Zero thermal expansion in Cs2W3O10

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外文摘要：Zero thermal expansion materials are important for the practical applications due to their shape stability as changing temperature.The reported concept of average atomic volume is an available method to hunt new zero thermal expansion materials.Here,according to this concept,a tetragonal tungstate Cs2W3O10 with zero expansion has been found.There is no structure phase transition as increasing temperature from 150 K to 573 K.The coefficient of thermal expansion of axes and volume are αa=0.0074×10-6 K -1,αc=1.63×10-6 K -1,and αV=1.60×10-6 K-1,respectively,in the temperature range of 150～573 K.The temperature-and pressure-dependent Raman spectra reveal that the vibrations of WO6 octahedra libration modes with positive total anharmonicity and W-O-W bending mode with negative Grüneisen parameter are possibly the origin of zero thermal expansion in Cs2W3O10.

外文关键词：

Zero thermal expansionCesium tungstateRaman spectraAverage atomic volumeTemperature-dependent X-ray diffraction

作者：

Juan Guo、Mingyuan Fang、Qingsong Liu、Xiao Ren、Yongqiang Qiao、Mingju Chao、Erjun Liang、Qilong Gao

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作者单位：

School of Physics&Microelectronics,Key Laboratory of Materials Physics of Ministry of Education of China,Zhengzhou University,Zhengzhou 450052,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Henan ProvinceNatural Science Foundation of Henan ProvinceNatural Science Foundation of Henan Province

项目编号：

2207122121905252212300410086222301420040222300420325

出版年：

2024

DOI：

10.1016/j.cclet.2023.108957

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(7)