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Structural relaxation of PbO–WO3–P2O5 glasses

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Abstract

The structural relaxation of three compositional series of PbO–WO3–P2O5 glasses with composition (0.5 − x/2)PbO·xWO3·(0.5 − x/2)P2O5, x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5; 0.5PbO·xWO3·(0.5 − x)P2O5, x = 0, 0.1, 0.2, and 0.3; and (0.5 − x)PbO·xWO3·0.5P2O5, x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5 was studied by thermomechanical analysis. The structural relaxation was studied in the transformation region using the Tool–Narayanaswamy–Moynihan’s and Tool–Narayanaswamy–Mazurin’s models. The relaxation function of Kohlrausch Williams and Watts was used. The parameters of both models were calculated by nonlinear regression analysis of thermodilatometric curves measured by thermomechanical analyzer under the constant load. Both models very well describe the experimental data. It was found that the modulus is increasing with increasing amount of WO3 in all glasses. On the contrary, the width of the spectrum of relaxation times is decreasing with increasing amount of WO3 in all studied glasses. Both models possess the values of metastable melt thermal expansion coefficient equal to their experimental value.

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Acknowledgments

This work was supported by the Slovak Grant Agency for Science under the grant VEGA 1/0006/12 and the bilateral project evaluation SK-CZ-0007-11. This publication was created in the frame of the project ZDESJE, ITMS code 26220220084, of the Operational Program Research and Development funded from the European Fund of Regional Development. This work was supported by the Slovak Research and Development Agency Project ID: APVV-0487-11. The Czech authors are grateful for the financial support from the Grant Agency of the Czech Republic (Grant No. 13-00355S).

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Authors and Affiliations

  1. Vitrum Laugaricio, Joint Glass Center of IIC SAS, TnU AD, RONA, and FChPT STU, Študentská 2, 911 50, Trenčín, Slovakia

    Mária Chromčíková, Marek Liška & Magdaléna Lissová

  2. Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic

    Petr Mošner & Ladislav Koudelka

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  1. Mária Chromčíková
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  2. Marek Liška
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  5. Ladislav Koudelka
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Correspondence to Mária Chromčíková.

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Chromčíková, M., Liška, M., Lissová, M. et al. Structural relaxation of PbO–WO3–P2O5 glasses. J Therm Anal Calorim 114, 947–954 (2013). https://doi.org/10.1007/s10973-013-3082-7

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  • DOI: https://doi.org/10.1007/s10973-013-3082-7

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