Title:
MANUFACTURE OF SPHEROIDAL GOLD FINE GRAIN
Document Type and Number:
Japanese Patent JPH05105444
Kind Code:
A
Abstract:
PURPOSE: To provide the method for manufacturing monodispersed spheroidal gold fine grains having ≤1μm grain size.
CONSTITUTION: An acid soln. of gold choride mixed with ammonia and whose pH is regulated to 0.5 to 2.5 and a soln. obtd. by adding a water soluble high polymer compound to an aromatic compound having at least one hydroxyl group as a reducing agent and whose pH is regulated to 8 to 10 are mixed to precipitate gold fine grains, by which monodispersed gold fine grains are obtd. In this way, the spheroidal gold fine grains of ≤1μm satisfying the properties required for the recent ceramic industry, electronic materials or the like can be obtd.
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Inventors:
OTAKI HIROAKI
Application Number:
JP27306391A
Publication Date:
April 27, 1993
Filing Date:
September 25, 1991
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
C01G7/00; (IPC1-7): C01G7/00
Attorney, Agent or Firm:
Chiba Hiroshi
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