无机材料学报2017，Vol.32Issue(10)：1115-1120,6.DOI:10.15541/jim20170067
泡沫前驱体碳热还原氮化法合成氮化铝粉体
Synthesis of AlN Powder by Carbothermal Reduction-nitridation of Alumina/Carbon Black Foam
茅茜茜 1李军 2张海龙 3徐勇刚 1王士维2
作者信息
- 1. 中国科学院 上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海 200050
- 2. 中国科学院 上海硅酸盐研究所, 中国科学院光功能无机材料重点实验室, 上海 200050
- 3. 中国科学院大学, 北京 100039
- 折叠
摘要
Abstract
Alumina/carbon black foam was prepared by mechanical foaming and aqueous gelcasting and used as precursor for the production of AlN powder. The foam with large open pores ensures homogeneous solid-gas reaction during carbothermal reduc-tion-nitridation (CRN) process. Further, the solid-gas contact is enlarged by oppositely feeding the foam and nitrogen in a vertical furnace. Solid-gas reaction efficiency of the CRN process was greatly enhanced when total porosity of the foam was ≥80%. XRD results revealed that γ-Al2O3transformed to α-Al2O3and then was carbothermal reduction-nitridationed to be AlN phase. AlN pow-der with an average particle size of less than 1 μm was synthesized at 1650℃ and contained 32.9wt% nitrogen.关键词
化学制备/孔隙率/碳热还原/氮化铝Key words
chemical preparation/porosity/carbothermal reduction/aluminum nitride分类
化学化工引用本文复制引用
茅茜茜,李军,张海龙,徐勇刚,王士维..泡沫前驱体碳热还原氮化法合成氮化铝粉体[J].无机材料学报,2017,32(10):1115-1120,6.
