Elastic moduli of calcium alumino-silicate glasses studied by Brillouin scattering

Brillouin scattering was used to investigate the elastic properties of calc ium alumino-silicate glasses. The Brillouin frequency shifts, along with th e measurements of density and refractive index, allowed the calculation of sound velocities and elastic constants. The values of elastic moduli (inclu ding Young's modulus, bulk modulus, shear modulus, and Poisson ratio), deri ved from experimental data for our glasses, were much larger those for pure SiO2 glass. These values were compared with those calculated in terms of e xisting theories. (C) 2000 Elsevier Science Ltd. All rights reserved.