1. BGRIMM Magnetic Materials & Technology Fuyang Co. Ltd., Fuyang 236000, Anhui, China 2. National Engineering Research Center for Magnetic Materials, Beijing 102600, China
Abstract：Bonded ferrite magnetic powders were prepared using a conventional ceramic sintering method. The effects of the mixing method, the size of the sintered pellets, and the milling method on the product′s productivity were investigated. After one- time mixing and re- mixing, the standard deviation of the composition is controlled at 0. 03, the performance reaches the level of wet mixing, the rolling remanence Br reaches 254mT, the intrinsic coercive force Hcj of the blank reaches 294kA/m, the cost of pre- sintering is reduced and the production effectiveness is increased. Sintered pellet size is controlled at 8- 15mm with highest product performance. After sintering, the pellet is mixed and milled. After sanding, the rods were continuously grounded. The performance reached the best level, and the remanence Br was 265mT and the intrinsic coercive force Hcj was 305kA/m.
2018, Vol. 25 
