GOLD POWDER AND PRODUCTION THEREOF - MITSUBISHI MATERIALS CORP

Title:

GOLD POWDER AND PRODUCTION THEREOF

Document Type and Number:

Japanese Patent JPH04147902

Kind Code:

A

Abstract:

PURPOSE: To produce gold powder for alloy-gold clay suitable for use as a molding material by preparing gold powder composed of coarse particles and fine particles stuck to the surfaces of the coarse particles.

CONSTITUTION: An aq. AuCl3 soln. is mixed with an aq. K2SO4 soln. at -10 to +5°C and electrolytic refining is carried out to produce gold powder 1 of about 10-100μm particle size with stuck fine particles of about 0.1-1μm particle size. The pref. average particle size of the powder 1 is about 10μm. The gold powder 1 is mixed with powder 2 of an alloy of other noble metals in about 75:25 ratio to obtain noble metal powder of about ≤200μm mean particle size and alloy-gold clay suitable for use as a molding material for artistic handicrafts, etc., is obtd. by mixing the noble metal powder with a water-soluble cellulosic binder, a surfactant, oil and fat.

Inventors:

MORIKAWA MASAKI
HOSHINO KOJI
MIYAGAWA MASAKI

Application Number:

JP27093890A

Publication Date:

May 21, 1992

Filing Date:

October 09, 1990

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP

International Classes:

B22F1/052; B22F3/00; C04B33/13; B22F9/24; (IPC1-7): B22F1/00; B22F9/24

Domestic Patent References:

JPH02225678A	1990-09-07
JPS61204906A	1986-09-11
JPS63241101A	1988-10-06
JPS4855119A	1973-08-02

Attorney, Agent or Firm:

Masatake Shiga (2 outside)

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