Journal of the American Ceramic Society · 2000 · 175 citations · 18 references
Natural SciencesMaterials SciencePhysicsCeramic MaterialsHeat TransferSolid State PhysicsHeat ConductionHeat Transfer In SolidsThermal DiffusivityThermal Properties Of CeramicsThermal Properties Of MaterialsThermodynamics Of CeramicsDebye ModelMean Free PathPhonon Mean Free PathPoint DefectsPoint Defects In CeramicsThermal ConductivityThermal Conductivity MeasurementsThermal Diffusivity Measurement
The thermal diffusivity of yttria–zirconia (Y 2 O 3 –ZrO 2 ) single crystals, with YO 1.5 concentrations in the range of 0–60 mol%, has been determined using a new method that is based on spatially resolved (20 μm) infrared mapping of a modulated thermal field. The decreasing trend of the thermal conductivity ( K ), as a function of the YO 1.5 content (up to 20 mol%), can be described using a model based on a Debye approach that has been modified by introducing a cut‐off length for the phonon mean free path. At higher concentrations, K increases, as a result of a possible ordering of the point defects.
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