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Author Barsoum, M. W. ♦ El-Raghy, T. ♦ Porter, W. D. ♦ Wang, H. ♦ Ho, J. C. ♦ Chakraborty, S.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ AMBIENT TEMPERATURE ♦ CARBIDES ♦ DEBYE TEMPERATURE ♦ DEFECTS ♦ ELECTRONS ♦ FERMI LEVEL ♦ PHYSICS ♦ SPECIFIC HEAT ♦ THERMAL CONDUCTIVITY ♦ THERMODYNAMIC PROPERTIES
Abstract In this article we report on the thermal properties of the ternary carbide Nb{sub 2}SnC. Its heat capacity, c{sub p}, is 75 J/molK at ambient temperatures and increases to {approx}115 J/molK at 1300 K. Analysis of c{sub p} measurements in the 4--15 K temperature range yields a Debye temperature of 324 K and a density of states at the Fermi level of 2.66 (eVunit cell)-1. At room temperature, the thermal conductivity is 17 W/mK and it increases to {approx}31 W/mK at 1500 K. At temperatures greater than 600 K, roughly 85% of the heat is transported by electronic defects (i.e., electrons and/or holes). The thermal properties of Nb{sub 2}SnC are quite comparable to those of near-stoichiometric NbC{sub x}.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2000-12-01
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 88
Issue Number 11


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