Defect chemistry of donor-doped BaTiO<sub>3</sub>with BaO-excess for reduction resistant PTCR thermistor applications – redox-behaviour
Christian Pithan, Hayato Katsu, Rainer Waser
Abstract
The electrical conductivity of donor-doped BaTiO<sub>3</sub>thermistor ceramics with excessive BaO revealing a reduction-persistent PTCR effect has been carefully examined depending on materials’ composition and oxygen partial pressure at moderate temperatures between 973 and 1273 K.
Topics & Concepts
ThermistorDopingElectrical resistivity and conductivityRedoxPartial pressureCeramicAnalytical Chemistry (journal)ConductivityMaterials scienceReduction (mathematics)MineralogyChemistryOxygenInorganic chemistryElectrical engineeringOptoelectronicsPhysical chemistryMetallurgyOrganic chemistryGeometryEngineeringMathematicsFerroelectric and Piezoelectric MaterialsElectrical and Thermal Properties of MaterialsMicrowave Dielectric Ceramics Synthesis