Preparation, characterizations and magnetic properties of doped barium hexaferrites BaFe12-2xMn xSn xO19 (x = 0.0–1.0)

Jingping Wang; Chunli Wu; Tian Xia; Ying Liu; Jing Feng; Milin Zhang

doi:10.1007/s11595-012-0493-4

Journal of Wuhan University of Technology Materials Science Edition ›› 2012, Vol. 27 ›› Issue (3) : 507 -511. DOI: 10.1007/s11595-012-0493-4

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Preparation, characterizations and magnetic properties of doped barium hexaferrites BaFe_12-2xMn_xSn_xO₁₉ (x = 0.0–1.0)

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Abstract

A series of doped barium hexaferrites BaFe_12-2xMn_xSn_xO₁₉ (x = 0.0–1.0) particles were prepared by the co-precipitation/molten salt method. The particle size and crystalline of the samples BaFe_12-2xMn_xSn_xO₁₉ decrease with an increase in the doping amount x. When x is less than 0.8, the pure BaFe_12-2xMn_xSn_xO₁₉ particles with hexagonal plate morphology are obtained. The effects of substitution on magnetic properties were evaluated and compared to nomal BaFe₁₂O₁₉. The specific magnetizations (M _s) of doped materials have been significantly improved. Among all these compositions, the BaFe_10.4Mn_0.8Sn_0.8O₁₉ sample has the highest M _s value of 81.8 A·m²·kg⁻¹ at room temperature and its intrinsic coercivity (H _c) is 44.5 kA·m⁻¹. The as-prepared doped barium ferrites exhibit a low temperature coefficient of coercivity close to zero. The coercivity is independent of temperature when x is in the a range 0.5–0.7.

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doped barium ferrite / co-precipitation/molten salt method / magnetic materials

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Jingping Wang, Chunli Wu, Tian Xia, Ying Liu, Jing Feng, Milin Zhang. Preparation, characterizations and magnetic properties of doped barium hexaferrites BaFe_12-2xMn_xSn_xO₁₉ (x = 0.0–1.0). Journal of Wuhan University of Technology Materials Science Edition, 2012, 27(3): 507-511 DOI:10.1007/s11595-012-0493-4

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