HEXAFERRITE MATERIALS

摘要

Barium, strontium and/or rare earth metal hexaferrite powder of low coercivity can be produced by subjecting a barium, strontium and/or rare earth metal hexaferrite powder to carburising, nitriding, carbonitriding, hydriding or carbohydriding conditions without undue loss of saturation magnetisation. High coercivity powder can be produced by calcining the low coercivity powder (fig. 1). High remanence and high saturation magnetisation powder can be produced by mechanically alloying of a Sr-, Ba and/or rare earth metal hexaferrite powder with iron powder (fig. 12).