The Potential of Freeze-granulation Technology on Soft Ferrites
In the present work the freeze granulation technique is applied in the manufacturing process of Mn-Zn power ferrites. The powders are prepared by the solid state reaction method and a comparison between the standard industrially used spray-drying method and the freeze granulation process with subsequent freeze drying has been carried out, in terms of granulate morphology, compaction behavior and pore size distribution,sintering behavior and magnetic performance. It appeared that the freeze granulation process enables the formation of homogeneous green compact mierostructures and finally leads to sintered products of good magnetic quality. Consequently, Mn-Zn ferrites with low losses of 287 mW/cm3 (at measuring eonditions f=100 kHz, B=200 mT and T=100℃) are manufactured. The method can be applied in Ni-Zn ferrites as well.
freeze granulation freeze drying ferrites power loss
G.Kogias V.Tsakaloudi P.van der Valk V.Zaspalis
Center for Research and Technology-Hellas,Chemical Process Engineering Research Institute,Laboratory Ferroxcube International,P.O.Box 80058,5600KA Eindhoven,the Netherlands
国际会议
The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)
成都
英文
183-186
2008-10-10（万方平台首次上网日期，不代表论文的发表时间）