Mn-Zn系フェライトの初透磁率とFe2+イオンとの関係

概要

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The effects of Fe2+ ion content on the initial permeability have been studied in Mn-Zn ferrites of various Mn/Fe ratios. The initial permeability and resistivity depend substantially on the Fe2+ ion content at. the regions containing a small excess of Fe2O3 over the stoichiometric composition. While, when additives are used, the relation between initial permeability and resistivity can not be simply compared to none additive ferrites. It was found that the values of initial permeability of Mn-Zn ferrite systems containing small amount of Te or MoO3 were strongly dependent on the Fe2+ ion content, but the resistivity values were nearly independent upon the presence of Fe2+ ions. The conduction mechanism of resistivity of the materials containing additives could not be explained on the theory of the electron transfer of Fe2+ ?? Fe3+ ion at the B-site in spinel lattice. Some explanations of these additive effects are presented.
社団法人粉体粉末冶金協会の論文