Abstract：The powder metallurgy method was initially used to prepare M-type rare-earth permanent ferrites with the composite addition of CaSiO3 and BBSS flux. Then the average particle size of the forming materials were tested by Fisher particle size analyzers， meanwhile， the microstructure， phases， fracture surfaces and magnetic properties of the samples were also measured by SEM， EDS， XRD and permanent magnetic ferrite meters， etc. Finally， the apparent density was tested by buoyancy method. Experimental results show that， the composite addition of CaSiO3 and BBSS flux promotes the uniform growth of M-type ferrite grains， and ameliorates the orientations， thereby significantly improves the magnetic properties and the temperature coefficient of [HCJ.]But the Curie temperature of ferrite decreases slightly. When 0.7% (mass percent) CaSiO3 and 0.4% (mass percent) BSSS flux are added into the sintered materials[(Ca0.45La0.45Sr0.1Fe10.3Co0.3O19-δ)] at the time of the fine pulverization， M-type high performance rare-earth permanent ferrite are obtained with[Br]of 455 mT，[HCJ]of 412 kA/m，[M*]of 6 275.3 and [Hk/HCJ]of 95.8%.
2016, Vol. 26 
