| 摘要 |
PURPOSE:To obtain a magnetic-material resin composite material whose magnetic characteristic is high, whose surface smoothness, mechanical strength and dimensional stability are excellent and whose molding property and magnetic-field orientation property are excellent by a method wherein the following are contained in specific amounts: a rare earth-iron-nitrogen-based magnetic pulverulent body; a specific coupling agent; a thermoplastic resin; and a lubricant. CONSTITUTION:This magnetic-material resin composite material is constituted of the following: 70 to 95wt.% of a rare earthiron-nitrogen-based pulverulnent body; 0.01 to 5wt.% of a coupling agent which has one kind or two or more kinds of organic chains out of an amino group, an alkyl group, a >=3 C alkoxy group, a >=10 C phenoxy group, a methacrylic group, a sulfonyl group, a mercapto group, an ester bond, a phosphoric ester bond, a pyrophosphoric ester bond, a phosphorus ester bond, a urea bond and an amide bond and which contains at least one kind out of titanium and silicon; 3 to 30wt.% of a thermoplastic resin; and 0 to 5wt.% of a lubricant. The magnetic-material resin composite material is excellent in its molding property and its magnetic characteristic, and it is possible to obtain a bonded magnet whose dimensional stability and surface smoothness are extremely good. |
