Journal of Applied Physics · 1956 · 28 citations · 1 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic AnalysisCeramic MaterialsCeramicsDielectric CeramicsDielectric PropertiesDielectric ResponseDielectricsElectrical Properties Of CeramicsFerroelectric MaterialsBarium Titanate CeramicsCalcinationCeramic DielectricsCeramic Radiation DamageDielectric ConstantDielectric Constant MeasurementRadiation Damage In CeramicsTemperature Dependence Of Electrical Properties
A specimen of ceramic BaTiO3, made of reagent-grade materials at a calcination temperature of 1250°C, was exposed to pile irradiation in the amount of nvt=2.1·1020 at Hanford, Washington. The original ceramic showed a peak in the dielectric constant versus temperature curve usually ascribed to ferroelectricity. After irradiation this peak essentially disappeared, and the dielectric constant was reduced to a nearly constant value over the temperature range 30°C to 140°C. This reduced value is about half of the room-temperature dielectric constant as determined before irradiation. Evidence is mentioned for a small residual peak in the dielectric constant of the irradiated specimen.
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