TY - JOUR
T1 - Structure-property relations in calcium aluminate glasses containing different divalent cations and SiO2
AU - Sebdani, Maryam M.
AU - Mauro, John C.
AU - Jensen, Lars R.
AU - Smedskjaer, Morten M.
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2015/8/11
Y1 - 2015/8/11
N2 - Calcium aluminate glasses are transparent in the infrared region, exhibit ultralow optical losses, and possess excellent mechanical properties. However, these systems exhibit poor glass-forming ability, and it is therefore important to understand their composition-structure-property relations to enable the design of new compositions with optimized properties and glass-forming ability. In this paper, we study the structure-property relationships in CaO-Al2O3 based glasses with different additives (SiO2, MgO, SrO, BaO, and ZnO). Our results reveal a gradual change in all the measured properties (molar volume, hardness, crack resistance, glass transition temperature, and liquid fragility) upon the addition of SiO2 to the eutectic 64CaO-36Al2O3 composition and the partial substitution of CaO for different divalent cation oxides. The relation between the measured liquid fragility index and the glass-forming ability is also investigated. We discuss these phenomena based on structural information obtained by Raman spectroscopy and topological considerations.
AB - Calcium aluminate glasses are transparent in the infrared region, exhibit ultralow optical losses, and possess excellent mechanical properties. However, these systems exhibit poor glass-forming ability, and it is therefore important to understand their composition-structure-property relations to enable the design of new compositions with optimized properties and glass-forming ability. In this paper, we study the structure-property relationships in CaO-Al2O3 based glasses with different additives (SiO2, MgO, SrO, BaO, and ZnO). Our results reveal a gradual change in all the measured properties (molar volume, hardness, crack resistance, glass transition temperature, and liquid fragility) upon the addition of SiO2 to the eutectic 64CaO-36Al2O3 composition and the partial substitution of CaO for different divalent cation oxides. The relation between the measured liquid fragility index and the glass-forming ability is also investigated. We discuss these phenomena based on structural information obtained by Raman spectroscopy and topological considerations.
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U2 - 10.1016/j.jnoncrysol.2015.07.047
DO - 10.1016/j.jnoncrysol.2015.07.047
M3 - Article
AN - SCOPUS:84938889244
VL - 427
SP - 160
EP - 165
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
ER -