Improving soft magnetic properties of Mn-Zn ferrite by rare earth ions doping

Improving soft magnetic properties of Mn-Zn ferrite by rare earth ions doping

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Mn-Zn ferrites doped with different Sm2O3, Gd2O3, Ce2O3 or Y2O3 were prepared by traditional ceramic technology using industrial pre-sintered powders.A small amount of Sm2O3, Gd2O3, Ce2O3 or Y2O3 can significantly improve the microstructure and magnetic properties.The single spinel phase structure can be maintained with the Gastrointestinal - Enemas doping amount up to 0.07 wt.

%.A refined grain structure and uniform grain size distribution can be obtained by doping.For all rare earth oxides, a small amount of doping can significantly increase the permeability and reduce the coercivity and magnetic core loss.The optimized doping amount for Sm2O3 or Gd2O3 is 0.

01 wt.%, while HAIR PASTE TEXTURIZING for Ce2O3 or Y2O3 is 0.03 wt.%.

A further increase of the doping content will lead to reduced soft magnetic properties.The ferrite sample with 0.01 wt.% Sm2O3 exhibits the good magnetic properties with permeability, loss, and coercivity of 2586, 316 W/kg, and 24A/m, respectively, at 200 mT and 100 kHz.

The present results indicate that rare earth doping can be suggested to be one of the effective ways to improve the performance of soft ferrites.