Composite nickel fine powder and method for preparing the same
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsYoshiharu Toshima, Takayuki Araki, Yasuhide Yamaguchi, Takao Hayashi, Hiroyuki Shimamura
Life of this patent
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Abstract
The composite nickel fine powder includes surface-oxidized nickel fine particles and at least one member selected from the group consisting of oxides and complex oxides of at least one metal element having an atomic number ranging from 12 to 56 or 82 and belonging to Group 2 to 14 of the Periodic Table on the surface of the surface-oxidized nickel fine particles.
Claims7
A method for preparing composite nickel fine powder comprising the steps of:
- adding an aqueous solution containing at least one member selected from the group consisting of water-soluble salts of metal elements each having an atomic number of 82 or ranging from 12 to 56 and belonging to Group 2 to 14 of Periodic Table to a slurry containing metal nickel fine particles or metal nickel fine particles whose surface is oxidized to form a mixture;
- and
- adjusting the pH of the mixture with an acid or an alkali to thus carry the metal oxide and/or the metal complex oxide derived from the water-soluble salt on the surface of the metal nickel fine particles.
A method for preparing composite nickel fine powder comprising the steps of:
- temporarily carrying at least one member selected from the group consisting of ultrafine particles of oxides and complex oxides containing at least one metal element having an atomic number of 82 ranging from 12 to 56 and belonging to Group 2 to 14 of Periodic Table to the surface of metal nickel fine particles or metal nickel fine particles whose surface is oxidized and colliding the nickel fine particles temporarily carrying the ultrafine particles adhered thereto with each other or other objects to thus carry the ultrafine particles on the surface of the metal nickel fine particles.
A method for preparing composite nickel fine powder comprising the steps of:
- mixing, with heating, a suspension containing at least one member dispersed therein and selected from the group consisting of ultrafine particles of oxides and complex oxides containing at least one metal element having an atomic number of 82 or ranging from 12 to 56 and belonging to Group 2 to 14 of Periodic Table with metal nickel fine particles or metal nickel fine particles whose surface is oxidized;
- removing the medium of the suspension to thus temporarily carry the ultrafine particles on the surface of the metal nickel fine particles;
- and
- colliding the nickel fine particles temporarily carrying the ultrafine particles adhered thereto with each other or other objects to thus carry the ultrafine particles on the surface of the metal nickel fine particles.
Dependencies are inferred from the claim text.