无机材料学报

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负热膨胀”氧化物材料ZrW2O8的研究现状

沈容1,2; 王聪1; 王天民1   

  1. 1. 北京航空航天大学理学院材料物理与化学研究中心 北京 100083; 2. 昆明理工大学材料冶金工程学院, 昆明 650093
  • 收稿日期:2001-09-24 修回日期:2001-11-19 出版日期:2002-11-20 网络出版日期:2002-11-20

Progress in Research on Negative Thermal Expansion of ZrW2O8

SHEN Rong1,2; WANG Cong1; WANG Tian-Min1   

  1. 1. Center of Material Physics and Chemistry; School of Science; Beijing University of Aeronautics and Astronautics; Beijing 100083; China; 2. The School of Materials and Metallurgical Engineering; Kunming University of Science and Technology; Kunming 650093; China
  • Received:2001-09-24 Revised:2001-11-19 Published:2002-11-20 Online:2002-11-20

摘要: 在0.5~1050K温度区间,ZrW2O8具有强烈的各向同性“负热膨胀”(NTE)效应,其负热膨胀可由骨架结构中存在低能刚性单元模型(RUMs)来解释.本文综述了近几年来对ZrW2O8负热膨胀特性及其负热膨胀机理的研究,并对其相变及相变机制做了综述.

关键词: 负热膨胀, ZrW2O8, 骨架结构

Abstract: Zirconium tungstate shows a strong negative thermal expansion from 0.3K up to its decomposition temperature of 1050K. This behavior is especially unusual because the thermal contraction is isotropic over its entire existence range. Recent progress on the unusual negative thermal expansion properties and the origin of ZrW2O8 were reviewed. This paper also discussed the phase transition and its mechanism of zirconium tungstate ZrW2O8.

Key words: negative thermal expansion, ZrW2O8, framework structure

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