| 摘要 |
PURPOSE:To provide a method of fabrication wherein a high Br, high Hc anisotropic oxide permanent magnet is stably yielded. CONSTITUTION:There is formed with a magnetic field fine powder of a calcinated product yielded by calcinating and grounding a mixture of Fe2O3 and SrCO3. Thereafter, an anisotropic oxide permanent magnet is fabricated through regular firing. Thereupon, the foregoing mixture is calcinated so as to be 5,3-6.1 in its molar ratio and the resulting calcinated product is finally ground. Thereafter, the fine powder is classified and adjusted such that an average particle diameter represented by an air transmission method of the fine powder ranges from 0.6 to 1.0mum, and that coarce powder of a half width of a particle size distribution expressed by a volume ration being 0.1mum or less and being 1.5mum or more is less than 1% by volume and fine powder less than 0.1mum ranges within 0.5-2.0% by volume. Thereafter, the finely adjusted powder is formed through a magnetic field to achieve the object of the present invention. |
