Thermal properties of the optically transparent pore-free nanostructured yttria-stabilized zirconia
2009; American Institute of Physics; Volume: 106; Issue: 11 Linguagem: Inglês
10.1063/1.3264613
ISSN1520-8850
AutoresSubhajit Ghosh, Desalegne Teweldebrhan, J. R. Morales, Javier E. Garay, Alexander A. Balandin,
Tópico(s)High-Temperature Coating Behaviors
ResumoThe 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/m K. 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.
Referência(s)