Phase Transition and Negative Thermal Expansion Property of ZrMnMo3O12

A novel material of ZrMnMo3012 with negative thermal expansion is presented. The phase transition temperature and coemcient of thermal expansion （CTE） are investigated by temperature-dependent x-ray diffraction and Raman spectra. It is shown that ZrMnMo3012 adopts monoclinic structure with space gro...

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Bibliographic Details
Published in:中国物理快报：英文版 2016-04 (4), p.104-107
Main Author: 葛向红 毛彦超 李林 李丽平 袁娜 程永光 郭娟 晁明举 梁二军
Format: Article
Language:English
Subjects:
单斜晶系
变温X射线衍射
拉曼光谱
正交晶系
热膨胀性能
热膨胀系数
相变温度
负热膨胀材料
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Summary:A novel material of ZrMnMo3012 with negative thermal expansion is presented. The phase transition temperature and coemcient of thermal expansion （CTE） are investigated by temperature-dependent x-ray diffraction and Raman spectra. It is shown that ZrMnMo3012 adopts monoclinic structure with space group P21/a （No. 14） from 298 to 358K and transforms to orthorhombic with space group Pnma （No. 62） above 363K. The linear CTE obtained from the results of XRD refinement is -2.80 × 10-6 K-1 from 363 to 873 K. The CTE of the bulk cylinder ceramic measured by a thermal dilatometer is -4.7× 10-6 K-1 from 373 to 773K approximatively.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/4/046503