Influence of Substituion on Barium Ferrite Properties
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 inten...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
VSB-Technical University of Ostrava
2004-01-01
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| Series: | Advances in Electrical and Electronic Engineering |
| Subjects: | |
| Online Access: | http://advances.utc.sk/index.php/AEEE/article/view/425 |
| Summary: | 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. |
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| ISSN: | 1336-1376 1804-3119 |