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Density-structure predictions of silicate glasses containing Ga2O3

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Abstract

The density data of Li2O-, Na2O-, CaO- and BaO-Ga2O3-SiO2 glasses have been analyzed. The analysis is based on a structural model predicted from the results of the current spectroscopic investigations. It is assumed that for (R2O or RO)/Ga2O3 = 1 the modifier oxide is used only by the gallate network to form GaO4 tetrahedra without non-bridging oxygen ions. For 1 < (R2O or RO)/Ga2O3 ≤ 2 the excess of modifier form non-bridging oxygen ions in the gallate network. There is a remarkable difference between the determined and the calculated density for Ga2O3/SiO2 > 0.75. This is suggestive for a different distribution of the modifier oxide between the two networks. Empirical relations have been obtained to calculate the density as a function of the composition.

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Authors and Affiliations

  1. Glass Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura, 35516, POB 83, Egypt

    H. Doweidar, G. El-Damrawi & S. Abd El-Maksoud

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  1. H. Doweidar
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  2. G. El-Damrawi
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  3. S. Abd El-Maksoud
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Doweidar, H., El-Damrawi, G. & El-Maksoud, S.A. Density-structure predictions of silicate glasses containing Ga2O3 . Journal of Materials Science 37, 4703–4709 (2002). https://doi.org/10.1023/A:1020681206750

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