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Aluminum nitride ceramic composite material and preparation method thereof

A technology of aluminum nitride ceramics and composite materials, applied in the field of materials

Active Publication Date: 2015-03-11
潮州市礼升陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]First, the high temperature oxidation resistance of aluminum nitride ceramics is poor, and it is easy to absorb moisture and hydrolyze in the atmosphere and lose its excellent performance;
[0004] Second, the cost of preparation is relatively high, which is not conducive to long-term use
It can be seen that the technical solution is to add silicon nitride, silicon oxynitride, silicon dioxide and magnesium oxide on the basis of aluminum nitride raw materials to improve the strength and hardness of the composite ceramics, so that it has good wear resistance Performance and chemical corrosion resistance, but aluminum nitride ceramics itself has excellent performance, the added components only improve its superior performance, but there is not much attention to the high temperature oxidation resistance of composite ceramics, the material is not effective Addresses the shortcomings of aluminum nitride and, therefore, is not suitable for long-term use

Method used

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  • Aluminum nitride ceramic composite material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] An aluminum nitride ceramic composite material, comprising the following components in parts by mass:

[0026] 60 parts of aluminum nitride, 15 parts of nano-alumina, 8 parts of boron nitride, 15 parts of carbon fiber, 8 parts of nano-titanium oxide, 7 parts of nano-tin oxide, 6 parts of zirconia, 5 parts of cobalt powder and 12 parts of yttrium oxide.

[0027] According to the preparation method of the aluminum nitride ceramic composite material provided by the present invention, the above-mentioned composite material is prepared, and the steps are as follows:

[0028] (1) Accurately weigh each component in corresponding parts by mass;

[0029] (2) Mix each component evenly and put it into a ball mill for grinding until it is evenly mixed to obtain a mixed powder;

[0030] (3) Put the mixed powder into a high-temperature furnace for high-temperature and high-pressure calcination at a temperature of 1400°C and a pressure of 4.5GPa for 5 hours;

[0031] (4) After the c...

Embodiment 2

[0033] An aluminum nitride ceramic composite material, comprising the following components in parts by mass:

[0034] 35 parts of aluminum nitride, 10 parts of nano-alumina, 6 parts of boron nitride, 8 parts of carbon fiber, 3 parts of nano-titanium oxide, 3 parts of nano-tin oxide, 3 parts of zirconia, 2 parts of cobalt powder and 6 parts of yttrium oxide.

[0035] According to the preparation method of the aluminum nitride ceramic composite material provided by the present invention, the above-mentioned composite material is prepared, and the steps are as follows:

[0036] (1) Accurately weigh each component in corresponding parts by mass;

[0037] (2) Mix each component evenly and put it into a ball mill for grinding until it is evenly mixed to obtain a mixed powder;

[0038] (3) Put the mixed powder into a high-temperature furnace for high-temperature and high-pressure calcination at a temperature of 1400°C and a pressure of 3.5GPa for 6 hours;

[0039] (4) After the cal...

Embodiment 3

[0041] An aluminum nitride ceramic composite material, comprising the following components in parts by mass:

[0042] 45 parts of aluminum nitride, 12 parts of nano-alumina, 7 parts of boron nitride, 12 parts of silicon carbide fiber, 6 parts of nano-titanium oxide, 5 parts of nano-tin oxide, 5 parts of zirconia, 3 parts of cobalt powder and 11 parts of praseodymium oxide .

[0043] According to the preparation method of the aluminum nitride ceramic composite material provided by the present invention, the above-mentioned composite material is prepared, and the steps are as follows:

[0044] (1) Accurately weigh each component in corresponding parts by mass;

[0045] (2) Mix each component evenly and put it into a ball mill for grinding until it is evenly mixed to obtain a mixed powder;

[0046] (3) Put the mixed powder into a high-temperature furnace for high-temperature and high-pressure calcination at a temperature of 1400°C and a pressure of 3.5GPa for 5 hours;

[0047]...

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Abstract

The invention relates to an aluminum nitride ceramic composite material and a preparation method thereof, and relates to the technical field of materials. The material comprises the following components, by mass: 35-60 parts of aluminum nitride, 10-15 parts of nano-scale aluminum oxide, 6-8 parts of boron nitride, 8-15 parts of reinforcing fiber ,3-8 parts of nano-scale titanium oxide, 3-7 parts of nano-scale tin oxide, 3-6 parts of zirconium oxide, 2-5 parts of cobalt powder and 6-12 parts of rare earth oxide. The aluminum nitride ceramic composite material preparation method comprises the steps of weighing, grinding, high-temperature solid, and cooling. According to the aluminum nitride ceramic composite material, material mechanical and electrical properties are improved, and an oxidative degeneration defect of aluminum nitride under high temperature is overcome through the comprehensive actions of nano particles, reinforcing fibers and rare earth elements, such that material service life is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an aluminum nitride ceramic composite material and a preparation method of the composite material. Background technique [0002] Aluminum nitride ceramics are ceramic materials in which aluminum nitride is the main crystal phase. Aluminum nitride AIN crystal is a covalent bond compound with tetrahedron as the structural unit. It has a wurtzite structure and belongs to the hexagonal crystal system. Because aluminum nitride powder has the characteristics of small particle size and high activity, the prepared aluminum nitride ceramics have excellent thermal conductivity, and have: (1) low expansion coefficient; (2) high strength; (3) high temperature resistance , chemical corrosion resistance; (4) high resistivity, low dielectric loss; (5) excellent wear resistance and other characteristics, but there are two problems: [0003] First, the high temperature oxidation r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/582C04B35/622
Inventor 刘莉王爽刘晓东
Owner 潮州市礼升陶瓷有限公司
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