Time domain reflectometry study of fast-ionic-conducting glasses

Dielectric data on model fast-ionic-conducting glasses are reported at various sub-Tg temperatures. A transformer bridge was used from 100 Hz to 200 kHz, while data between 85 MHz and 2 GHz were obtained by time domain reflectometry. Substantial improvements in the sensitivity and equivalent frequency range of the latter correct previous preliminary results reporting the existence and temperature dependence of apparent dielectric permittivity plateaus in the upper MHz spectral region of glasses.