Title:
A PROCESS FOR PREPARING TANTALUM POWDER AND&sol OR NIOBIUM POWDER HAVING HIGH SPECIFIC SURFACE AREA
Document Type and Number:
WIPO Patent Application WO/2003/068435
Kind Code:
A1
Abstract:
This invention discloses a process for preparing tantalum powder and&sol or niobium powder having high specific surface area. The process is carried out by reducing the oxides of tantalum and&sol or niobium, in which at least one halide selected from the group consisting of halides of Mg, Ca, Sr, Ba, and Ce reacts with an alkali metal and the said oxides of tantalum and&sol or niobium at a sufficiently high temperature. The process of this invention is simple, while the tantalum powder and&sol or niobium powder obtained has a high specific surface area, high purity, and good fluidity. Therefore, this process is particularly suitable for making capacitors and anodes.
Inventors:
HE JILIN
PAN LUNTAO
YUAN NINGFENG
WEN XIAOLI
LI XINGBANG
PAN LUNTAO
YUAN NINGFENG
WEN XIAOLI
LI XINGBANG
Application Number:
PCT/CN2002/000700
Publication Date:
August 21, 2003
Filing Date:
September 29, 2002
Export Citation:
Assignee:
NINGXIA ORIENT TANTALUM INDUST (CN)
International Classes:
B22F9/20; B22F9/24; C21B15/00; C22B5/04; C22B34/24; H01G9/052; (IPC1-7): B22F9/18
Foreign References:
| US4149876A | 1979-04-17 | |||
| CN1251325A | 2000-04-26 | |||
| CN1240688A | 2000-01-12 | |||
| JPS60145304A | 1985-07-31 | |||
| JPS5014604B1 | 1975-05-29 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (2 Fuchengmenwai Street, Beiging 7, CN)
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