| 摘要 |
PURPOSE:To improve mechanical strength without damaging magnetic characteristics by previously surface-treating magnetic powder with a silane coupling agent or a titanium coupling agent. CONSTITUTION:When a composite magnet wherein magnetic powder and a resin are mixed, kneaded and formed is manufactured, the magnetic powder is surface-treated under the existence of both a silane coupling agent and a titanium coupling agent and then, the magnetic powder is mixed with the resin and kneaded. That is, when the composite magnet is manufactured, the magnetic powder is previously under the existence of the silane coupling agent and the titanium coupling agent with the condition of the ratio 1:3-10 (weight ratio). The alloy powder of an rare earth element including samarium, cobalt or yttrium for the magnetic powder is used. This enables obtaining the composite magnet wherein the magnetic characteristics, mechanical strength and also the economy are improved. |
