文章信息/Info

Title:

Progress on Abnormal Thermal Expansion Materials

作者:

王聰*; 孫瑩; 王蕾

北京航空航天大學物理學院，凝聚態物理與材料物理研究中心

Author(s):

Wang Cong*;  Sun Ying;  Wang Lei

Center for Condensed Matter and Materials Physics, Department of Physics, Beihang University

關鍵詞:

反常負熱膨脹; 功能材料

DOI:

10.7502/j.issn.1674-3962.2015.07.01

文獻標志碼:

A

摘要:

固體材料通常會隨溫度變化產生膨脹或收縮行為，然而，材料的熱脹冷縮會降低精密部件的結構穩定性和安全可靠性，甚至破壞材料的功能特性。在光學儀器、微電子器件、航空航天等高技術領域，我們迫切需要形狀和尺寸不隨溫度變化的材料，以保證其構件具有高的尺寸穩定性、精密性和長的使用壽命，因此，低（近零）熱膨脹材料的研究日益受到重視。本文概述了反常（負或近零）熱膨脹材料的研究與發展歷程，主要針對目前國內外研究較多的幾類負熱膨脹體系的研究工作做了論述，并探討了該研究領域仍存在的問題以及未來可能的發展方向。

Abstract:

Solid materials usually show expansion or contraction behavior in response to changes in temperature. However, thermal expansion behavior always reduces the stability and safe reliability of precision parts, and even destroys the functional features of the materials. In the field of optical instruments, microelectronic devices, aerospace and others, we desperately need the materials for which the shape and size keep unchanged with temperature, in order to ensure high dimensional stability, precision and long service life. Therefore, the research on the low or near zero thermal expansion materials has attracted more and more attention. This paper outlines the research and development of abnormal (negative or near zero) thermal expansion materials, especially, focusing on several popular classes in this system. We further discussed the existent problems and the direction of future development in this research field.