Berichte der Bunsengesellschaft für physikalische Chemie · 1991 · 34 citations · 6 references
Natural SciencesMaterials SciencePhysicsCeramic MaterialsMaterials ChemistryMaterials PhysicsConductive MaterialsElectrical ConductivityElectrical Properties Of CeramicsIon-conducting MaterialsIonic ConductivityIonic ConductorsAlumina CharacterizationFast Ion ConductionFast Ion ConductorsIonic Conducting CeramicsSodium-ion ConductivityTemperature Dependence Of Ionic Conductivity
Abstract The electric conductivities of the two fast ionic conductors RbAg 4 I 5 and Na‐β″‐alumina have been determined at various temperatures and frequencies from 4 MHz to 105 GHz. – The conductivity of RbAg 4 I 5 is found to display a dispersion as expected by the so‐called “universal dynamic” response, a high‐frequency plateau in the range of 100 GHz and an Arrhenius behaviour at both low and high frequencies. – The spectra of Na‐β″‐alumima show a different behaviour. In addition to the “universal dynamic” response dispersion, a faster and thermally less activated relaxation process is observed at high frequencies and low temperatures. Up to 60 GHz, a high‐frequency plateau has not been encountered.
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Crystal Structure of the Solid Electrolyte, RbAg <sub>4</sub> I <sub>5</sub>