摘要
通过对Ａｌ和Ｓｎ的液态Ｘ射线衍射数据的分析，发现Ａｌ和Ｓｎ的液体结构随温度的变化都存在突变．Ａｌ的突变发生在１０５０—１２５０℃的温度区间内，Ｓｎ有两个突变点，一个在８００℃左右，另一个在１２００℃附近．随着温度的升高，两种液态金属的平均最近邻原子间离ｒ１都呈现减小的趋势．在短程尺度上Ｓｎ的液体结构类似于αＳｎ的结构．对相关半径ｒｃ的物理意义进行了探讨．
Abstract Based on the analysis of the X ray diffraction data of liquid Al and Sn, temperature induced structural transformations are found for liquid Al in the range of 1050—1250℃ and for liquid Sn near 800 and 1200℃. The nearest neighbor distance r 1 of Al and Sn decreases with the increase of temperature. The structure of liquid Sn is similar to α Sn on the short range order length scale. The physical meaning of the correlation radius r c is discussed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1998年第3期438-444,共7页
Acta Physica Sinica
