Isochoric thermal conductivity of solid furan
| Autor: | V. A. Konstantinov, A. V. Zvonaryova, O. I. Pursky, V. P. Revyakin, V. V. Sagan |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Phonon scattering Isochoric process General Physics and Astronomy Thermodynamics Atmospheric temperature range Thermal conduction symbols.namesake 9th International Conference on Cryocrystals and Quantum Crystals Thermal conductivity Heat transfer symbols Isobaric process Debye model |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1090-6517 1063-777X |
| DOI: | 10.1063/1.4807042 |
| Popis: | Thermal conductivity of solid furan has been measured at isochoric conditions in the high-temperature orien-tationally-disordered phase I for samples of different densities. Our isochoric data show a gradual increase of ΛV with temperature whereas isobaric thermal conductivity goes down in this temperature range. The above effect is most clearly expressed in furan, where the atoms in the ring plane are not equivalent, as compared with earlier studied C₆H₆ and C₆H₁₂. The increase of ΛV with temperature can be attributed to weakening of the translation-al-orientational interaction which, in turn, leads to a decrease of phonon scattering on rotational excitations. The experimental data are described in terms of a modified Debye model of thermal conductivity with allowance for heat transfer by both low-frequency phonons and ―diffuse‖ modes. |
| Databáze: | OpenAIRE |
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