Effects of B2O3 substitution for Al2O3 on the crystallization and properties of translucent mica glass-ceramics |
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Affiliation: | 1. Departamento de Química e Ingeniería de Procesos y Recursos, Universidad Cantabria, Avda. Los Castros s/n, 39005 Santander, Spain;2. Laboratorio de Rayos-X, Centro de Investigación, Ciencia y Tecnología de la Universidad de Sevilla (CITIUS). Avda. Reina Mercedes, 4., 41012 Sevilla, Spain;3. Instituto Ciencia de los Materiales de Sevilla (CSIC-US), Avda. Reina Mercedes, 49, 41092 Sevilla, Spain |
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Abstract: | The effects of substituting Al2O3 with B2O3 on the structure, crystallization, mechanical properties, thermal properties and optical properties of translucent mica glass-ceramics were thoroughly investigated. The results demonstrated that the addition of 0.5 wt% B2O3 was optimum for glass precipitation, which increases the crystallinity of glass-ceramics and provides good translucency. When the content of B2O3 was greater than 0.5 wt%, both crystallinity and translucency decreased noticeably. The replacement of B2O3 for Al2O3 had no influence on the type of crystal phase and the precipitation of tetrasilicic fluoromica with non-stoichiometric ratio, while it did have an effect on the crystallinity and structure. The crystal sizes of glass-ceramics were in the nanoscale range and the transmittance test results indicated that they exhibit excellent translucency. |
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Keywords: | Tetrasilicic fluoromica Boron-substitution Optical properties Crystallization behavior |
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