Phase transition and negative thermal expansion properties of Sc2-xCrxMo3O12

被引：22

作者：

Wu, M. M. ^{[1
]}

Peng, J. ^{[2
]}

Han, S. B. ^{[1
]}

Hu, Z. B. ^{[3
]}

Liu, Y. T. ^{[1
]}

Chen, D. F. ^{[1
]}

机构：

[1] China Inst Atom Energy, Beijing 102413, Peoples R China

[2] Chinese Acad Sci, Expt Phys Ctr, Inst High Energy Phys, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Coll Mat & Photoelect Technol, Grad Univ, Beijing 100049, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2012年 / 38卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Thermal expansion; Molybdates; X-ray diffraction; SOLID-SOLUTIONS; MOLYBDATES; TUNGSTATE; Y2MO3O12;

D O I：

10.1016/j.ceramint.2012.05.033

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The crystal structure, phase transition and thermal expansion behaviors of solid solutions Sc2-xCrxMo3O12 (0 <= x <= 2) were investigated using X-ray diffraction (XRD) and differential scanning calorimetry (DSC). At room temperature, samples with x <= 0.7 and x >= 0.8 crystallize in orthorhombic and monoclinic structures, respectively. DSC result indicates that the phase transition of Sc0.5Cr1.5Mo3O12 from monoclinic to orthorhombic structure occurs at 203.66 degrees C. The linear thermal expansion coefficient of orthorhombic phases varies from -2.334 x 10(-6) degrees C-1 to 0.993 x 10(-6) degrees C-1 when x increases from 0.0 to 1.5. The near-zero linear thermal expansion coefficients of -0.512 x 10(-6) degrees C-1 and 0.466 x 10(-6) degrees C-1 are observed for compounds with x = 0.5 and 0.7, respectively. (c) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：6525 / 6529

页数：5

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