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

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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References

  1. 1.

    J. Smit andH. P. J. Wijn, in “Ferrites” (Philips Technical Library, Eindhoven, 1959).

  2. 2.

    G. Heimke,Z. Angew. Phys. 15 (1963) 271.

  3. 3.

    E. C. Stoner andE. P. Wohlfarth,Phil. Trans. R. Soc. A240 (1948) 599.

  4. 4.

    C. M. Mee andJ. C. Jeschke,J. Appl. Phys. 34 (1963) 1271.

  5. 5.

    K. Haneda, C. Miyakawa andH. Kojima,J. Amer. Ceram. Soc. 57 (1974) 354.

  6. 6.

    B. T. Shirk andW. R. Buessem,ibid. 53 (1970) 192.

  7. 7.

    H. B. Beer andG. V. Planer,Br. Commun. Electron. 5 (1958) 939.

  8. 8.

    W. Ross,J. Amer. Ceram. Soc. 63 (1980) 601.

  9. 9.

    K. Kiriyama andR. Kiriyama,Acta Crystallogr. A28 (1972) 62.

  10. 10.

    S. Okamoto, H. Sekizawa andS. I. Okamoto,J. Phys. Chem. Solids 36 (1973) 591.

  11. 11.

    S. Okamoto, S. I. Okamoto andT. Ito,Acta Crystallogr. B29 (1973) 832.

  12. 12.

    D. Barb, L. Diamandescu, A. Rusi andD. T→⇃⇒anu-Mih⇄l↠, Romanian Patent OSIM No. 79845 (1981).

  13. 13.

    V. Adelsköld,Ark. Kemi. Min. Geol. 12A (1983) 1.

  14. 14.

    J. S. Wieringen andJ. G. Grensen,Angew. Phys. 21 (1966) 69.

  15. 15.

    J. S. Van Wieringen,Philips Tech. Rev. 28 (1967) 33.

  16. 16.

    D. Barb,et al., in preparation.

  17. 17.

    F. Haberey, K. Kuncl andM. Velicescu,Linseis J. 1 (1973) 6.

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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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Keywords

  • Polymer
  • Microscopy
  • Electron Microscopy
  • Barium
  • Magnetic Property