Zero and controllable thermal expansion in HfMgMo3-xWxO12

被引：6

作者：

Li, Tao ^{[1
,2
]}

Liu, Xian-Sheng ^{[3
,4
]}

Cheng, Yong-Guang ^{[1
,2
]}

Ge, Xiang-Hong ^{[1
,2
]}

Zhang, Meng-Di ^{[1
,2
]}

Lian, Hong ^{[1
,2
]}

Zhang, Ying ^{[1
,2
]}

Liang, Er-Jun ^{[1
,2
]}

Li, Yu-Xiao ^{[1
,2
]}

机构：

[1] Zhengzhou Univ, Minist Educ, Sch Phys Sci & Engn, Zhengzhou 450052, Peoples R China

[2] Zhengzhou Univ, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Peoples R China

[3] Henan Univ, Henan Key Lab Photovolta Mat, Kaifeng 475004, Peoples R China

[4] Henan Univ, Sch Phys & Elect, Kaifeng 475004, Peoples R China

来源：

CHINESE PHYSICS B | 2017年 / 26卷 / 01期

基金：

中国国家自然科学基金;

关键词：

zero thermal expansion; negative thermal expansion; orthorhombic structure; solid solution; Raman spectroscopy; CRYSTAL WATER; PHASE-TRANSITION; BEHAVIOR;

D O I：

10.1088/1674-1056/26/1/016501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

HfMgMo3-xWxO12 with x = 0.5, 1.0, 1.5, 2.0, and 2.5 are developed with a simple solid state method. With increasing the content of W, solid solutions of HfMgMo3-xWxO12 crystallize in an orthorhombic structure for x <= 2.0 and a monoclinic structure for x > 2.0. A near-zero thermal expansion (ZTE) is realized for HfMgMo2.5W0.5O12 and negative coefficients of thermal expansion (NCTE) are achieved for other compositions with different values. The ZTE and variation of NCTE are attributed to the difference in electronegativity between W and Mo and incorporation of a different amount of W, which cause variable distortion of the octahedra and softening of the MoO4 tetrahedra, and hence an enhanced NCTE in the a-and c-axis and reduced CTE in the b-axis as revealed by Raman spectroscopy and x-ray diffraction.

引用

页数：5

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