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Structure and physical properties of sodium antimony germanate glasses

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Abstract

The structure and physical properties of sodium antimony germanate glasses with compositions 10Na2O − xSb2O3 − (90 − x)GeO2, x = 10−30 mol%, prepared by the melt-quenched route have been studied. It is observed from x-ray diffraction, SEM, density and oxygen molar volume, infrared (IR), differential thermal analysis (DTA), and optical absorption that single phase homogeneous glasses with a random network structure can be obtained in this system. The strength and connectivity of the glass network increase with GeO2 content. The main Ge−O stretching vibration also shifts to higher wavelength side. Two oxidation states of antimony, Sb3+ and Sb5+, are present, while the so-called “germanate anomaly” is absent in these glasses. This study discusses the probable structural reasons behind this type of behavior of these glasses.

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  1. MLS Lab, Indian Association for the Cultivation of Science, 700 032, Calcutta, India

    M. Pal

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  1. M. Pal
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Pal, M. Structure and physical properties of sodium antimony germanate glasses. Journal of Materials Research 11, 1831–1835 (1996). https://doi.org/10.1557/JMR.1996.0231

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  • DOI: https://doi.org/10.1557/JMR.1996.0231

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