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Thermal conductivity of solid parahydrogen with methane admixtures
- Source :
- Scopus-Elsevier
- Publication Year :
- 2003
- Publisher :
- AIP Publishing, 2003.
-
Abstract
- The thermal conductivity of solid parahydrogen crystal with methane admixtures has been measured in the temperature range 1.5 to 8 K. Solid samples were grown from the gas mixture at 13 K. Concentration of CH4 admixture molecules in the gas varied form 5 to 570 ppm. A very broad maximum of thermal conductivity with absolute value of about 110 W/(m K) is observed at 2.6 K. The data are interpreted by Callaway model considering phonons resonant scattering on quasi-local vibrations of CH4 molecules, phonon-grain boundary and phonon-phonon scattering processes. The increase of grain boundary scattering leads to the decrease of the maximum broadening. The analysis shows that the solid mixture of p-H2 and CH4 is a heterogeneous solution for CH4 concentration higher than 0.1 ppm.<br />9 pages. to be published in LTP (2003)
- Subjects :
- 3-й Международный семинар по физике низких температур в условиях микрогравитации
Condensed Matter - Materials Science
Materials science
Physics and Astronomy (miscellaneous)
Scattering
Phonon
Analytical chemistry
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
General Physics and Astronomy
Absolute value
Atmospheric temperature range
Spin isomers of hydrogen
Methane
Crystal
chemistry.chemical_compound
Thermal conductivity
chemistry
Subjects
Details
- ISSN :
- 10906517 and 1063777X
- Volume :
- 29
- Database :
- OpenAIRE
- Journal :
- Low Temperature Physics
- Accession number :
- edsair.doi.dedup.....0a120282def2e807b1f2c53d15247f09