Fabrication of Porous Al2 O 3 ‐ AgI Composites with Enhanced Ionic Conductivity

Abstract

A novel method to fabricate a composite in the system was examined. It was prepared by precipitating from and solutions within micropores of an matrix under an electric field. The precipitate initially formed nearly at the center of the matrix and then preferentially grew toward the solution, suggesting that only Ag+ ion could move easily in it. The relatively dense precipitate was identified to be by both x‐ray diffraction and electron probe for microanalysis. The composites showed conductivities a few to several times higher than pure below the β‐ to α‐phase transition temperature.