Microscopic origins of compositional trends in aluminosilicate glass properties

Morten M. Smedskjaer, John Mauro, Jonas Kjeldsen, Yuanzheng Yue

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


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 2O3-for-SiO2 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 Al2O 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 2O3] = [Na2O], which is especially pronounced for the glasses containing MgO. We discuss these phenomena based on structural information obtained by NMR spectroscopy and topological considerations.

Original languageEnglish (US)
Pages (from-to)1436-1443
Number of pages8
JournalJournal of the American Ceramic Society
Issue number5
StatePublished - May 1 2013

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry


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