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