Diffusion across the glass transition in silicate melts: Systematic correlations, new experimental data for Sr and Ba in calcium-aluminosilicate glasses and general mechanisms of ionic transport

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• 作者：Sara Fanara^a ; ^{Sara.Fanara@geo-uni.goettingen.de} ; Pranesh Sengupta^b ; Hans-Werner Becker^c ; Detlef Rogalla^c ; Sumit Chakraborty^a ; ^c
• 关键词：Ionic diffusion ; Silicate melt ; Glass ; Glass transition ; Thin films ; Pulsed laser deposition ; Rutherford back-scattering spectroscopy ; Calcium-aluminosilicate glasses
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：455
• 期：Complete
• 页码：6-16
• 全文大小：1497 K
• 卷排序：455

文摘

The systematic between viscosity and diffusivity is explored based on published data. Sr and Ba diffusion coefficients are measured in calcium aluminosilicate glasses. Generalized expressions predicting cations diffusion coefficients are provided. The nature of diffusion in glassy and molten states is analyzed.