Title:
NICKEL-TUNGSTEN ALLOY POWDER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPH1192807
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To produce nickel-tungsten alloy powder suitable for the electrode material for the inner electrode of a laminated ceramic capacitor and to provide a method for producing the same. SOLUTION: This nickel-tungsten alloy powder is the one in which the content of tungsten is regulated to, by weight, 5 to 40%, and the average particle size is regulated to 0.1 to 1 μm. The alloy powder can be obtd. by mixing an alkaline-earth metal salt, a nickel salt and a tungsten salt, executing reductive calcining in an atmosphere contg. hydrogen, and, after the calcining, melting away the alkaline-earth metal salt with acid. In the above producing method, the mixing ratio of the alkaline-earth metal salt is preferably regulated to 0.1 to 2 times by the weight ratio to the weight of the nickel-tungsten alloy powder produced after the calcining. Furthermore, as the calcining method, two stage calcining in which, after calcining at 400 to 800 deg.C, furthermore, calcining is executed at 1000 to 1500 deg.C is preferably used.
Inventors:
ABE ISAO
Application Number:
JP25442097A
Publication Date:
April 06, 1999
Filing Date:
September 19, 1997
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
International Classes:
B22F9/22; B22F1/00; (IPC1-7): B22F9/22; B22F1/00