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Influence of Substituion on Barium Ferrite Properties

Vladimir Jancarik, Maria Papanova, Darina Kevicka, Rastislav Dosoudil, Anna Gruskova, Ignac Toth

DOI:


Abstract

BaFe12-2x(Ni, Zn)xSnxO19 M - type compounds processed by citrate precursor method with substitution level 0.0 <x<0.6 were studied. Mossbauer spectroscopy and thermomagnetic analysis were used to investigate the magneto - crystalline structure of these hexaferrites. Coercive field intensity Hc, specific saturation magnetic polarisation  Js-m and remanent magnetic polarisation Js-r of ferrite powder specimens were measured. A large change of the coercitity Hc from 330kA/m (x=0.0) to ~70kA/m (x=0.6) was reached as a function of the substitution x. These changes are caused by rearrangement of the Fe3+ ions within the crystalline lattice. Sn4+ ions replace Fe3+ ions on 2b slightly 2a+4f1 sites, while Ni2+ ions occupy 4f2 and 12k sites and Zn2+ ions strongly prefer 4f1 sites.

Keywords


Barium; ferrite; spectroscopy; ions; analysis.

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