ANELASTIC AND VISCOUS PROPERTIES OF AGI-AGPO3 GLASS

The anelasticity (mechanical relaxation) and the viscosity of AgI-AgPO3 superionic conducting glass have been studied from room temperature up to near the glass transition temperature. The viscoelastic behavior was measured by shearing a cubic specimen and observing the time dependence of the shear strain using an optical method. The data were analyzed by adopting a mechanical model of standard linear solid+viscous solid, and the viscosity, the anelastic relaxation time, and the anelastic modulus have been determined. The results for the (AgI)0.5(AgPO3)0.5 glass were as follows. The viscosity and anelastic modulus decrease slowly and then rapidly as the temperature is increased up to the glass transition. The anelastic relaxation time is almost temperature independent, and another relaxation with a-different relaxation time is superposed at temperatures close to the transition.