Pressure- and temperature-dependence of elastic properties of a ZBLAN glass

The hydrostatic and uni-axial pressures, and the temperature-dependence of elastic properties of a 53ZrF4-20BaF2-4LaF3-3AlF3-20NaF (ZBLAN) glass were determined by ultrasonic pulse-echo techniques. The experimental results are used to obtain elastic constants of the glass. The normal behavior of negative temperature-dependence and positive pressure-dependence of the ultrasonic velocities were observed for this glass. The pressure-derivative of shear modulus and bulk modulus, and the longitudinal and shear acoustic mode Gruneisen parameters are all positive (∂S/∂P=0.92, ∂B/∂P=5.30, γ11=1.89 and γ44=0.83).