| 摘要 |
PROBLEM TO BE SOLVED: To provide insulation-coated metal particles in which a dense insulation coating having high bonding strength with the surface of each metal particle is formed, and to provide a production method capable of easily producing the insulation-coated metal particles. SOLUTION: The insulation-coated metal particles are obtained by, using a metal organic compound capable of forming a hydroxyl group by hydrolysis, forming a coating derived from a metal oxide sol (such as a silica sol and an alumina sol) on the surface of each metal particle via a -O-Me-O- bond (Me is metals comprised in the metal organic compound). In the method for producing insulation-coated metal particles, after the regulation of the pH in a solution comprising metal particles, a metal organic compound and a metal oxide sol to 3 to 4, the solution is stirred and is left standing to allow a hydroxyl group derived from the metal organic compound to adsorb (bond) on the metal oxide sol or the metal particles; subsequently, the value of the pH in the solution is changed by≥2 to promote dewatering and condensation reaction, so as to form a -O-Me-O bond; the metal oxide sol is allowed to adsorb (bond) on the metal particles via the bonding; and thereafter, the solution is filtered, dried and heat-treated. COPYRIGHT: (C)2006,JPO&NCIPI
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