How to synthesize aluminum nitride powder？

Aluminum Nitride (AlN) crystallizes in a hexagonal structure, typically appearing bluish-white in pure form but often gray or off-white in practice. As a high-performance advanced ceramic material, AlN boasts exceptional thermal conductivity, reliable electrical insulation, low dielectric constant and loss, non-toxicity, and a thermal expansion coefficient that matches silicon. These outstanding properties make it an ideal choice for next-generation high-integration semiconductor substrates and electronic packaging materials. Below is a brief introduction to the preparation of AlN.

Synthesis of AlN Powder

AlN powder serves as the foundational raw material for ceramic products. Its purity, particle size, oxygen content, and impurity levels significantly impact the thermal conductivity, sintering process, and forming techniques of the final product, ultimately determining its performance. Key methods for synthesizing AlN powder include:

1. Direct Nitridation Method
   Aluminum powder reacts with nitrogen gas at high temperatures (800°C–1200°C) to form AlN powder.

2. Carbothermal Reduction Method
   A mixture of alumina (Al₂O₃) and carbon powders undergoes reduction and nitridation in a flowing nitrogen atmosphere at elevated temperatures (1400°C–1800°C) to produce AlN powder.

3. Self-Propagating High-Temperature Synthesis (SHS)
   This method leverages the highly exothermic reaction between aluminum powder and nitrogen. Once ignited, the reaction sustains itself, rapidly synthesizing AlN.

4. Chemical Vapor Deposition (CVD)
   Volatile aluminum compounds react with nitrogen or ammonia gas, depositing AlN powder from the vapor phase. Depending on the aluminum source, CVD can be classified into inorganic (e.g., aluminum halides) and organic (e.g., alkyl aluminum) methods.

This advanced material is revolutionizing electronics with its superior properties—choose AlN for high-performance, reliable solutions in semiconductor and packaging applications!

Xiamen Juci Technology Co., Ltd. uses the carbothermal reduction method to prepare aluminum nitride powder. The synthesized powder has high purity, stable performance, fine and uniform particle size, and can be used to prepare high-grade powder.Xiamen Juci Technology, as a leading supplier of aluminum nitride powder in China, is committed to providing high-purity and high-grade aluminum nitride thermal management materials both at home and abroad.

Media Contact:
Xiamen Juci Technology Co., Ltd.

Phone: +86 592 7080230
Email: miki_huang@chinajuci.com

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