Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7901055 | Journal of Non-Crystalline Solids | 2015 | 8 Pages |
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Shoji Takahashi, Daniel R. Neuville, Hiromichi Takebe,