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Thermal properties of the optically transparent pore-free nanostructured yttria-stabilized zirconia

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5 Author(s)
Ghosh, S. ; Nano-Device Laboratory, Department of Electrical Engineering, University of California-Riverside, Riverside, California 92521, USA ; Teweldebrhan, D. ; Morales, J.R. ; Garay, J.E.
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The authors report results of investigation of thermal conductivity of nanocrystalline yttria-stabilized zirconia. The optically transparent pore-free bulk samples were prepared via the spark plasma sintering process to ensure homogeneity. Thermal conductivity K was measured by two different techniques. It was found that the pore-free nanostructured bulk zirconia is an excellent thermal insulator with the room-temperature K∼1.7–2.0 W/mK. It was also shown that the “phonon-hopping” model can accurately describe specifics of K dependence on temperature and the grain size. The obtained results are important for optimization of zirconia properties for specific applications in advanced electronics and coatings.

Published in:

Journal of Applied Physics  (Volume:106 ,  Issue: 11 )

Date of Publication:

Dec 2009

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