Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

The effects of magnetic quenching on glassy barium ferrite

Abstract

Barium ferrite (BaFe12O19) prepared by solution evaporation techniques from ethylene glycol/citric acid or ethylene glycol/pyridine-1-oxide solutions is initially obtained in a glassy form. Although visual observations on samples heated to 1250° C showed that transparency was maintained in thin sections, X-ray powder diffraction studies showed the development of ordered regions of BaFe12O19. Prolonged heating at 1250° C resulted in a loss of visual transparency. Samples of partially amorphous material cooled rapidly in a weak magnetic field were found to have a magnetization considerably higher than samples cooled in the absence of a field. Samples rendered polycrystalline by heating for extended periods at 1250° C showed a lower magnetization on magnetic quenching.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    M. Pechini, US Patent No. 3330697 (1967).

  2. 2.

    N. G. Eror andU. Balachandran,J. Solid State Chem. 40 (1981) 85.

  3. 3.

    U. Balachandran andN. G. Eror,J. Mater. Sci. 17 (1982) 2133.

  4. 4.

    R. T. Richardson,ibid. 15 (1980) 2569.

  5. 5.

    M. S. Baythoun andF. R. Sale,ibid. 17 (1982) 2757.

  6. 6.

    H. Laville andJ. C. Bernier,ibid. 15 (1980) 73.

  7. 7.

    N. I. Sax, “Dangerous Properties of Industrial Materials” (Von Nostrand Rheinhold, New York, 1979) p. 659.

  8. 8.

    Joint Committee on Powder Diffraction Standards (Swarthmore, Pennsylvania) Power Diffraction File.

  9. 9.

    K. J. Standley, “Oxide Magnetic Materials” 2nd edn (Clarendon Press, Oxford, 1972) p. 158 and p. 77.

  10. 10.

    R. Moskalewicz, in Proceedings of the 1st European Symposium on Thermal Analysis, Salford, September 1976, edited by D. Dollimore (Heyden, London, 1976) p. 25.

  11. 11.

    R. M. Bozorth, J. F. Dillinger andG. A. Kelsall,Phys. Rev. 45 (1934) 742.

  12. 12.

    G. A. Kelsall,Physics 5 (1934) 169.

  13. 13.

    R. T. Richardson, unpublished work.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Gallacher, D.G., Richardson, R.T. & Willey, R.J. The effects of magnetic quenching on glassy barium ferrite. J Mater Sci 19, 1277–1282 (1984). https://doi.org/10.1007/BF01120039

Download citation

Keywords

  • Magnetic Field
  • Ferrite
  • Barium
  • Thin Section
  • Powder Diffraction