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Low thermal conductivity oxides

Published online by Cambridge University Press:  09 October 2012

Wei Pan ,
Simon R. Phillpot ,
Chunlei Wan ,
Aleksandr Chernatynskiy  and
Zhixue Qu
Wei Pan
Affiliation:
State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing, China; [email protected]
Simon R. Phillpot
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL; [email protected]
Chunlei Wan
Affiliation:
Graduate School of Engineering, Nagoya University, Nagoya, Japan; [email protected]
Aleksandr Chernatynskiy
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, FL; [email protected]
Zhixue Qu
Affiliation:
College of Materials Science and Engineering, Beijing University of Technology, Beijing, China; [email protected]
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Abstract

Oxides hold great promise as new and improved materials for thermal-barrier coating applications. The rich variety of structures and compositions of the materials in this class, and the ease with which they can be doped, allow the exploration of various mechanisms for lowering thermal conductivity. In this article, we review recent progress in identifying specific oxides with low thermal conductivity from both theoretical and experimental perspectives. We explore the mechanisms of lowering thermal conductivity, such as introducing structural/chemical disorder, increasing material density, increasing the number of atoms in the primitive cell, and exploiting the structural anisotropy. We conclude that further systematic exploration of oxide crystal structures and chemistries are likely to result in even further improved thermal-barrier coatings.

Keywords

Thermal conductivityceramicsstructural
Type
Research Article
Information
MRS Bulletin , Volume 37 , Issue 10: Thermal-barrier coatings for more efficient gas-turbine engines , October 2012 , pp. 917 - 922
Copyright
Copyright © Materials Research Society 2012

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