| 摘要 |
PURPOSE:To provide a high thermo-stability and low coercive force and accomplish a magnetic characteristic with high 4piI incremental rate by using the molten metal quenching method to prepare a rare earth-iron type permanent magnet with the composition specified, and by mixing the powder obtained by crushing it with a thermohardening synthetic resin. CONSTITUTION:An alloy RaFe1-a-b-c-d-eBbCocAldGae (a-e are atomic ratio to be given specifically) is prepared by the molten metal quenching method, where R is at least one of Y and other rare earth elements. The atomic ratios shall range as 0.11<=a<=0.15, 0.05<=b<=0.08, 0<c<=0.15, 0.02<=d<=0.10, 0.01<=e<=0.10. The alloy thus obtained is subjected to hot plastic processing to give magnetical anisotropic property. This is crushed into powder and mixed with 10% by wt. thermohardening epoxy resin, and the resultant undergoes compression molding to accomplish a resin bond type rare earth magnet. This provides a high thermo- stability and excellent magnetic characteristic with low magnetic field for magnetization simultaneously, and the producibility is also enhanced. |
