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Formation of cadmium-containing W-type hexagonal ferrite

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Abstract

The main steps of the phase formation processes which take place in samples of W-type hexaferrites containing cadmium, prepared by chemical coprecipitation, have been analysed. The processes were followed by Mössbauer spectroscopy, powder X-ray diffraction, thermomagnetic analysis and magnetic measurements. For samples heated in the temperature range 1000–1100°C, the phase formation processes are the same as those verified for the other zinc, nickel, cobalt W-type compounds: forT h=1000°C the only phases present are SrFe12O19 (M-type ferrite) and CdFe2O4 (spinel ferrite); in contrast, forT h>1100°C, the solid state reaction between the M-type and the spinel phases does not take place and the spinel phase decomposes, leading to the formation of α-Fe2O3.

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Authors and Affiliations

  1. Department of Physics, University of Parma, V.le delle Scienze, 43100, Parma, Italy

    G. Albanese, A. Deriu & G. Calestani

  2. Centro di Studio di Strutturistica Diffrattometrica/CNR, Department of Chemistry, University of Parma, V.le delle Scienze, 43100, Parma, Italy

    G. Calestani

  3. Institute MASPEC/CNR, Via Chiavari 18/a, 43100, Parma, Italy

    F. Leccabue & B. E. Watts

Authors
  1. G. Albanese
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  2. A. Deriu
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  3. G. Calestani
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  4. F. Leccabue
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  5. B. E. Watts
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Albanese, G., Deriu, A., Calestani, G. et al. Formation of cadmium-containing W-type hexagonal ferrite. J Mater Sci 27, 6146–6150 (1992). https://doi.org/10.1007/BF01133764

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  • DOI: https://doi.org/10.1007/BF01133764

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