Abstract
The crystallization and glass transition kinetics using differential scanning calorimetry (DSC) in 50AgI–33.33Ag2O–16.67[(V2O5)1−x –(MoO3) x ] superionic glassy system is discussed. Thermal stability of glass, studied using various criteria, does not vary significantly with glass former variation. However, the activation energies for structural relaxation (E s) at glass transition temperature and crystallization (E c) obtained using Moynihan and Kissinger, Matusita-Sakka formulations found to exhibit interesting trends with MoO3 substitution in the glass matrix. It is noticed that the electrical conductivity (σ)–temperature (T) cycles obtained at a typical heating rate of 1 °C/min do exhibit significant thermal events. The conductivity after first heating cycle at room temperature is found to be increasing with MoO3 content and maximum for x = 0.3 (~10−3 Ω−1 cm−1 at 30 °C) which is comparable to that of the host 50AgI–33.33Ag2O–16.67V2O5 glassy system. The parameters obtained from σ–T plots and DSC scans do complement each other in a particular range of composition.
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Acknowledgments
This work is supported by Department of Science and Technology, India SERC project SR/FTP/PS-77/2005 and University Grant Commission special assistance program, India. Thanks are also due to Dr. A.M. Awasthi (UGC-DAE CSR, Indore (India)) for suggestions and useful discussions. We sincerely thank Mr. S. Bhardwaj and Dr. N. P. Lalla (UGC-DAE CSR, Indore (India)) for X-Ray diffraction measurements.
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Gupta, N., Dalvi, A. Effect of mixed glass formers on the crystallization kinetics in AgI–Ag2O–V2O5–MoO3 glassy superionic system. Ionics 17, 315–322 (2011). https://doi.org/10.1007/s11581-010-0509-z
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DOI: https://doi.org/10.1007/s11581-010-0509-z