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AssigneeNational Chung Shan Institute of Science and Technology
InventorsKuan-Ting Lai, Chi-Shiung Hsi, Min-Yu Yang
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A method of preparing aluminum nitride powder through atmosphere controlled carbon-thermal reduction. It relates to a chemical dilution method to wrap the carbon material evenly around the surface of γ-aluminum oxide (gamma phase-aluminum oxide). The method includes the following processes of: material mixing, carbonization, carbon-thermal reduction, and de-carbonization. Wherein, γ-aluminum oxide and phenolic resin are mixed to form a solution, and after the solution is baked and dried into powder, it is carbonized under nitridation atmosphere in high temperature. Then, carbon-thermal reduction is performed in a temperature of 1400° C.˜1700° C. Finally, de-carbonized is performed in air. In the process of carbon-thermal reduction, ammonia gas and hydrogen gas are added to regulate the reacting atmosphere. Also, urea is added to increase the nitridation reaction of aluminum.
A method of preparing aluminum nitride powder through atmosphere controlled carbon-thermal reduction, comprising following steps:
A method of preparing aluminum nitride powder through atmosphere controlled carbon-thermal reduction, comprising following steps:
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