ANELASTICITY AND VISCOSITY OF SUPERIONIC CONDUCTING GLASSES

The anelasticity and viscosity of AgI-AgPO3 glasses have been measured from room temperature up to near the glass transition temperature by shearing a cubic specimen under a constant load and observing the time-dependence of the shear strain by an optical method. The data were analyzed by adopting a mechanical model of the standard linear solid + a viscous solid, and the viscosity, the anelastic modulus and the anelastic relaxation time have been determined. The viscosity and the anelastic modulus decreased with temperature, while the relaxation time had no apparent temperature dependence. The results for two glasses, AgPO3 and (AgI)(0.5)(AgPO3)(0.5), are presented and some qualitative discussions are given on the basis of the microscopic structures of materials.