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|1. (WO2018010108) FLAKY MICROCAPSULE AND METHOD FOR PREPARING SAME|
|Applicants:||NINGXIA ORIENT TANTALUM INDUSTRY CO. ,LTD.
|Title:||FLAKY MICROCAPSULE AND METHOD FOR PREPARING SAME|
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.