公开(公告)号：EP3184205A4

公开(公告)日：2018-04-11

申请号：EP14900092

申请日：2014-08-20

申请人： NINGXIA ORIENT TANTALUM IND CO LTD ,  NATIONAL ENGINEERING RES CENTER FOR SPECIAL METAL MATERIALS OF TANTALUM AND NIOBIUM

发明人： YANG GUOQI ,  ZHENG AIGUO ,  MA YUEZHONG

IPC分类号： B22F1/00 ,  B22F9/02 ,  B22F9/16 ,  H01G9/00

CPC分类号： B22F1/0055 ,  B22F1/00 ,  B22F1/0085 ,  B22F1/0088 ,  B22F1/0096 ,  B22F9/02 ,  B22F9/04 ,  B22F9/16 ,  B22F9/22 ,  B22F2301/20 ,  B22F2998/10 ,  C22F1/18 ,  H01G9/00 ,  H01G9/0029 ,  H01G9/042 ,  H01G2009/05

摘要： The present invention relates to a composite tantalum powder and a process for preparing the same, and to a capacitor anode prepared from the tantalum powder. The method for preparing a composite tantalum powder comprises the following steps of: 1) providing a tantalum powder prepared by a reduction process, and flattening the tantalum powder so as to prepare a flaked tantalum powder; 2) providing a granular tantalum powder prepared from tantalum ingot; 3) mixing the flaked tantalum powder and the granular tantalum powder to give a tantalum powder mixture; and 4) thermally treating the tantalum powder mixture, and then pulverizing, screening to give a composite tantalum powder. The present invention further relates to a composite tantalum powder prepared from the process and the use thereof in a capacitor.

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.