Negative Thermal Expansion of Yb2Mo3O12 and Lu2Mo3O12

摘要：

　　Compounds Yb2Mo3O12 and Lu2Mo3O12 were prepared by conventional solid-state reaction.Their crystal structures and thermal expansion properties were investigated.It was found that Yb2Mo3O12 and Lu2Mo3O12 adopt orthorhombic structure and show negative thermal expansion (NTE) in the temperature range of 200-800 ℃.Their a-axis and c-axis exhibit stronger contraction in the temperature range of 200-800 ℃,while b-axis slightly expands in the temperature range of 200-300 ℃ and then contracts in the temperature range of 300-800 ℃.The linear thermal expansion coefficients α1 of Yb2Mo3O12 and Lu2Mo3O12 are-5.17 × 10-6 ℃-1 and-5.67 × 10-6 ℃-1,respectively.

关键词： X-ray diffraction Rietveld method Thermal expansion Crystal structure

作者: X.L.Xiao M.M.Wu J.Peng Y.Z.Cheng Z.B.Hu

作者单位: College of Chemistry and Chemical Engineering,Graduate University of Chinese Academy of Sciences,Beijing 100049,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1662-1664

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）