Low Thermal Conductivity Oxides

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.

Department(s)

Physics

Keywords and Phrases

ceramics; Coating application; Low thermal conductivity; Material density; Oxide crystals; Recent progress; structural; Structural anisotropy; Systematic exploration; Atoms; Structural ceramics; Thermal barrier coatings

International Standard Serial Number (ISSN)

0883-7694

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 Materials Research Society (MRS), All rights reserved.

Publication Date

01 Oct 2012

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