中国物理B ›› 2018, Vol. 27 ›› Issue (6): 66501-066501.doi: 10.1088/1674-1056/27/6/066501

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

Phase transition and near-zero thermal expansion of Zr0.5Hf0.5VPO7

Jun-Ping Wang(王俊平), Qing-Dong Chen(陈庆东), Sai-Lei Li(李赛磊), Yan-Jun Ji(纪延俊), Wen-Ying Mu(穆文英), Wei-Wei Feng(冯伟伟), Gao-Jie Zeng(曾高杰), You-Wen Liu(刘友文), Er-Jun Liang(梁二军)   

  1. 1 College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2 College of Aeronautics and Engineering, Binzhou College, Binzhou 256603, China;
    3 Key Laboratory of Materials Physics of Ministry of Education, School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450052, China
  • 收稿日期:2018-03-09 修回日期:2018-03-22 出版日期:2018-06-05 发布日期:2018-06-05
  • 通讯作者: You-Wen Liu, Er-Jun Liang E-mail:ywliu@nuaa.edu.cn;ejliang@zzu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11574276,U173112,and 41401384),the Project of Shandong Provincial Higher Educational Science and Technology Program,China (Grant No.J17KB127),the Science and Technology Development Plans of Binzhou City,China (Grant Nos.2014ZC0307 and 2015ZC0210),and Binzhou University Research Fund Project,China (Grant Nos.BZXYG1513 and BZXYG1706).

Phase transition and near-zero thermal expansion of Zr0.5Hf0.5VPO7

Jun-Ping Wang(王俊平)1,2, Qing-Dong Chen(陈庆东)2, Sai-Lei Li(李赛磊)3, Yan-Jun Ji(纪延俊)1,2, Wen-Ying Mu(穆文英)2, Wei-Wei Feng(冯伟伟)2, Gao-Jie Zeng(曾高杰)3, You-Wen Liu(刘友文)1, Er-Jun Liang(梁二军)3   

  1. 1 College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2 College of Aeronautics and Engineering, Binzhou College, Binzhou 256603, China;
    3 Key Laboratory of Materials Physics of Ministry of Education, School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450052, China
  • Received:2018-03-09 Revised:2018-03-22 Online:2018-06-05 Published:2018-06-05
  • Contact: You-Wen Liu, Er-Jun Liang E-mail:ywliu@nuaa.edu.cn;ejliang@zzu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos.11574276,U173112,and 41401384),the Project of Shandong Provincial Higher Educational Science and Technology Program,China (Grant No.J17KB127),the Science and Technology Development Plans of Binzhou City,China (Grant Nos.2014ZC0307 and 2015ZC0210),and Binzhou University Research Fund Project,China (Grant Nos.BZXYG1513 and BZXYG1706).

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摘要： The Zr0.5Hf0.5VPO7 is successfully synthesized by the solid-state method with near-zero thermal expansion. Powder x-ray diffraction (XRD), Raman spectroscopy, thermal dilatometry, and scanning electron microscopy (SEM) are used to investigate the structure, the phase transition, and the coefficient of thermal expansion (CTE) of Zr0.5Hf0.5VPO7. The investigation results show that the samples are of the single cubic type with a space group of Pa3 at room temperature (RT). It can be inferred that the superstructure is transformed from the 3×3×3 superstructure to the 1×1×1 ideal crystal in a temperature range between 310 K and 323 K. The CTE is measured by a dilatometer to be 0.59×10-6 K-1 (310 K-673 K). The values of intrinsic (XRD) and extrinsic (dilatometric) thermal expansion are both near zero. The results show that Zr0.5Hf0.5VPO7 has near-zero thermal expansion behavior over a wide temperature range.

关键词: near-zero thermal expansion, phase transition, x-ray diffraction (XRD), Raman spectrum

Abstract: The Zr0.5Hf0.5VPO7 is successfully synthesized by the solid-state method with near-zero thermal expansion. Powder x-ray diffraction (XRD), Raman spectroscopy, thermal dilatometry, and scanning electron microscopy (SEM) are used to investigate the structure, the phase transition, and the coefficient of thermal expansion (CTE) of Zr0.5Hf0.5VPO7. The investigation results show that the samples are of the single cubic type with a space group of Pa3 at room temperature (RT). It can be inferred that the superstructure is transformed from the 3×3×3 superstructure to the 1×1×1 ideal crystal in a temperature range between 310 K and 323 K. The CTE is measured by a dilatometer to be 0.59×10-6 K-1 (310 K-673 K). The values of intrinsic (XRD) and extrinsic (dilatometric) thermal expansion are both near zero. The results show that Zr0.5Hf0.5VPO7 has near-zero thermal expansion behavior over a wide temperature range.

Key words: near-zero thermal expansion, phase transition, x-ray diffraction (XRD), Raman spectrum

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)