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The synthesis and characterisation of Co2X (Ba2Co2Fe28O46) and Co2U (Ba4Co2Fe36O60) ferrite fibres, manufactured from a sol-gel process

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Abstract

The X and U phases of hexagonal ferrites are notoriously difficult to make as pure materials, and what little data there is published regarding their physical or magnetic properties relates only to single crystals. Stoichiometric Co2X and Co2U fibres were made from a sol-gel based process, and the characteristics of the sols and fibres were studied using PCS, XRD, SEM and VSM. The evolution of the X and U fibres was studied, and shown to be similar that of the W and Z fibres whose structures they respectively resemble. Co2X and Co2U had been formed at 1200°C, and the morphology of the fibres was different from those of the W and Z phases. The magnetic properties, again while resembling the W and Z phases, were different to any of the other hexagonal ferrite fibres. The magnetic hysteresis loops of both fibres were magnetically as was, the Co2X fibres having M s = 45.0 emu g−1 and H c = 0.085 T, and the Co2U fibres having M s = 51.5 emu g−1 and H c = 0.059 T.

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References

  1. G. H. Jonker, H. P. J. Wijn and P. B. Braun, Phil. Tech.Rev. 18 (1956) 145.

    Google Scholar 

  2. J. Smit and H. P. J. Wijn, “Ferrites” (Philips Technical Library, Eindhoven, 1959).

    Google Scholar 

  3. G. A. Jones, S. F. H. Parker, J. G. Booth and D. S. Simkin, IEEE Trans.Mag. MAGN-26 (1990) 2804.

    Google Scholar 

  4. A. Tauber, J. S. Megill and J. R. Shappirio, J.Appl. Phys. 41 (1970) 1353.

    Google Scholar 

  5. J. A. Kohn, D. W. Eckart and C. F. Cook Jr., Science 172(3983) (1971) 519.

    Google Scholar 

  6. A. J. Kerecman, A. Tauber, T. R. Avlon and R. O. Savage, J.Appl.Phys. 39 (1968) 726.

    Google Scholar 

  7. R. C. Pullar, S. G. Appleton and A. K. Bhattacharya, J.Magn.Mag.Mat. 186 (1998) 326.

    Google Scholar 

  8. R. C. Pullar, M. D. Taylor and A. K. Bhattacharya, J.Mater.Sci. 32 (1997) 365.

    Google Scholar 

  9. Idem., ibid. 32 (1997) 873.

  10. R. C. Pullar, S. G. Appleton, M. H. Stacey, M. D. Taylor and A. K. Bhattacharya, J.Magn.Mag.Mat. 186 (1998) 313.

    Google Scholar 

  11. M. J. Morton, J. D. Birchall and J. E. Cassidy, UK Patent no. 1360197 (July 1974).

  12. C. Suryanarayana and M. Grant norman, “X-Ray Diffraction—A Practical Approach” (Plenum Press, New York, 1998) p. 212.

    Google Scholar 

  13. R. C. Pullar, M. H. Stacey, M. D. Taylor and A. K. Bhattacharya, Acta Mat., submitted.

  14. R. C. Pullar and A. K. Bhattacharya, J.Magn.Mag. Mat., submitted.

  15. Idem., J.Phys.D, submitted.

  16. Idem., J.Magn.Mag.Mat., submitted.

  17. R. C. Pullar, unpublished work.

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  1. Warwick Process Technology Group, School of Engineering, University of Warwick, Coventry, CV4 7AL, UK

    R. C. Pullar & A. K. Bhattacharya

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  1. R. C. Pullar
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  2. A. K. Bhattacharya
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Pullar, R.C., Bhattacharya, A.K. The synthesis and characterisation of Co2X (Ba2Co2Fe28O46) and Co2U (Ba4Co2Fe36O60) ferrite fibres, manufactured from a sol-gel process. Journal of Materials Science 36, 4805–4812 (2001). https://doi.org/10.1023/A:1017947625940

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