Phase transition and thermal expansion of Ho2W3O12

被引：5

作者：

Cao, Weigang ^{[1
]}

Zhu, He ^{[1
]}

Liu, Zhanning ^{[1
]}

Deng, Jinxia ^{[1
]}

Chen, Jun ^{[1
]}

Xing, Xianran ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China

来源：

INORGANIC CHEMISTRY COMMUNICATIONS | 2016年 / 73卷

基金：

中国国家自然科学基金;

关键词：

Ho2W3O12; Cooling rate; Phase transition; Negative thermal expansion (NTE); PRESSURE-INDUCED AMORPHIZATION; SOLID-SOLUTIONS; CRYSTAL WATER; MOLYBDATES; TUNGSTATE;

D O I：

10.1016/j.inoche.2016.10.022

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The phase formation of Ho2W3O12 is still in debate, and no detailed analysis was carried out until now. In the present study, we synthesized Ho2W3O12 with different treatments to probe the relationship between phase formation and synthesized conditions. It is found that the orthorhombic phase of Ho2W3O12 is stable at high temperature. While the thermodynamic stable phase of low temperature is monoclinic. The temperature of phase transition was determined at 908 degrees C. Moreover, the phase transition is slow, so it is easy to retain the orthorhombic phase at low temperature. Additionally, the stability and the thermal expansion of orthorhombic Ho2W3O12 were also investigated. The orthorhombic phase can be stabilized by 600 degrees C, and shows negative thermal expansion (NTE) along three axes with the overall volume thermal contraction of -2.1 x 10(-5) degrees C-1. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：111 / 114

页数：4

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