中国物理B ›› 2017, Vol. 26 ›› Issue (1): 16501-016501.doi: 10.1088/1674-1056/26/1/016501

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Zero and controllable thermal expansion in HfMgMo3-xWxO12

Tao Li(李涛), Xian-Sheng Liu(刘献省), Yong-Guang Cheng(程永光), Xiang-Hong Ge(葛向红), Meng-Di Zhang(张孟迪), Hong Lian(连虹), Ying Zhang(张莹), Er-Jun Liang(梁二军), Yu-Xiao Li(李玉晓)   

  1. 1. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education, Zhengzhou University, Zhengzhou 450052, China;
    2. Henan Key Laboratory of Photovoltaic Materials and School of Physics and Electronics, Henan University, Kaifeng 475004, China;
    3. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education, Zhengzhou University, Zhengzhou 450052, China
  • 收稿日期:2016-07-22 修回日期:2016-10-25 出版日期:2017-01-05 发布日期:2017-01-05
  • 通讯作者: Er-Jun Liang, Yu-Xiao Li E-mail:ejliang@zzu.edu.cn;liyuxiao@zzu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 10974183 and 11104252), the Key Natural Science Project of Henan Province, China (Grant No. 142102210073), the Doctoral Fund of the Ministry of Education of China (Grant No. 20114101110003), and the Fund for Science & Technology Innovation Team of Zhengzhou, China (Grant No. 112PCXTD337).

Zero and controllable thermal expansion in HfMgMo3-xWxO12

Tao Li(李涛)1, Xian-Sheng Liu(刘献省)2, Yong-Guang Cheng(程永光)1,3, Xiang-Hong Ge(葛向红)1, Meng-Di Zhang(张孟迪)1, Hong Lian(连虹)1, Ying Zhang(张莹)1, Er-Jun Liang(梁二军)1, Yu-Xiao Li(李玉晓)1   

  1. 1. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education, Zhengzhou University, Zhengzhou 450052, China;
    2. Henan Key Laboratory of Photovoltaic Materials and School of Physics and Electronics, Henan University, Kaifeng 475004, China;
    3. School of Physical Science & Engineering and Key Laboratory of Materials Physics of Ministry of Education, Zhengzhou University, Zhengzhou 450052, China
  • Received:2016-07-22 Revised:2016-10-25 Online:2017-01-05 Published:2017-01-05
  • Contact: Er-Jun Liang, Yu-Xiao Li E-mail:ejliang@zzu.edu.cn;liyuxiao@zzu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 10974183 and 11104252), the Key Natural Science Project of Henan Province, China (Grant No. 142102210073), the Doctoral Fund of the Ministry of Education of China (Grant No. 20114101110003), and the Fund for Science & Technology Innovation Team of Zhengzhou, China (Grant No. 112PCXTD337).

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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.

关键词: zero thermal expansion, negative thermal expansion, orthorhombic structure, solid solution, Raman spectroscopy

Abstract:

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.

Key words: zero thermal expansion, negative thermal expansion, orthorhombic structure, solid solution, Raman spectroscopy

中图分类号:  (Thermal expansion; thermomechanical effects)

  • 65.40.De
81.05.Je (Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)) 61.50.-f (Structure of bulk crystals) 78.30.-j (Infrared and Raman spectra)