The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 03, 2023
Filed:
May. 13, 2022
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Junji Ishii, Tokyo, JP;
Shingo Murakami, Tokyo, JP;
Hiroyuki Tanaka, Tokyo, JP;
Takahiro Kamata, Tokyo, JP;
Toshiaki Terao, Tokyo, JP;
Masaya Yukinobu, Tokyo, JP;
Yuji Watanabe, Kyoto, JP;
Tsutomu Tanimitsu, Kyoto, JP;
Yoshiyuki Kunifusa, Kyoto, JP;
Haruo Nishiyama, Kyoto, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
To provide a fine nickel powder for an internal electrode paste of an electronic component, the nickel powder obtained by a wet method and having high crystallinity, excellent sintering characteristics, and heat-shrinking characteristics. The nickel powder is obtained by precipitating nickel by a reduction reaction in a reaction solution including at least water-soluble nickel salt, salt of metal nobler than nickel, hydrazine as a reducing agent, and alkali metal hydroxide as a pH adjusting agent and water; the reaction solution is prepared by mixing a nickel salt solution including the water-soluble nickel salt and the salt of metal nobler than nickel with a mixed reducing agent solution including hydrazine and alkali metal hydroxide; and the hydrazine is additionally added to the reaction solution after a reduction reaction initiates in the reaction solution.