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Patent Searching and Data


Title:
PRODUCTION OF COARSE POWDER OF TUNGSTEN
Document Type and Number:
Japanese Patent JPS5842705
Kind Code:
A
Abstract:

PURPOSE: To obtain coarse tungsten powder for electrical contact materials, etc. easily at a relatively low temp. by adding a specific content of a lithium compd. to tungsten oxide then reducing the same.

CONSTITUTION: A lithium compd. as Li2O is added to tungsten oxide (WO3) by the content which is ≥5×10-4mol basing on 100g WO3 and at which substantially no adverse influence is given to the fonal product. The mixture is subjected to prescribed reduction at a relatively low temp. below about 1,000°C. By such method, the tungsten powder of coarse single particles having about 40μm average particle sizes is easily obtained.


Inventors:
YAMAMOTO HIROSHI
Application Number:
JP14135381A
Publication Date:
March 12, 1983
Filing Date:
September 07, 1981
Export Citation:
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Assignee:
NIPPON TUNGSTEN
International Classes:
B22F9/22; (IPC1-7): B22F9/20