摘要
首次采用氨解草酸氧钒（VOC2O4·H2O）前驱体的方法成功制备出了平均粒径50nm左右的立方相VN粉体.通过X射线衍射测试分析了温度、时间和氨气流量对氮化钒形成的影响。用透射电镜（TEM）观察和分析了氮化钒粉体的形貌和结构。实验结果表明，在600-850℃前驱体均能氨解戌VN，随氨解温度的升高，VN形成的时间显著缩短，750℃的温度下，10min就可以氨解完全。氨气流量可控制在40ml／min以上，表明该方法具有氨解温度低、氨气流量少和产物纯度高的特点。
Cubic vanadium nitride nanopowder with about 50nm size has been synthesized from ammonolysis of VOC2O4·H2O for the first time in this paper. Through X-ray diffraction （XRD）, the article makes an analysis of the effect of ammonolysis conditions such as temperature, holding time and ammonia flow on formation of VN. The morphology and crystal structure of VN nanopowder is studied by TEM. The results show that VN can be synthesized at the range of 600-850℃ and the ammonolysis time can be shortened significantly when the ammonolysis temperature is raised. VOC2O4·H2O can be ammonolized fully at 750℃ for 10 min and ammonia flow over 40ml/min should be controlled. Experiment results indicate that this kind of method for preparing VN nanopowder has the characters of low temperature, lower ammonia flow and pure product.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A06期2112-2113,共2页
Journal of Functional Materials
关键词
氮化钒
纳米材料
氨解
vanadium nitride
nano-material
ammonolysis
