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Thermal properties, density and structure of percalcic and peraluminus CaO-Al2O3-SiO2 glasses

Abstract : Calcium silicate and aluminosilicate glasses with various SiO2 contents (10-76 mol%) were prepared in the wide range of [Al2O3]/[CaO] molar ratio from 0.10 to 4.00 by conventional melt-quenching method and an aerodynamic levitation device for a part of peraluminus glasses. Variations of glass transition temperature, the coefficient of linear expansion, and ionic packing factor derived from density measurements with [Al2O3]/[CaO] molar ratio were studied. The glass structures of SiO4 three dimensional network, mixed anions of (Si, Al)O4 tetrahedra, isolated AlO4 and Al-O-Al linkages were evaluated by FT-IR measurements. Compositional dependences of the properties are qualitatively related to the glass structure examined by IR spectroscopy and the proportions of AlOx (x = 4, 5, 6) species evaluated in a previous study by using 27Al MQ NMR spectroscopy.
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Submitted on : Friday, February 18, 2022 - 2:02:35 PM
Last modification on : Wednesday, August 24, 2022 - 6:28:43 PM

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Shoji Takahashi, Daniel R. Neuville, Hiromichi Takebe. Thermal properties, density and structure of percalcic and peraluminus CaO-Al2O3-SiO2 glasses. Journal of Non-Crystalline Solids, Elsevier, 2015, 411, pp.5-12. ⟨10.1016/j.jnoncrysol.2014.12.019⟩. ⟨insu-03580009⟩

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