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

Shoji Takahashi , Daniel R. Neuville (1) , Hiromichi Takebe

1 IPGP - Institut de Physique du Globe de Paris

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 AlO_x (x = 4, 5, 6) species evaluated in a previous study by using ²⁷Al MQ NMR spectroscopy.

Keywords: Aluminosilicate glass; Infrared spectroscopy; Thermal properties; Density; Structure

Domains: Sciences of the Universe [physics]

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, 2015, 411, pp.5-12. ⟨10.1016/j.jnoncrysol.2014.12.019⟩. ⟨insu-03580009⟩