Thermal diffusivity and conductivity of Zr1-xYxO2-x/2 (x=0, 0.084 and 0.179) single crystals

• Published in: Journal of the European Ceramic Society Vol. 24; no. 10-11; pp. 3081 - 3089
• Main Authors: MEVREL, Rémy, LAIZET, Jean-Claude, AZZOPARDI, Alban, LECLERCQ, Bérangère, POULAIN, Martine, LAVIGNE, Odile, DEMANGE, Didier
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier 01.09.2004
• Subjects: Condensed matter: structure, mechanical and thermal properties; Diffusion in solids; Exact sciences and technology; Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves; Physics; Thermal diffusivity; Transport properties of condensed matter (nonelectronic); Temperature dependence; Inorganic compounds; Transition element compounds; Phonons; Thermal diffusivity; Experimental study; Yttrium Zirconium Oxides Mixed; Thermal properties; Monocrystals; Yttrium Oxides; Solid solutions; Thermal conductivity; Chemical composition; Zirconium Oxides
• ISSN: 0955-2219; 1873-619X

The thermal diffusivity of Zr1-xYxO2-x/2 (x=0, 0.086 and 0. 0.179) single crystals has been determined up to 1100NBDGC with a laser flash method designed to minimize radiative transfer effects. The thermal conductivity of these materials can be satisfactorily described in the framework of the phonon theory, provided a minimum phonon mean free path is introduced. Both experimental results and a theoretical approach indicate that for this system, and in the composition range explored, the high temperature limit of the thermal conductivity does not depend on the constitutional point defect content. The point defects influence the decrease of the thermal conductivity at intermediate temperatures.