Chen D, Groß A, Bono D C, et al. Electrical conductivity relaxation measurements: Application of low thermal mass heater stick[J]. Solid State Ionics, 2014, 262: 914-917.

ABSTRACT

The widely used electrical conductivity relaxation technique for extracting kinetic data such as diffusivity andsurface reaction rates typically relies on monitoring relaxations following changes inpO2rather than changesintemperature.In thisstudy, we demonstrate the utility in examining conductivity relaxation upon rapidchangesin temperature to aid in deconvoluting defect migration and formation energies. This is achieved by the use of alow thermal mass heater stick enabling rapid variations in sample temperature. We apply this technique to aspecimen of Pr0.1Ce0.9O2−δto determine the reduction (Hr) and carrier mobility (Hm,i) energies. We furtherillustrate the ability to extract activation energies, with high precision, over narrow temperature ranges, bysinusoidal variation in temperat