摘要
以硝酸铝、尿素、蔗糖为原料低温热分解得到均匀分散的前驱体粉末 .对前驱体粉末的碳热还原过程研究表明 :不存在γ -Al2 O3α -Al2 O3晶型转变 ,因而AlN粉末的合成温度降低 .合成的AlN粉末粒径约 80～ 1 2 0nm ,比表面积 1 9.2m2 /g .脱碳后的AlN粉末氮的质量分数为 3 2 .3 % ,氧的质量分数为 2 .1 % ,碳的质量分数为 0 .2 % .
Aluminum nitride powder was synthesized by means of precursor which obtained by pyrolysis of solution mixture of aluminum nitrate, urea and cane_sugar. The precursor powder was a homogeneously mixture of Al 2O 3 and C composed of nano_sized particles. The result of investigation on the procedure of carbothermal reduction and nitridation shows that nitridation begins at lower reaction temperature of 1 300 ℃ and AlN powder is synthesized directly from γ -Al 2O 3 without transformation of γ -Al 2O 3 α -Al 2O 3. The AlN powder obtained has characteristics of 80～120 nm in grain size, 19.2 m 2/g in surface area and 32.3% , 2.1% and 0.2%(in mass) in N, O,C content respectively. The high oxygen content is resulted from the oxidation of AlN powder of high surface area during the procedure of removing carbon, which has been confirmed by XPS.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2000年第4期376-378,共3页
Journal of The Chinese Ceramic Society
关键词
氮化铝
热分解
前驱体
碳热还原氮化
粉末制备
aluminum nitride
pyrolysis
precursor
carbothermal reduction and nitridation
