多晶粉末样品热膨胀的X射线衍射测量  

Thermal Expansion of Multi-crystal Powder Measured by X-ray Diffractometer

作　　者：赵淼[1] 周严[1] 傅斌[1] 郝延明[1] 

机构地区：[1]天津师范大学物理与电子信息学院,天津300074

出　　处：《天津师范大学学报（自然科学版）》2005年第4期37-39,共3页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50271022);天津师范大学博士基金资助项目(52R010)

摘　　要：利用X射线衍射方法精确测量了2∶17型稀土化合物N d2A lFe15M n的晶胞参数及热膨胀系数并研究了其结构特征.结果表明,室温下,N d2A lFe15M n化合物具有单相的Th2Zn17型菱方结构(空间群为R 3m).对该化合物晶格常数的测量误差可以达到1-0 4,基本上可满足对一般位移型相变测量要求的精度.The lattice constants and the thermal expansion coefficient of 2： 17 type rare earth-transition metal compound Nd2AlFe15Mn were obtained by means of X-ray diffraction. The results showed that Nd2AlFe15Mn compound has a rhombohedral Th2Zn17-type structure in room temperature. The errors of lattice constant in this compound were able to achieve 10^-4, which basically met the measuring precision in displacive phase transition.

关 键 词：X射线衍射 热膨胀 晶胞参数 

分 类 号：TG115.222.1[金属学及工艺—物理冶金]