Elastic moduli of borosilicate glasses doped with heavy metal oxides

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• 作者：Cherdsak Bootjomchai ; ^{cherdsak_per@hotmail.co.th" class="auth_mail} ; Raewat Laopaiboon ; Somkid Pencharee ; Jintana Laopaiboon
• 关键词：Amorphous materials ; Glasses ; Structural materials ; Ultrasonic measurements ; Elastic properties
• 刊名：Journal of Non-Crystalline Solids
• 出版年：15 March, 2014
• 年：2014
• 卷：388
• 期：Complete
• 页码：37-45
• 全文大小：734 K

文摘

Comparative studies on the theoretical and experimental values of elastic moduli of the borosilicate glasses (70-x)SiO₂-30B₂O₃-xHMOs glass system, where HMOs (heavy metal oxides) are TiO₂, BaO and Bi₂O₃ with 0, 1, 2, 3, 4 and 5 mol% of each HMO, were investigated. Elastic moduli were assessed by measuring the ultrasonic velocities. The number of network bonds per unit volume, the average of a stretching force constant, the average of cross-link density, the average of ring diameter and the theoretical bond compression bulk modulus were calculated by using a theoretical bond compression model to confirm the obtained results from the experiments. The results show that changes in the structure of the glass depend on a type and concentration of HMOs. Moreover, the experimental elastic moduli are in good agreement with the theoretical values.