Author:
K. S. Dubey Department of Physics, College of Science University of Basrah Basrah Iraq

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The lattice thermal conductivities of Mg2Si and Mg2Sn have been analyzed in the entire temperature range 2–1000 K in the frame of the expression for the three-phonon scattering relaxation rate recently proposed by Dubey and Misho, and a very good agreement is found between the calculated and the experimental values of the lattice thermal conductivity in the entire temperature range of the study. The separate contributions due to transverse and longitudinal phonons towards the total lattice thermal conductivity have also been studied by calculating their percentage contributions. The percentage contributions of the three-phonon normal and umklapp process scattering relaxation rates towards the three-phonon scattering relaxation rate have been studied for both Mg2Si and Mg2Sn. The percentage contribution of the three-phonon scattering relaxation rate towards the combined scattering relaxation rate has also been studied for transverse as well as for longitudinal phonons, for four different values of the phonon frequencies. The role of the four-phonon processes is. also included in the present analysis.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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