MAGNETIC SEMICONDUCTOR GLOBULAR FINE PARTICLE AND MANUFACTURE THEREOF

摘要

PURPOSE:To obtain magnetic semiconductor globular fine particles which have no magnetic anisotropy and can be applied to a substrate to realize a magnetic recording medium with excellent magnetic characteristics and which can produce compound component gas of a ferrite component and a ceramic component as CVD materials by making solid solution of the ceramic component and the ferrite component uniformly and foriming the solid solution into globular fine particles. CONSTITUTION:Magnetic semiconductor particles which are obtained by making uniform solid solution of a ceramic component and a ferrite component and forming the solid solution into globular fine particles are employed. Powder which is composed of ferrite-ceramic composite particles which are obtained by coating the surfaces of ceramic fine particles with ferrite crystals are heated and melted at a high temperature and chilled by high speed flame-coating on a cooling material to form solid solution globular fine particles. For instance, the powder composed of ferrite-ceramic composite particles (the average particle size is 0.6 mum) which are obtained by coating the surfaces if the ceramic fine particles with the crystals of ferrite are reduced and melted at a high temperature in a plasma flame.-coating apparatus and the melted powder is made to collide against water or a cooling plate with a high speed (about 30 m/sec) to obtain amorphous magnetic semiconductor globular fine particles in which the ceramic component and the ferrite component are coupled with each other.