Ionic conductivity of YSZ single crystals with high density dislocations

Abstract

Zirconia single crystals oriented for single slip were compressed at 1300°C in order to investigate change in their ionic conductivity by dislocations. The conductivity of deformed crystals was measured at 250 to 700°C using the complex impedance measurement by A.C. source with 0.1 to 32 MHz. As a result, in case that applied voltage direction was parallel to edge dislocation lines introduced by primary slip system, ionic conductivity improved with increasing plastic strain. It was found that introduction of dislocations enhanced ionic conductivity of zirconia single crystals.