Thermal expansion coefficient of diamond in a wide temperature range

被引：67

作者：

Jacobson, P. ^{[1
]}

Stoupin, S. ^{[2
]}

机构：

[1] Cornell Univ, Dept Phys, Ithaca, NY 14853 USA

[2] Cornell Univ, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA

来源：

基金：

美国国家科学基金会;

关键词：

Diamond crystal; Thermal expansion; Thermal properties;

D O I：

10.1016/j.diamond.2019.107469

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental data for the linear thermal expansion coefficient of diamond available in the literature were analyzed and carefully selected to produce a representative dataset, which was fit with a multi-frequency Einstein model (R. Reeber, 1975) using a limited number of effective independent oscillators. In the temperature range of 10-300 K, the fits were constrained using the high-accuracy data (S. Stoupin and Yu. Shvyd'ko, 2011). It was found that the multi-frequency model precisely describes the available data from 10 K to approximately 1000 K. Above 1000 K, discrepancies were found, which suggest presence of anharmonic effects in diamond and/or influence of defects. The obtained semi-empirical formulas can be used as convenient continuous approximations for the thermal expansion coefficient in modeling thermoelastic behavior of diamond components subjected to large temperature variations.

引用

页数：5

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