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Mössbauer study of the dynamical properties of some lead borate glasses near their transformation temperature

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Abstract

Calcium-lead-borate glasses containing iron were thoroughly studied by Mössbauer effect spectroscopy aiming to determine both their Debye temperature and their transformation temperature during heating. The obtained Mössbauer effect parameters at room temperature exhibit dispersion of iron ions in a low spin ferric state as modifying cations in a pure amorphous glass matrix. The electric field gradient due to the lattice was stabilized at moderate and high lead oxide content glasses. The high-temperature measurements were carried out between 300 and 750 K under vacuum. It can be concluded that the recoil-free fraction decreased and the mean square amplitude of the Mössbauer atom increased as the temperature was increased. From the Inf againstT curve, the Debye temperature of the solid glass can be calculated (θD = 373.8K). The experimentally determined transformation temperature from this study was found to be 665 K, which may be slightly less than the real value.

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Author notes

  1. A. G. Mostafa

    Present address: Department of Physics, Junior College for Teachers, P.O. Box 4341, 11491, Riyadh, Kingdom of Saudi Arabia

Authors and Affiliations

  1. Faculty of Science in Aswan, Aswan, Egypt

    A. G. Mostafa & R. M. Awadallah

  2. Department of Physics, Faculty of Science, Al-Azhar University, Nasr-City, Cairo, Egypt

    M. Sanad & S. H. Salah

Authors
  1. A. G. Mostafa
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  2. R. M. Awadallah
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  3. M. Sanad
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  4. S. H. Salah
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Mostafa, A.G., Awadallah, R.M., Sanad, M. et al. Mössbauer study of the dynamical properties of some lead borate glasses near their transformation temperature. J Mater Sci 21, 965–970 (1986). https://doi.org/10.1007/BF01117380

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  • DOI: https://doi.org/10.1007/BF01117380

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