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Aluminum nitride powder as well as preparation method and application thereof

A technology of aluminum nitride and powder, which is applied in the field of aluminum nitride powder and its preparation, can solve the problems of low purity of the synthetic product aluminum nitride powder, uneven mixing of raw materials, incomplete solid-gas reaction, etc. Achieve the effects of accelerating the nitriding reaction process, shortening the reaction time, and reducing the activation energy

Active Publication Date: 2021-10-01
NANCHONG THREE CIRCLE ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has problems such as uneven mixing of raw materials, incomplete solid-gas reaction, high nitriding reaction temperature, long reaction time and low loading capacity, resulting in low purity of the synthetic product aluminum nitride powder.

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  • Aluminum nitride powder as well as preparation method and application thereof

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preparation example Construction

[0031] In order to solve the problem of low purity of the aluminum nitride powder produced by the carbothermal reduction method in the prior art, the present invention uses activated carbon as the carbon source reducing agent, and uses the porogen to form the activated carbon into a nanostructure, thereby obtaining a three-dimensional porous structure. Precursor, the precursor is supported by the nano-activated carbon structure, and the aluminum element is uniformly dispersed in the pores of the nano-activated carbon structure, which not only makes the mixing of the aluminum element and the activated carbon more uniform, the resulting aluminum nitride has higher purity, but also makes the nano-activated carbon structure As a template for aluminum nitride, it imparts a nanostructure to aluminum nitride. Specifically, the preparation method of aluminum nitride powder of the present invention comprises the following steps:

[0032] performing a hydrothermal reaction on an aluminu...

Embodiment 1

[0061] Embodiment 1 provides a kind of preparation method of aluminum nitride powder, and this preparation method comprises the following steps:

[0062] (1) Add 50mL of ultrapure water to a reaction kettle with a lining volume of 100mL, then add aluminum nitrate, pitch coke activated carbon and potassium hydroxide, wherein the mass ratio of aluminum nitrate, pitch coke activated carbon and potassium hydroxide is aluminum nitrate: Pitch coke activated carbon: KOH=1:0.12:0.23 (potassium hydroxide: 0.8g), mix evenly, seal, keep warm at 150°C for 25 hours, then cool to room temperature to obtain the hydrothermal product;

[0063] (2) Heat the hydrothermal product to 100°C while stirring, and keep warm to evaporate the solution to dryness. This process takes about 20 hours to obtain nano-carbon supported Al 2 o 3 Precursor;

[0064] (3) Precursor, urea and ammonium molybdate are uniformly mixed according to the mass ratio of precursor: urea: ammonium molybdate=1:0.6:0.03, placed...

Embodiment 2

[0067] Embodiment 2 provides a kind of preparation method of aluminum nitride powder, and the difference of this preparation method and the preparation method of embodiment 1 is that the mass ratio of aluminum nitrate, pitch coke activated carbon and potassium hydroxide is aluminum nitrate: pitch coke activated carbon: KOH=1:0.24:0.45 (the amount of aluminum nitrate is the same as in Example 1). The aluminum nitride powder obtained in this example was made into a ceramic sintered body by the same method as in Example 1.

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Abstract

The invention discloses aluminum nitride powder as well as a preparation method and application thereof. The preparation method of the aluminum nitride powder is characterized in that the method comprises the following steps: enabling an aluminum source, activated carbon and a pore-foaming agent to be subjected to a hydrothermal reaction and obtaining a solid precursor is obtained, wherein the aluminum source is aluminum salt, and the pore-foaming agent is water-soluble hydroxide; and calcining the solid precursor and a nitrogen source to obtain the aluminum nitride powder. The activated carbon is used as a carbon source reducing agent, the pore-foaming agent is utilized to form a nano structure, the nano activated carbon structure not only can be used as a template for growth of nano aluminum nitride, but also can enable the aluminum element and the activated carbon to be mixed more uniformly, and the obtained aluminum nitride powder is higher in purity.

Description

technical field [0001] The invention belongs to the technical field of aluminum nitride materials, and relates to an aluminum nitride powder and its preparation method and application. Background technique [0002] With the rapid development of modern electronic technology, electronic devices as a whole are developing in the direction of miniaturization, light weight, high integration, high density, high power, and high reliability, and the structure of electronic devices is becoming more and more complex. Such a development trend Higher requirements are placed on the performance of substrates and packaging materials. [0003] Compared with the traditional ceramic materials alumina and beryllium oxide, the new ceramic material aluminum nitride (AlN) has high thermal conductivity, thermal expansion coefficient close to that of silicon, excellent electrical properties, high mechanical strength, and good chemical stability. Non-toxic, environmentally friendly, non-toxic, high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/072C04B35/582C04B35/626C04B35/622
CPCC01B21/0726C04B35/581C04B35/626C04B35/622C01P2004/62C01P2006/80C04B2235/3201C04B2235/3217C04B2235/422C04B2235/48
Inventor 陈烁烁江楠王高强
Owner NANCHONG THREE CIRCLE ELECTRONICS
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