Thermal properties of Nb2SnC
Thermal properties of Nb2SnC
复制标题
DOI：
10.1063/1.1315326
复制
发表时间：
2000-11
影响因子：
3.2
通讯作者：
M. Barsoum;T. El-Raghy;W. Porter;H. Wang;J. Ho;S. Chakraborty
中科院分区：
文献类型：
--
作者：
M. Barsoum;T. El-Raghy;W. Porter;H. Wang;J. Ho;S. Chakraborty
在这篇文章中，我们报告的三元碳化物Nb 2SnC的热性能。它的热容cp在室温下为75 J/mol K，在1300 K时增加到115 J/mol K。对4-15 K温度范围内的cp测量结果的分析得出德拜温度为324 K，费米能级的态密度为2.66（eV晶胞）−1。在室温下，热导率为17 W/m K，在1500 K时增加到131 W/m K。在高于600 K的温度下，大约85%的热量通过电子缺陷（即，电子和/或空穴）。Nb 2SnC的热性能与近化学计量的NbCx的热性能相当。
In this article we report on the thermal properties of the ternary carbide Nb2SnC. Its heat capacity, cp, is 75 J/mol K at ambient temperatures and increases to ≈115 J/mol K at 1300 K. Analysis of cp 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 (eV unit cell)−1. At room temperature, the thermal conductivity is 17 W/m K and it increases to ≈31 W/m K 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 Nb2SnC are quite comparable to those of near-stoichiometric NbCx.