Abstract
A low-melting water-resistant 40P 2O 5-50PbO-10ZnO glass with a glass transition temperature T g ≅ 338°C has been prepared. Differential thermal analysis (DTA), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) absorption spectroscopy techniques were applied for both qualitative and quantitative characterization and crystallization of (Pb 5/6Zn 1/6) 3P 4O 13 in glass. Kinetics of crystallization was analyzed based on the Johnson-Mehl-Avrami model. It was found that the surface nucleation mode, having the morphology index n ≅ 1, is dominant. The activation energy of crystallization was found to be 312 kJ mol −1 by a non-isothermal DTA method, while 363 and 344 kJ mol −1 by isothermal XRD and FTIR methods, respectively. These values agree with each other to a reasonable extent. Peak intensity of a specific vibrational mode in FTIR absorption spectra was found to be applicable for quantitative kinetic analysis should suitable calibration using a standard specimen be done.
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