【作者】 何季麟； 潘伦桃； 郑爱国； 李海军；

【Author】 He Ji-lin, Pan Lun-tao, Zheng Ai-guo, Li Hai-jun ( Ningxia Non-Ferrous Metals Smeltery, Shizuishan City, Ningxia, China 753000 )

【机构】 宁夏东方钽业股份有限公司；

【摘要】 叙述了一种新的制取高比表面积钽(铌)粉末的方法,即用至少一种选自Mg, Ca, Sr, Ba 和Ce的碱土金属卤化物加碱金属还原氧化钽(铌)的方法。以氯化钙加钠还原氧化钽为例,得到了比表面积大,化学杂质低的钽粉。这种原生粒子达到纳米级的钽粉原粉经过热团化、降氧等后续处理得到电容器用团化钽粉。对该钽粉进行了湿式电性测试。更多还原

【Abstract】 A new process for making high surface area tantalum and/or niobium powders via the reduction of the corresponding tantalum and/or niobium oxides is presented in the work, wherein the reduction is carried out by reacting the tantalum and/or niobium oxides with at least one metal halide selected from the group consisting of halides of Mg, Ca, Sr, Ba and Ce, and an alkali metal at elevated temperature so as to form the tantalum and/or niobium powders. As an embodiment, high surface area, high purity tantalum powder was obtained by reducing tantalum oxide with CaCl2 and Na, The granulate tantalum powder was obtained by which this crude powder with nanometer primary particle was thermal agglomerated and deoxidization. And the electrical properties of the tantalum powder were tested.更多还原