The permanentmagneticferrite was prepared by the method of solid phase reaction with the natural magnetite without magnetic separation.
用天然磁铁矿作原料，不进行磁选，直接用固相反应法生产永磁铁氧体。
2
Permanentferrite samples were prepared from YF28 pre-sintering materials doped with different additives with an industrial craft method and their magnetic properties were investigated.