Crystallization kinetics of new heavy metal oxide glasses within the Sb₂O₃-Na₂O-WO₃-PbO system

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• 作者：M. Ç ; elikbilek Ersundu^a ; ^{miray@yildiz.edu.tr" class="auth_mail" title="E-mail the corresponding author} ; A.E. Ersundu^a ; M.T. Soltani^b ; M. Baazouzi^b
• 关键词：Heavy metal oxide glasses ; Senarmontite ; Crystallization kinetics ; Non-isothermal methods
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：491-497
• 全文大小：1560 K

文摘

Crystallization kinetic studies of new quaternary antimonite glasses within the Sb₂O₃-Na₂O-WO₃-PbO system were performed by non-isothermal methods using differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The kinetic parameters n and m which determine crystallization reaction mechanism in glasses were obtained using experimental values of the crystallized volume fraction, χ, by applying Ozawa method. Values of n and m were found as 1 indicating surface crystallization which was confirmed by SEM investigations. The values of crystallization activation energy were calculated in the range of 234–272 kJ/mol by using seven different theoretical models. The calculated crystallization activation energy values were associated with the crystallization of cubic crystalline senarmontite phase of Sb₂O₃.