公开(公告)号：EP3095540A4

公开(公告)日：2017-11-01

申请号：EP15752366

申请日：2015-02-15

申请人： NINGXIA ORIENT TANTALUM IND CO LTD

发明人： LI ZHONGXIANG ,  CHENG YUEWEI ,  SHI DEJUN ,  DONG XUECHENG ,  WANG TING ,  WANG ZHIDAO ,  WEI JUNXIANG

IPC分类号： B22F9/04 ,  B22F1/00 ,  C22F1/18 ,  H01G9/052

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.

公开(公告)号：EP2237910A4

公开(公告)日：2018-03-14

申请号：EP08869307

申请日：2008-10-13

申请人： NINGXIA ORIENT TANTALUM IND CO LTD

发明人： LI BIN ,  PAN LUNTAO ,  PAN LUNTAO ,  ZHENG AIGUO ,  MA YUEZHONG ,  CHENG YUEWEI ,  DONG XUECHENG ,  ZHANG XUEQING ,  WANG ZHIDAO ,  ZHU BAOJUN

IPC分类号： H01G9/042 ,  B22F1/00 ,  B22F9/04 ,  C22B34/24 ,  C22C1/04 ,  H01G9/00 ,  H01G9/052

CPC分类号： H01G9/042 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/045 ,  H01G9/0029 ,  H01G9/052 ,  H01G9/0525 ,  B22F9/22 ,  B22F1/0085 ,  B22F2201/02

摘要： The present invention relates to valve metal particles uniformly containing nitrogen and a method for preparing the same, and a valve metal green pellet and a sintered pellet made from the particles, and an electrolytic capacitor anode. The present invention provides valve metal particles uniformly containing nitrogen, wherein the difference ratio of nitrogen contents of particles is 20% or less. The present invention provides a process for preparing said valve metal particles uniformly containing nitrogen, wherein the raw material particles of the valve metal were heated in a nitrogen-containing gas at a temperature of 200° C. or less for 2 hours or more. The present invention also provides a valve metal green pellet made from said valve metal particles. The present invention also provides a valve metal sintered pellet.