Liu Zi-Kui, Shang Shun-Li, Wang Yi
Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
Materials (Basel). 2017 Apr 14;10(4):410. doi: 10.3390/ma10040410.
Thermal expansion is an important property of substances. Its theoretical prediction has been challenging, particularly in cases the volume decreases with temperature, i.e., thermal contraction or negative thermal expansion at high temperatures. In this paper, a new theory recently developed by the authors has been reviewed and further examined in the framework of fundamental thermodynamics and statistical mechanics. Its applications to cerium with colossal thermal expansion and Fe₃Pt with thermal contraction in certain temperature ranges are discussed. It is anticipated that this theory is not limited to volume only and can be used to predict a wide range of properties at finite temperatures.
热膨胀是物质的一种重要性质。其理论预测一直具有挑战性，特别是在体积随温度降低的情况下，即在高温下的热收缩或负热膨胀。本文回顾了作者最近发展的一种新理论，并在基本热力学和统计力学框架内进行了进一步研究。讨论了该理论在具有巨大热膨胀的铈以及在特定温度范围内具有热收缩的Fe₃Pt中的应用。预计该理论不仅限于体积，还可用于预测有限温度下的广泛性质。
