Title:
TANTALUM POWDER AND PREPARATION METHOD THEREOF, AND SINTERED ANODE MADE BY SAME
Document Type and Number:
WIPO Patent Application WO/2016/070303
Kind Code:
A1
Abstract:
The present invention relates to the field of rare metal smelting, particularly to a tantalum powder for manufacturing a capacitor, preparation method of the tantalum powder and sintered anode made by the same. The BET of an initial powder of the tantalum powder is 3.0-4.5 m2/g; a secondary agglomerated particle has a large particle size; the FSSS particle size is 1.2-3.0 μm; 75% of the tantalum powder is greater than 325 mesh when measured with a standard sieve; the particle size distribution D50 value is greater than 60 μm; the secondary particle size is large; the specific capacitance of a capacitor obtained by sintering the tantalum powder at a temperature of 1200ºC for 20 minutes and then applying a voltage of 20V is from 140,000 to 180,000 μFV/g; and a residual current therethrough is less than 1.0 nA/μFV. Also provided is a method for preparing the tantalum powder economically.
Inventors:
CHENG YUEWEI (CN)
LIN FUKUN (CN)
ZHANG XUEQING (CN)
LUO GUOQING (CN)
MA HAIYAN (CN)
MA YINGHUI (CN)
WANG YANJIE (CN)
WANG XUANYU (CN)
ZHANG DONGJIE (CN)
LIN FUKUN (CN)
ZHANG XUEQING (CN)
LUO GUOQING (CN)
MA HAIYAN (CN)
MA YINGHUI (CN)
WANG YANJIE (CN)
WANG XUANYU (CN)
ZHANG DONGJIE (CN)
Application Number:
PCT/CN2014/090151
Publication Date:
May 12, 2016
Filing Date:
November 03, 2014
Export Citation:
Assignee:
NINGXIA ORIENT TANTALUM IND CO (CN)
International Classes:
B22F9/20; B22F1/052; H01G9/20
Foreign References:
| CN1197707A | 1998-11-04 | |||
| CN101574741A | 2009-11-11 | |||
| CN1247576A | 2000-03-15 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
中国国际贸易促进委员会专利商标事务所 (CN)
中国国际贸易促进委员会专利商标事务所 (CN)
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