公开(公告)号：US20160257568A1

公开(公告)日：2016-09-08

申请号：US14962741

申请日：2015-12-08

Applicant: National Chung-Shan Institute of Science and Technology

Inventor： Kuan-Ting Lai ,  Chi-Shiung Hsi ,  Min-Yu Yang

IPC: C01B21/072

CPC classification number: C01B21/0726 ,  C01P2002/72

Abstract: 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.

Abstract translation: 一种通过大气控制碳热还原制备氮化铝粉末的方法。 它涉及一种将碳材料均匀地包裹在γ-氧化铝（γ相 - 氧化铝）表面的化学稀释方法。 该方法包括以下方法：材料混合，碳化，碳热还原和脱碳。 其中，将γ-氧化铝和酚醛树脂混合形成溶液，将溶液烘干并干燥成粉末后，在高温氮化气氛中碳化。 然后，在1400℃〜1700℃的温度下进行碳热还原。最后，在空气中进行脱碳化。 在碳热还原过程中，加入氨气和氢气来调节反应气氛。 此外，加入尿素以增加铝的氮化反应。