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Inward Cationic Diffusion and Percolation Transition in Glass–Ceramics

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We show the quantitative correlation between the degree of crystallization and the cationic diffusion extent in iron-containing diopside glass–ceramics at the glass transition temperature. We find a critical degree of crystallization, above which the diffusion extent sharply drops with the degree of crystallization. Below the critical value, the diffusion extent decreases only slightly with the degree of crystallization. No cationic diffusion is observed in the fully crystalline materials. The critical value might be associated with a percolation transition from an interconnected to a disconnected glass phase.
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Document Type: Research Article

Affiliations: 1: Section of Chemistry, Aalborg University, DK-9000 Aalborg, Denmark 2: Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark

Publication date: August 1, 2010

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