Authors: Neha Gupta Anshuman Dalvi
Publish Date: 2011/01/05
Volume: 17, Issue: 4, Pages: 315-322
Abstract
The crystallization and glass transition kinetics using differential scanning calorimetry DSC in 50AgI–3333Ag2O–1667V2O51−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 MatusitaSakka 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 = 03 ~10−3 Ω−1 cm−1 at 30 °C which is comparable to that of the host 50AgI–3333Ag2O–1667V2O5 glassy system The parameters obtained from σ–T plots and DSC scans do complement each other in a particular range of compositionThis work is supported by Department of Science and Technology India SERC project SR/FTP/PS77/2005 and University Grant Commission special assistance program India Thanks are also due to Dr AM Awasthi UGCDAE CSR Indore India for suggestions and useful discussions We sincerely thank Mr S Bhardwaj and Dr N P Lalla UGCDAE CSR Indore India for XRay diffraction measurements
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