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1. (WO2018010108) FLAKY MICROCAPSULE AND METHOD FOR PREPARING SAME

Pub. No.:    WO/2018/010108    International Application No.:    PCT/CN2016/089874
Publication Date: Fri Jan 19 00:59:59 CET 2018 International Filing Date: Thu Jul 14 01:59:59 CEST 2016
IPC: C22B 34/24
B22F 9/20
Applicants: NINGXIA ORIENT TANTALUM INDUSTRY CO. ,LTD.
宁夏东方钽业股份有限公司
Inventors: CHEN, Xueqing
陈学清
CHENG, Yuewei
程越伟
MA, Yuezhong
马跃忠
LI, Zhongxiang
李仲香
WANG, Zhidao
王治道
LI, Xia
李霞
SHI, Dejun
师德军
ZHAO, Zhonghuan
赵忠环
Title: FLAKY MICROCAPSULE AND METHOD FOR PREPARING SAME
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.