| 摘要 |
A method for producing a fine powder of metallic nickel comprised of fine spherical particles having an average particle diameter of 0.05 to 10 mu m characterized in that it comprises a first step of dissolving nickel carbonate and/or nickel hydroxide represented by Ni(CO3)x . (OH)y, wherein 0 </= x </= 1.5 and 0 </= y </= 3, in an aqueous ammonia solution, or an aqueous solution of ammonia and ammonium carbonate, ammonium hydrogen carbonate or a carbonate or hydrogen carbonate of an alkali metal to form an aqueous nickel solution, preparing a W/O type emulsion comprising a non-aqueous medium and droplets of the aqueous nickel solution, and removing volatile components form the droplets to precipitate nickel carbonate, thereby forming fine spherical particles of nickel carbonate, and a second step of heating the nickel carbonate particles under a hydrogen atmosphere in the presence of 0.01 to 30 wt % in terms of oxide of a fusion preventive agent comprising a compound of at least one element selected from among an alkaline earth element, aluminum, silicon and a rare earth element, thereby reducing the nickel carbonate particles.
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| 申请人 |
SAKAI CHEMICAL INDUSTRY CO., LTD.;MIZUTANI, HIDETO;YONEDA, MINORU;SUGAYA, TOSHIHIRO;URASUMI, HIROYOSHI;HONDA, CHIYO;NAKAO, HIROSHI;HATANAKA, TSUTOMU;OHGAMA, SHINJI;FUKAI, KIYOSHI;NAGANO, KAZUHIKO;KUMISAKA, SHIGEFUMI;ABE, KAZUNOBU |
发明人 |
MIZUTANI, HIDETO;YONEDA, MINORU;SUGAYA, TOSHIHIRO;URASUMI, HIROYOSHI;HONDA, CHIYO;NAKAO, HIROSHI;HATANAKA, TSUTOMU;OHGAMA, SHINJI;FUKAI, KIYOSHI;NAGANO, KAZUHIKO;KUMISAKA, SHIGEFUMI;ABE, KAZUNOBU |
