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Preparation of barium hexaferrite by a hydrothermal method: structure and magnetic properties

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Abstract

Barium hexaferrite, BaFe12O19, was obtained in hydrothermal conditions from a water suspension of α-FeOOH and Ba(OH)2 · 8H2O at a temperature about 315° C. X-ray and Mössbauer spectroscopy as well as electron microscopy investigations demonstrated the appearance of α-Fe2O3 as an intermediate phase in the hydrothermal process. The magnetic characteristics of the obtained isotropic magnets are the following: coercive fieldH c ∼159 kA m−1, residual inductionB r ∼0.26 T, maximum energy product (BH) max∼12 kJ m−3. The hydrothermal procedure for the preparation of barium hexaferrite in comparison with the conventional one is discussed.

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Authors and Affiliations

  1. Institute for Physics and Technology of Materials, PO Box MG-6, Bucharest, Romania

    D. Barb, L. Diamandescu, A. Rusi, D. TĂrĂbĂsanu-MihĂilĂ, M. Morariu & V. Teodorescu

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  1. D. Barb
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  2. L. Diamandescu
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  3. A. Rusi
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  4. D. TĂrĂbĂsanu-MihĂilĂ
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  5. M. Morariu
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  6. V. Teodorescu
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Barb, D., Diamandescu, L., Rusi, A. et al. Preparation of barium hexaferrite by a hydrothermal method: structure and magnetic properties. J Mater Sci 21, 1118–1122 (1986). https://doi.org/10.1007/BF00553240

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  • DOI: https://doi.org/10.1007/BF00553240

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