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Dielectric relaxation and a.c. conductivity of titanium-substituted iron in boron-based glasses

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Abstract

The a.c. conductivity and dielectric properties of the glass system B2O3-BaO-Pb3O4-Fe2O3-TiO2 have been investigated for different Fe2O3-TiO2 ratios, while the content of B2O3, BaO, and Pb3O4 were kept constant and equal to 60, 20, and 5 mol %, respectively. The results of the a.c. conductivity could be explained in terms of the correlated barrier hopping and the overlapping large-polaron tunneling models. The dielectric properties have also been investigated considering the dipolar relaxation model. A good agreement between the experimental data and the Cole–Cole equation have been obtained. The addition of small amounts of TiO2 strongly affected the dielectric properties of the glasses under investigation.

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Authors and Affiliations

  1. Physics Department, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt

    A. G. Mostafa

  2. Physics, Department, Faculty of Science, South Valley University, Aswan, Egypt

    F. Abdel-Wahab & G. A. Yahya

Authors
  1. A. G. Mostafa
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  2. F. Abdel-Wahab
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  3. G. A. Yahya
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Mostafa, A.G., Abdel-Wahab, F. & Yahya, G.A. Dielectric relaxation and a.c. conductivity of titanium-substituted iron in boron-based glasses. Journal of Materials Science: Materials in Electronics 13, 721–725 (2002). https://doi.org/10.1023/A:1021517122268

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  • DOI: https://doi.org/10.1023/A:1021517122268

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