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[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab forUltrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：20

期号：4

起止页码：2261

外文期刊名：INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY

收录：;EI(收录号：20230813622161);WOS:【SCI-EXPANDED(收录号:WOS:000937455300001)】；

语种：英文

外文关键词：AlN powder; nitridation; sinter; sol-gel; solution foaming method

摘要：Uniformly dispersed nano-sized aluminum nitride powders were prepared by the 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 content on the particle size and the sintering properties of aluminum nitride were investigated. The results showed that when the molar ratio of ammonium chloride to aluminum nitrate was .5, the colloidal foams were uniform, large, and fluffy, and amorphous alumina precursors with uniform particles could be prepared. Aluminum nitride powder with a particle size of 22-27 nm can be obtained by calcining these precursors in nitrogen atmosphere at 1400 degrees C for 2 h. At the same time, aluminum nitride bulk material with a relative density of 95% can be obtained by sintering the compact samples in nitrogen atmosphere at 1700 degrees C for 2 h.