文献类型：期刊文献

英文题名：Preparation of Nano Aln Powder by Sol Gel Foaming and its Sintering Properties

作者：Liu, Mengyang[1]; Wang, Shuangshuang[1]; Li, Sifang[1]; Liu, Chengwei[1]; Luo, Shuaiou[1]; Wang, Deqiang[1]

机构：[1] Key Laboratory for Ultrafine Materials, Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220196211)

语种：英文

外文关键词：Aluminum chloride - Aluminum nitride - Aluminum oxide - III-V semiconductors - Molar ratio - Nitrates - Nitrides - Nitrogen - Particle size - Sintering - Sol-gel process - Sols

摘要：Uniformly dispersed nano-sized aluminum nitride powders were prepared by sol-gel foaming method, using aluminum nitrate as the aluminum source, sucrose as the carbon source, and ammonium chloride as the foaming agent. The effects of ammonium chloride contents on the particle size and the sintering properties of aluminum nitride were investigated. The results showed that with the molar ratio of ammonium chloride to aluminum nitrate (N/Al) = 0.5, the colloidal foams were uniform, large and fluffy, and the amorphous alumina precursors with uniform particles could be prepared. The aluminum nitride powder with particle size of 20-30nm can be obtained by calcining these precursors in nitrogen atmosphere at 1400 °C for 2h. At the same time, aluminum nitride bulk material with relative density of 95% can be obtained by sintering in nitrogen atmosphere at 1700 °C for 2h. ? 2022, The Authors. All rights reserved.