Thermal properties of Nb2SnC

Citation
Mw. Barsoum et al., Thermal properties of Nb2SnC, J APPL PHYS, 88(11), 2000, pp. 6313-6316
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
88
Issue
11
Year of publication
2000
Pages
6313 - 6316
Database
ISI
SICI code
0021-8979(200012)88:11<6313:TPON>2.0.ZU;2-M
Abstract
In this article we report on the thermal properties of the ternary carbide Nb2SnC. Its heat capacity, c(p), is 75 J/mol K at ambient temperatures and increases to approximate to 115 J/mol K at 1300 K. Analysis of c(p) measure ments in the 4-15 K temperature range yields a Debye temperature of 324 K a nd a density of states at the Fermi level of 2.66 (eV unit cell)(-1). At ro om temperature, the thermal conductivity is 17 W/m K and it increases to ap proximate to 31 W/m K at 1500 K. At temperatures greater than 600 K, roughl y 85% of the heat is transported by electronic defects (i.e., electrons and /or holes). The thermal properties-of Nb2SnC are quite comparable to those of near-stoichiometric NbCx. (C) 2000 American Institute of Physics. [S0021 -8979(00)02822-X].