文献类型：期刊文章

作　　者：朱骏[1] 黄凯[1] 侯军刚[1] 朱鸿民[1]

机构地区：[1]北京科技大学冶金与生态工程学院,稀贵金属绿色回收与提取北京市重点实验室,北京100083

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(51102015)supported by the National Natural Science Foundation of China

年　　份：2014

卷　　号：24

期　　号：12

起止页码：3987-3993

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000347620300033)、SCI-EXPANDED(收录号：WOS:000347620300033)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：Thermodynamics for chemical vapor synthesis （CVS） of Nb nanopowder in NbCl5-H2-Ar system was investigated by using FactSage software. The validation experiments were conducted to confirm the thermodynamics points. The results indicate that under the atmospheric pressure, the reduction approach from NbCl5（g） to Nb（s） is a stage-wise process with the formation of complex sub-chlorides, and is controllable at low hydrogen ratio （mole ratio of n（NbCl5）：n（H2）＆lt;1：180） and low temperature （＆lt;1050 ＆#176;C）. Furthermore, a reasonable amount of inert loading gas is favorable to increase the reduction ratio of NbCl5 and the powder yield. The as-synthesized Nb nanopowder with the homogeneous size of 30-50 nm and the powder yield of 85% （mass fraction） is obtained by the CVS process under n（NbCl5）：n（H2）：n（Ar）=1：120：1 and 950 ＆#176;C with the NbCl5 reduction rate of 96.1%.

关 键 词：NbCl5-H2-Ar system  chemical vapor synthesis （CVS）  thermodynamic  niobium nanopowder  FactSage software  

分 类 号：TB383.1[材料类]