Grain Size Dependence of Magnetic Property in Ni0.49Zn0.49Co0.02Fe1.90Ox Ferrite
Polycrystalline Ni0.49Zn0.49Co0.02Fe1.90Ox ferrite has been fabricated using the conventional ceramic sintering method. Grain sizes have been adjusted from ～2.2μm to ～13.5μm with changing sintering conditions.Grain size dependences of both complex permeability and core loss have been investigated. It is suggested that the permeability is dominated only by the spin rotation with smaller grain size than ～6.4μm, and the domain wall contributes the permeability for the samples with bigger grain. Core loss has been drastically decreased at the mono-domain state, and such low loss can be explained by the reversible magnetization through the spin rotation.The simplified wire-wounded type inductors have been also fabricated and characterized. The result indicates that the inductor fabricated with the smaller grain size has the better performance in the quality value under the relatively higher current.
Core loss Grain size inductor quality factor
M.Hachiya Y.Iijima N.Sato K.Kawano Y.Mizuno H.Kishi
Materials Research & Development Department,TAIYO YUDEN CO.,LTD.5607-2,Nakamuroda-raachi,Takasaki-shi Gunma 370-3347,Japan
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
224-227
2008-10-10（万方平台首次上网日期，不代表论文的发表时间）