The effect of microstructural changes which occurred during crystallization in this glassy Ag ion-conducting system was studied by means of impedance spectroscopy and high-temperature X-ray diffraction. A non-destructive procedure was used for  in situ  determination of the glass crystal interfacial area within the forming composites. It was found that the variation in the interface area was almost proportional to an observed anomalous increase in the conductivity during crystallization. It was suggested that an interfacial mechanism was responsible for the conductivity enhancement.

S.Adams, K.Hariharan, J.Maier: Solid State Ionics, 1995, 75, 193-201