Title:
How to prepare capacitor grade tantalum powder with high nitrogen content, capacitor grade tantalum powder prepared by that method, and anodes and capacitors prepared from tantalum powder.
Document Type and Number:
Japanese Patent JP6367356
Kind Code:
B2
Abstract:
A method for preparing a tantalum powder of capacitor grade, comprising: solid tantalum nitride is added when potassium fluotantalate is reduced by sodium. The method increases the nitrogen content in the tantalum powder, and at the same time improves the electrical performance of the tantalum powder. The specific capacitance is increased, and the leakage current and loss is improved. The qualification rate of the anode and the capacitor product is also improved. The method is characterized in that the nitrogen in the tantalum nitride diffuses between the particles of the tantalum powder, with substantially no loss, and thus the nitrogen content is accurate and controllable.
Inventors:
Yang, Guoki
Jeong, Ai Guo
Chen, Yue Wei
Ma, Yuecheon
Jeong, Ai Guo
Chen, Yue Wei
Ma, Yuecheon
Application Number:
JP2016558241A
Publication Date:
August 01, 2018
Filing Date:
December 10, 2013
Export Citation:
Assignee:
Ninthia Orient Tantalum Industry Company, Limited
National Engineering Research Center for Special Metal Materials of Tantalum and Niobium
National Engineering Research Center for Special Metal Materials of Tantalum and Niobium
International Classes:
B22F9/20; B22F1/00
Domestic Patent References:
| JP2310301A | ||||
| JP2002030301A | ||||
| JP2003525350A |
Attorney, Agent or Firm:
Asamura patent office