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Thermal characterization of the intermediary products of the synthesis of Zn-substituted barium hexaferrite

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Abstract

The focus of this work is the use of thermal analyses and Fourier Transform Infrared Spectroscopy (FTIR) for characterization of the gel decomposition, resulting from the formation of Y-barium hexaferrite substituted by Zn ions (Zn-Y-barium hexaferrite). Samples with Ba2Zn2Fe12O22 composition were synthesized by the citrate auto-combustion method. During the TG experiments the highest mass loss was attributed to citrate decomposition owing to the self-combustion reaction, confirmed by the disappearance of –OH band, and the drastic decrease of –CO2 −and –NO3 − bands. Zn substitution resulted in an X-band microwave absorber material.

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Acknowledgements

The authors gratefully acknowledge the AMR-IAE for the reflectivity measurements and IF-UFRJ for the VSM analyses, as well as to CNPq, CAPES and FAPERJ for financial support.

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Authors and Affiliations

  1. Brazilian Navy Research Institute (IPqM), Rua Ipiru no 2, Praia da Bica, Ilha do Governador, Rio de Janeiro, RJ, 21931-090, Brazil

    R. da Costa Lima & Magali Silveira Pinho

  2. Department of Metallurgical and Materials Engineering, Federal University of Rio de Janeiro (COPPE/UFRJ), Rio de Janeiro, RJ, Brazil

    T. Ogasawara

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  1. R. da Costa Lima
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  2. Magali Silveira Pinho
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  3. T. Ogasawara
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Correspondence to Magali Silveira Pinho.

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da Costa Lima, R., Pinho, M.S. & Ogasawara, T. Thermal characterization of the intermediary products of the synthesis of Zn-substituted barium hexaferrite. J Therm Anal Calorim 97, 131–136 (2009). https://doi.org/10.1007/s10973-009-0256-4

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  • DOI: https://doi.org/10.1007/s10973-009-0256-4

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