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A kind of preparation method of aluminum nitride/boron nitride composite ceramic powder

A composite ceramic and boron nitride technology, applied in the direction of nitrogen-metal/silicon/boron binary compounds, can solve the problems of high cost, complex preparation method and process, and achieve the effects of low cost, short process flow and simple equipment

Active Publication Date: 2017-03-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The preparation method of the above-mentioned method is complicated in technology and high in cost

Method used

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  • A kind of preparation method of aluminum nitride/boron nitride composite ceramic powder
  • A kind of preparation method of aluminum nitride/boron nitride composite ceramic powder

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Experimental program
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Effect test

Embodiment 1

[0022] Weigh 0.1 mole of aluminum nitrate, 0.1 mole of urea, 0.05 mole of nitric acid, 0.01 mole of boric acid, and 0.2 mole of glucose, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained. The precursor powder is reacted at 1500°C under a nitrogen atmosphere for 2 hours, and the reacted powder is heated in air at 550°C for 2 hours. , to obtain aluminum nitride / boron nitride composite powder.

Embodiment 2

[0024] Weigh 0.1 mole of aluminum nitrate, 0.12 mole of urea, 0.2 mole of nitric acid, 0.02 mole of boric acid, and 0.15 mole of glucose, dissolve various raw materials in distilled water to prepare a solution, and place the solution on a temperature-controllable electric furnace for heating. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained. The precursor powder is reacted at 1550°C and nitrogen atmosphere for 2 hours, and the reacted powder is heated in the air at 600°C for 1.5 hours. , to obtain aluminum nitride / boron nitride composite powder.

Embodiment 3

[0026] Weigh 0.1 mole of aluminum nitrate, 0.1 mole of urea, 0.03 mole of nitric acid, 0.01 mole of boric acid, and 0.13 mole of glucose, dissolve various raw materials in distilled water to prepare a solution, and heat the solution on a temperature-controllable electric furnace. After the solution undergoes a series of reactions such as volatilization, concentration, and decomposition, the precursor powder is obtained. The precursor powder is reacted at 1500°C under a nitrogen atmosphere for 2 hours, and the reacted powder is heated in air at 550°C for 2 hours. , to obtain aluminum nitride / boron nitride composite powder.

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Abstract

The invention discloses a preparation method of aluminum nitride / boron nitride composite ceramic powder, and belongs to the technical field of preparation of ceramic powder. The preparation method comprises the following specific steps of with aluminum source, boron source, amine organism, waters soluble carbon source and assistant agent as raw materials, preparing a solution according to a certain ratio, heating and stirring, volatilizing and concentrating the solution, and reacting to obtain precursor powders; reacting the precursor powders for 2-4h in a flowing nitrogen atmosphere at 1300-1700 DEG C, heating the reacted powders for 1-3h in air at 500-650 DEG C so as to obtain the aluminum nitride / boron nitride composite ceramic powder. The preparation method is applicable for synthesizing high-purity high-dispersion and high fine granularity under a lower reaction temperature condition, the operation is simple, the cost is low, and the industrial production is prompted.

Description

technical field [0001] The invention belongs to the technical field of ceramic powder preparation, and in particular relates to a method for producing aluminum nitride / boron nitride composite ceramic powder. Background technique [0002] Aluminum nitride (AlN) is a new type of ceramic with excellent comprehensive properties. The theoretical thermal conductivity of aluminum nitride can reach 320W·m -1 ·K -1 , is the traditional substrate material Al 2 o 3 10 to 15 times that of polycrystalline AlN, the thermal conductivity of the actually prepared polycrystalline AlN can reach 100-260W·m -1 ·K -1 , the thermal conductivity at room temperature is A1 2 o 3 5 to 10 times that of BeO (theoretical thermal conductivity is 350W m -1 ·K -1 ). And aluminum nitride also has a series of excellent properties such as low dielectric constant, reliable electrical insulation, high temperature resistance, corrosion resistance, non-toxicity, good mechanical properties, and a thermal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/06C04B35/582C04B35/626
Inventor 秦明礼吴昊阳贾宝瑞陈鹏起鲁慧峰曲选辉
Owner UNIV OF SCI & TECH BEIJING
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