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1.发明公开
公开(公告)号：EP3095540A4
公开(公告)日：2017-11-01
申请号：EP15752366
申请日：2015-02-15
发明人： LI ZHONGXIANG , CHENG YUEWEI , SHI DEJUN , DONG XUECHENG , WANG TING , WANG ZHIDAO , WEI JUNXIANG
CPC分类号： B22F1/0055 , B22F1/0085 , B22F1/0088 , B22F1/0096 , B22F9/04 , B22F2009/042 , B22F2009/043 , B22F2009/045 , B22F2301/20 , B22F2998/10 , C22F1/18 , H01G9/042 , H01G9/052 , H01G9/0525
摘要： The present invention provides a process for preparing tantalum powders for use in an electrolytic capacitor with high reliability and high specific capacitance, characterized in that the ratio of the average particle size of raw tantalum powders to the average particle size of tantalum flake powders is 0.5-25, preferably 1.5-10, more preferably 2-5. The process of the present invention is simple and has good controllability, the tantalum flake powder obtained has low content of metal impurities, high specific surface area, and after agglomerated, have good flowability and moldability, have high specific capacitance, and when used under high voltage, have low leakage current and high breakdown voltage.
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公开(公告)号：EP3112059A4
公开(公告)日：2017-11-15
申请号：EP14883916
申请日：2014-02-27
发明人： LI ZHONGXIANG , CHENG YUEWEI , CHEN XUEQING , WANG TING , SHI DEJUN , TONG ZEKUN , YAN YAN , TIAN XIAOYU , ZHAO ZHONGHUAN
CPC分类号： B22F1/0003 , B22F9/023 , B22F9/04 , B22F9/16 , B22F2009/043 , B22F2301/20 , B22F2304/10 , B22F2998/10 , C22F1/18 , C23G1/00
摘要： The present invention relates to a high-purity tantalum powder and a preparation method therefore. The tantalum powder has a purity of more than 99.995%, as analyzed by GDMS. Preferably, the tantalum powder has an oxygen content of not more than 1000 ppm, a nitrogen content of not more than 50 ppm, a hydrogen content of not more than 20 ppm, a magnesium content of not more than 5 ppm, and an average particle diameter D50 of less than 25 µm.
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