Title:
FLAKY MICROCAPSULE AND METHOD FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO/2018/010108
Kind Code:
A1
Abstract:
Provided are a tantalum flake powder and method for preparation thereof; said tantalum flake powder contains 300-1800 ppm of nitrogen, 10-100 ppm of phosphorus, and 1-40 ppm of boron. The tantalum flake powder has high capacity and low leakage current, good puncture-resistance, and particularly outstanding high-frequency attributes. Doping with nitrogen during oxygen reduction is performed before three thermal treatments are carried out; the solution of performing three thermal treatments and a subsequent process improves the uniformity of distribution of elemental nitrogen and makes up for the deficiency of an oxide film, thereby increasing the pressure resistance of the product, and especially its high-frequency attributes.
Inventors:
CHEN XUEQING (CN)
CHENG YUEWEI (CN)
MA YUEZHONG (CN)
LI ZHONGXIANG (CN)
WANG ZHIDAO (CN)
LI XIA (CN)
SHI DEJUN (CN)
ZHAO ZHONGHUAN (CN)
CHENG YUEWEI (CN)
MA YUEZHONG (CN)
LI ZHONGXIANG (CN)
WANG ZHIDAO (CN)
LI XIA (CN)
SHI DEJUN (CN)
ZHAO ZHONGHUAN (CN)
Application Number:
PCT/CN2016/089874
Publication Date:
January 18, 2018
Filing Date:
July 13, 2016
Export Citation:
Assignee:
NINGXIA ORIENT TANTALUM IND CO LTD (CN)
International Classes:
B22F1/00; C22B34/24; B22F1/068; B22F1/142; B22F1/145; B22F9/20
Foreign References:
| CN1236177A | 1999-11-24 | |||
| CN1433485A | 2003-07-30 | |||
| CN101234425A | 2008-08-06 | |||
| JP2002030301A | 2002-01-31 | |||
| CN1872461A | 2006-12-06 |
Other References:
See also references of EP 3486338A4
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
Download PDF: