Thermal conductivity of BaZrO 3 and KTaO 3 single crystals
BaZrO 3 and KTaO 3 are two rare examples of perovskite oxides that retain the ideal cubic structure down to the lowest temperature. In this paper, we report thermal conductivity ( κ ) between 300 and 773 K on single crystals of these compounds. For BaZrO 3 , the κ of 7.5 Wm −1 K −1 at 300 K is ∼40%...
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| Published in: | Applied physics express Vol. 17; no. 7; p. 71003 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
01-07-2024
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| Online Access: | Get full text |
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| Summary: | BaZrO 3 and KTaO 3 are two rare examples of perovskite oxides that retain the ideal cubic structure down to the lowest temperature. In this paper, we report thermal conductivity ( κ ) between 300 and 773 K on single crystals of these compounds. For BaZrO 3 , the κ of 7.5 Wm −1 K −1 at 300 K is ∼40% larger than the previously reported polycrystalline values. For KTaO 3 , our value of 13.1 Wm −1 K −1 at 300 K clarifies the sources of error in some of the previously reported data. These results underscore the importance of high-quality experimental data in benchmarking the accuracy of advanced first-principles κ calculations. |
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| ISSN: | 1882-0778 1882-0786 |
| DOI: | 10.35848/1882-0786/ad5c26 |