摘要
Tantalum nitride powders with particle size of 20-50 nm were prepared by the homogeneous reduction in liquid ammonia,and were treated at the temperature range from 500 ℃ to 1 170 ℃. The results of XRD analysis indicate that the powders heated up to 500 ℃ are in the form of amorphous. The powder heated at 600 ℃ tends to transform into crystal,the powder heated to temperatures higher than 700 ℃ is clearly of crystal. The results of surface area analysis by BET show that the surface area of the powder increases as the heating temperature increases,and reaches a maximum value of 21.8 m2/g at the heating temperature around 700 ℃.
Tantalum nitride powders with particle size of 20--50 nm were prepared by the homogeneous reduction in liquid ammonia, and were treated at the temperature range from 500℃ to 1 170℃. The results of XRD analysis indicate that the powders heated up to 500℃ are in the form of amorphous. The powder heated at 600℃ tends to transform into crystal, the powder heated to temperatures higher than 700℃ is clearly of crystal. The results of surface area analysis by BET show that the surface area of the powder increases as the heating temperature increases, and reaches a maximum value of 21.8 m^2/g at the heating temperature around 700℃.
出处
《中国有色金属学会会刊：英文版》
CSCD
2007年第A01期556-559,共4页
Transactions of Nonferrous Metals Society of China
基金
Project(2003AA302430) supported by the National Hi-tech Research and Development Program of China
project(50374007) supported by the National Natural Science Foundation of China
关键词
钽
纳米技术
合金
物理性能
homogeneous reduction
tantalum nano powder
BET surface area analysis
