Elastic moduli of XAlSiO4 aluminosilicate glasses: effects of charge-balancing cations.

Brillouin spectroscopy is used to investigate the elastic properties of XAlSiO 4 aluminosilicate glasses where X = Li, Na, K, Mg 0.5 , Ca 0.5 , Sr 0.5 , Ba 0.5 , and Zn 0.5 . The Brillouin frequency shifts obtained in two different scattering geometries allow the calculation of the refractive index, the two sound velocities and Poisson's ratio. Measurements of the mass density give in turn the elastic moduli and the Debye temperature. We find that the elastic properties scale with the atomic density of the glassy network or the charge-balancing cation field strength while they negatively correlate with the glass transition temperature. Further, Poisson's ratio depends on the nature of the non-framework cations in this glass series. [ABSTRACT FROM AUTHOR]