Title:
球状二硫化タングステン粉末
Document Type and Number:
Japanese Patent JP2006508013
Kind Code:
A
Abstract:
A tungsten disulfide powder comprised of macro-spherical particles of tungsten disulfide having an average particle diameter of from about 5 to about 50 micrometers is prepared by successively treating spray-dried powders of ammonium metatungstate with heat in air and sulfidizing the resultant tungsten trioxide in a carbon disulfide-containing atmosphere at about 750° C. The tungsten disulfide powder may also be formed to have a bimodal particle size distribution of the macro-spherical particles and smaller, dispersed micro- to submicron-sized fine particles.
Inventors:
Richard G. W. Gingerrich
Application Number:
JP2005508296A
Publication Date:
March 09, 2006
Filing Date:
August 20, 2003
Export Citation:
Assignee:
Osram Sylvania Incorporated
International Classes:
C01G41/00; C10M103/06; C10M125/22; C10M171/06; C10M177/00; C10N10/12; C10N20/06; C10N30/06; C10N50/08
Attorney, Agent or Firm:
Motohiro Kurauchi
Hiroshi Kazama
Endo Azusa
Takumi Yoshida
Taku Nakajima
Hiroshi Kazama
Endo Azusa
Takumi Yoshida
Taku Nakajima