a silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials is as follows:

[0025] After mixing the above-mentioned base materials, add a binder and mix them evenly; after stirring and trapping the materials, select an appropriate pressure according to the size of the product for compression molding, and dry at a temperature of 110°C to obtain a green body (moi...

Embodiment 2

[0027] 1. In this embodiment, a silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals in situ as raw materials, including a base material and a binder, the base material is composed of spherical soil (325 mesh) 15wt%, bauxite (180 mesh) 50wt%, metal aluminum powder (100 mesh) 30wt%, metal silicon powder (700 mesh) 5wt%, binder is water and dextrin, and its consumption is 6wt% of base material respectively and 0.5 wt%.

[0028] 2. In this embodiment, a method for preparing a silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials is as follows:

[0029] After mixing the above-mentioned base materials, add a binder and mix them evenly; after stirring and trapping the materials, select an appropriate pressure according to the size of the product for compression molding, and dry at a temperature of 110°C to obtain a green body (moisture content in the kiln < 1...

Embodiment 3

[0031] 1. In this embodiment, a silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material utilizing natural minerals as raw materials, including a base material and a binder, the base material is composed of kaolin (250 mesh) 35wt%, Andalusite (100 mesh) 40wt%, metal aluminum powder (700 mesh) 15wt%, metal silicon powder (325 mesh) 10wt%, binder is waste paper slurry, and its consumption is 6wt% of base material.

[0032] 2. In this embodiment, a method for preparing a silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials is as follows:

[0033] After mixing the above-mentioned base materials, add a binder and mix them evenly; after stirring and trapping the materials, select an appropriate pressure according to the size of the product for compression molding, and dry at a temperature of 110°C to obtain a green body (moisture content in the kiln < 1%); then Embedding silicon nitri...

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Abstract

The invention discloses a silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials, including a base material and a binder, and the base material is composed of aluminosilicate mineral 65- 85 wt%, metal aluminum powder 10-30 wt%, metal silicon powder 5-10 wt%, and the amount of the binder is 6-12 wt% of the base material. In addition, a method for preparing the silicon nitride whisker-aluminum nitride-corundum ternary composite ceramic material using natural minerals as raw materials is also disclosed. The present invention uses natural aluminosilicate mineral-metal aluminum powder-metal silicon powder as the raw material system, and introduces silicon nitride whiskers, aluminum nitride and corundum through in-situ synthesis, which not only saves raw material costs, but also simplifies the preparation process , and effectively solve the problem of difficult mixing of industrial powder and aggregate in the prior art, improve the quality and performance of corundum-based composite ceramic materials, and are conducive to popularization and application and progress and development of industry technology.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a silicon nitride whisker-aluminum nitride-corundum composite ceramic material and a preparation method thereof. Background technique [0002] Corundum ceramics is a widely used material, featuring high strength, good corrosion resistance, and high refractoriness, and can be used for high-temperature applications such as crucibles and roller tables. However, corundum ceramics have disadvantages such as high thermal expansion coefficient, poor toughness, and poor thermal shock resistance, so when they are used as high-temperature structural ceramics, their dimensions are limited to a certain extent. This is because the larger the size, the less resistant the material is to thermal shock. Silicon nitride and aluminum nitride have the advantages of high thermal conductivity, low expansion and high thermal shock resistance, which can just make up for the lack of performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/81
CPCC04B2235/3873C04B2235/3865C04B2235/3217C04B2235/5276C04B2235/349C04B2235/3463C04B2235/3427C04B2235/402C04B2235/428C04B2235/9615C04B2235/9607C04B2235/96
Inventor 劳新斌徐笑阳江伟辉梁健
Owner JINGDEZHEN CERAMIC UNIV
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