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Electrode and grain-boundary effects on the conductivity of CaCu3Ti4O12
113
Citations
16
References
2005
Year
EngineeringThermoelectricsCeramic PowdersElectrical PropertiesGrain-boundary EffectsGrain BoundariesElectronic ConductorsSuperconductivityCalcium AluminateCeramic TechnologyTemperature Range 173Materials ScienceMaterials EngineeringElectrical EngineeringSolid-state IonicCeramic MaterialElectrical PropertyElectrochemistryDielectric RelaxationsApplied PhysicsCeramics MaterialsMetal-ceramic SystemsThermal Properties
The ac conductivity of CaCu3Ti4O12 (CCTO) ceramics was studied in the temperature range 173<T<443K. The dc conductivities containing the components of electrodes (σe) and grain boundaries (σgb) were measured, from which a thermal activation energies of ∼0.54eV was inferred. Different behaviors of dielectric relaxations are responsible for the two contributing components.
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