Journal
PHILOSOPHICAL MAGAZINE
Volume 90, Issue 33, Pages 4429-4441Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2010.507178
Keywords
tellurite glass; crystallization kinetics; differential thermal analysis
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Tellurite glasses of the system xWO3-75TeO2-(25 - x)B2O3 (0 x 25 mol. %) were prepared and studied by differential thermal analysis to explore the effect of WO3 on their glass transition and crystallization kinetics. The crystallization kinetics was studied under non-isothermal conditions using the formal theory of transformations for heterogeneous nucleation. The crystallization results were analyzed and both the activation energy of the crystallization process and the crystallization mechanism characterized. The phases into which the glass crystallizes were identified by X-ray diffraction. Diffractograms of the transformed material indicate the presence of microcrystallites of -tellurite, Te0.95W0.05O2.05, Te2W and B2O3 in the amorphous matrix.
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