Title:
PROCESS FOR PRODUCING METAL GRAPHITE BRUSH MATERIAL FOR MOTOR
Document Type and Number:
WIPO Patent Application WO/2007/138662
Kind Code:
A1
Abstract:
For production of a metal graphite brush material for motor in which copper particles
can be superimposed all over the surface of graphite particles, there is provided
a process comprising the adhesion step (S1) of bringing graphite particles into
contact with a solution of copper complex so as to attain adhesion of the copper
complex; the heat treatment step (S2) of conducting heat treatment of the graphite
particles having the copper complex adhering thereto in an oxygenous atmosphere
so as to decompose the copper complex with the result that copper particles are
superimposed over the surface of graphite particles; the molding step (S3) of
molding the graphite particles having the copper particles superimposed thereon
to thereby obtain a molded item; and the reduction firing step (S4) of not only
firing the molded item in a reducing atmosphere to thereby obtain a sintered body
but also reducing to copper any copper oxide formed in the surface layer of the
copper particles in the heat treatment step (S2), wherein in the adhesion step
(S1), the solution contains an organometallic compound having a hydrolyzable
group or hydroxyl and an organic functional group with lone electron pair.
Inventors:
KOBAYASHI, Hiroshi (1 Asahi-machi 2-chome,Kariya-sh, Aichi 50, 4488650, JP)
Application Number:
JP2006/310581
Publication Date:
December 06, 2007
Filing Date:
May 26, 2006
Export Citation:
Assignee:
AISIN SEIKI KABUSHIKI KAISHA (1 Asahi-machi 2-chome, Kariya-shi Aichi, 50, 4488650, JP)
アイシン精機株式会社 (〒50 愛知県刈谷市朝日町二丁目一番地 Aichi, 4488650, JP)
アイシン精機株式会社 (〒50 愛知県刈谷市朝日町二丁目一番地 Aichi, 4488650, JP)
International Classes:
H02K13/00; C04B35/52; H02K13/00; C04B35/52
Attorney, Agent or Firm:
KITAMURA, Shuichiro (3-18, Nakanoshima 2-chomeKita-ku, Osaka-sh, Osaka 05, 5300005, JP)
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