Hostname: page-component-5c6d5d7d68-txr5j Total loading time: 0 Render date: 2024-08-18T04:21:52.007Z Has data issue: false hasContentIssue false
  • English
  • Français

A Theoretical Approach to the Thermal Conductivity of Boron Carbides

Published online by Cambridge University Press:  25 February 2011

V. M. Kenkre  and
X. Fan
V. M. Kenkre
Affiliation:
Department of Physics and AstronomyUniversity of New Mexico, Albuquerque, NM 87131
X. Fan
Affiliation:
Department of Physics and AstronomyUniversity of New Mexico, Albuquerque, NM 87131
Get access

Abstract

The thermal conductivity of boron carbides at high temperatures presents a fundamental challenge to theory. One of the striking features is that, while in B4C it displays “normal” behaviour in that it decreases with increasing temperature, in B9C it is nearly temperature-independent. We address this feature through a model calculation which assumes the heat current to be due to carrier phonons whose frequency is modulated by lower-frequency phonons which “dress” the carrier phonons through strong interaction. Preliminary calculations show satisfactory but partial agreement with experiment for reasonable parameters and delineate areas for further investigation of the vibrational properties of boron carbides.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 97: Symposium I – Novel Refractory Semiconductors , 1987 , 89
Copyright
Copyright © Materials Research Society 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Wood, C., Emin, D. and Gray, P.E.,Phys. Rev. B 31, 6811(1985).Google Scholar
2. Holstein, T., Ann. of Physics 8, 325, 343 (1959); see also D. Emin, Physics Today, 35, 34 (1982).Google Scholar
3. Silbey, R. and Munn, R. W., J. Chem. Phys. 72, 2763 (1980).Google Scholar
4. Andersen, J. D., Duke, C. B. and Kenkre, V. M., Chem. Phys. Lett. 110 504 (1984).Google Scholar
5. Hardy, R. H., Phys. Rev. 132, 168 (1963).Google Scholar
6. Visscher, W. M., Phys. Rev. A 10, 2461 (1974).Google Scholar
7. Kenkre, V.M., Springer Tracts in Mod. Phys., vol.94 (1983), p. 1.Google Scholar
8. Emin, D., private communication.Google Scholar