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Microscopic Origins of Compositional Trends in Aluminosilicate Glass Properties
Author(s) -
Smedskjaer Morten M.,
Mauro John C.,
Kjeldsen Jonas,
Yue Yuanzheng
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12298
Subject(s) - aluminosilicate , fragility , thermal expansion , materials science , molar volume , mineralogy , bulk modulus , shear modulus , refractive index , sodium aluminosilicate , thermodynamics , composite material , chemistry , organic chemistry , physics , optoelectronics , catalysis
Revealing and understanding the microscopic origins of the macroscopic properties of aluminosilicate glasses is important for the design of new glasses with optimized properties. In this work, we study the composition‐structure‐property relationships in 20 MgO / CaO sodium aluminosilicate glasses upon Al 2 O 3 ‐for‐ SiO 2 and MgO ‐for‐ CaO substitutions. We find that some properties (density, molar volume, Young's modulus, and shear modulus) are linear through the investigated range of Al 2 O 3 compositions, while others (refractive index, coefficient of thermal expansion, Vickers hardness, isokom temperatures, and liquid fragility index) exhibit a change in the slope around the composition with [ Al 2 O 3 ] = [ Na 2 O ], which is especially pronounced for the glasses containing MgO . We discuss these phenomena based on structural information obtained by NMR spectroscopy and topological considerations.