Elastic properties of float glass and SiO2+TiO2 glass under high pressure

Compressional and shear wave velocities have been measured as functions of pressure up to 2 GPa for float glass and SiO2 + 8.4 wt% TiO2 glass using pu lse superposition method. The compressional wave velocities for float glass are found to increase first,then decrease with increasing pressure. This p henomenon is different from that of other glasses. The shear wave velocitie s of neat glass and both compressional and shear wave velocities of SiO2 8.4 wt % TiO2 decrease with in creasing pressure as general SiO2 glass. The experimental results are discussed. And the state parameters in Murnaghan equation have been calculated.