Influence of Ta2O5 Addition on the Properties of MnZn Power Ferrites

doi:10.3724/SP.J.1077.2009.00379

Abstract

Abstract: MnZn ferrites with the chemical formula Mn_0.68Zn_0.25Fe_2.07O₄ were prepared by conventional ceramic techniques. The influence of Ta₂O₅ addition on the microstructure and magnetic properties of MnZn ferrites was investigated. When the Ta₂O₅ addition is less than 0.04wt%, the grain size increases with the increase of Ta₂O₅ concentration, the initial permeability, saturation magnetic flux density and DC resistivity increase, the power losses and porosity decrease. However, excessive Ta₂O₅ addition (>0.04wt%) results in the exaggerated grain growth and porosity increase which make the initial permeability, saturation magnetic flux density and DC resistivity decrease, and the power losses increase. When the Ta₂O₅ addition is 0.04wt%, the initial permeability, saturation magnetic flux density and DC resistivity reach the maximum, the power losses and porosity reach the minimum.

Key words: MnZn power ferrites, Ta₂O₅ addition, microstructure, magnetic properties

CLC Number:

TM277

LI Le-Zhong,LAN Zhong-Wen,YU Zhong,SUN Ke,LUO Ming,JI Hai-Ning. Influence of Ta₂O₅ Addition on the Properties of MnZn Power Ferrites[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2009.00379.

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Influence of Ta₂O₅ Addition on the Properties of MnZn Power Ferrites

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