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METHOD FOR PRODUCING TANTALUM OR NIOBIUM POWDER FOR CAPACITOR 发明申请

2023-08-03 2260 580K 0

专利信息

申请日期 2025-07-10 申请号 JP2006183974
公开(公告)号 JP2008013793A 公开(公告)日 2008-01-24
公开国别 JP 申请人省市代码 全国
申请人 KOREA ATOMIC ENERGY RES; KOREA HYDRO NUCLEAR POWER CO
简介 PROBLEM TO BE SOLVED : To provide a method for producing tantalum or niobium powder for a capacitor. SOLUTION : The method for producing tantalum (Ta) or niobium (Nb) powder for a capacitor in an electrolytic reduction reactor including an anode, a cathode and a molten salt comprises : a stage where, in a molten salt composed of the halide of at least one metal selected from alkali metals and alkaline-earth metals, and alkali metal oxide, the alkali metal oxide is subjected to primary electrolytic reduction at the cathode, and tantalum pentoxide (Ta2O5) or niobium pentoxide (Nb2O5) is partially reduced with the electrolytically reduced alkali metal, so as to obtain tantalum or niobium oxide expressed by Ta2O(5-y) or Nb2O(5-y) (wherein, y=2.5 to 4.5); and a stage where the halide of at least one metal selected from alkali metals and alkaline-earth metals is subjected to primary electrolytic reduction at the cathode, and is brought into secondary reduction reaction with tantalum or niobium oxide expressed by Ta2O(5-y) or Nb2O(5-y) (wherein, y=2.5 to 4.5), so as to obtain tantalum or niobium powder. COPYRIGHT : (C)2008, JPO&INPIT


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