期刊文献+

Zero and controllable thermal expansion in HfMgMo(3-x)WxO(12)

Zero and controllable thermal expansion in HfMgMo(3-x)WxO(12)
分享 导出
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 Hf Mg Mo3-xWx O12 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. HfMgMo(3-x)WxO(12) 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 Hf Mg Mo3-xWx O12 crystallize in an orthorhombic structure for x≤2.0 and a monoclinic structure for x2.0. A near-zero thermal expansion(ZTE) is realized for HfMgMo(2.5)W(0.5)O(12) 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.
作者 李涛 刘献省 程永光 葛向红 张孟迪 连虹 张莹 梁二军 李玉晓 Tao Li,Xian-Sheng Liu,Yong-Guang Cheng,Xiang-Hong Ge,Meng-Di Zhang,Hong Lian,Ying Zhang,Er-Jun Liang,Yu-Xiao Li(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)
出处 《中国物理B:英文版》 SCIE EI CAS CSCD 2017年第1期348-352,共5页 Chinese Physics
基金 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) the Fund for Science & Technology Innovation Team of Zhengzhou,China(Grant No.112PCXTD337)
关键词 热膨胀系数 可控 单斜结构 X射线衍射 斜方晶系 溶液结晶 电性差异 拉曼光谱 zero thermal expansion negative thermal expansion orthorhombic structure solid solution Raman spectroscopy
作者简介 Corresponding author. E-mail: ejliang@zzu.edu.cn Corresponding author. E-mail: liyuxiao@zzu.edu.cn
  • 相关文献
投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈