In及In-1%Cu熔体团簇的“热收缩”现象  

Thermal Contraction Phenomenon of Cluster Structure of In and In-1%Cu Melt

作　　者：程素娟[1] 王忠华 王海梅[3] 

机构地区：[1]山东理工大学,山东淄博255091 [2]山东大成农药股份有限公司,山东淄博255000 [3]青岛科技大学,山东青岛266042

出　　处：《山东工程学院学报》2002年第3期6-10,共5页Journal of Shandong Institute of Technology

基　　金：国家自然科学基金资助项目 (No 5 0 0 710 2 8);山东省自然科学基金会资助项目 (No Z2 0 0 1F0 2 )

摘　　要：利用液态金属X射线衍射仪对纯In熔体及In 1 %Cu熔体分别在 2 80℃、390℃、5 5 0℃、65 0℃、75 0℃进行了实验研究 ,获得了二者的衍射强度、结构因子、双体分布函数、径向分布函数以及平均最近邻原子间距、原子配位数 .结果表明 ,随温度由 2 80℃升高到 75 0℃ ,两种熔体的平均最近邻原子间距r1 和原子配位数Ns都呈现出减小的趋势 ,原子团簇都出现“热收缩”现象 ,加 1 %Cu后的熔体团簇热收缩程度较之纯In熔体大 .在整个测试温度区间内两种熔体的热收缩都不是均匀的 ,而是在某个温度区间发生突变 ,收缩明显 ,纯In熔体的突变区间为390℃～ 5 5 0℃ ,In 1 %Cu熔体的突变区间为 2 80℃～ 390℃ ,加 1The structure of In and In 1%Cu melt was studied at 280, 390, 550, 650, 750℃ respectively, by using an elevated temperature X ray diffractometer. The diffraction intensity, the structure factor, the pair distribution function, the radial distribution function, the nearest interatomic distance and the coordination number were obtained. The experimental results show that the nearest interatomic distance r 1 and the coordination number Ns of two melts decrease with increasing temperature from 280℃ to 750℃, and thermal contraction phenomenon of atom cluster occurs. Thermal contraction of cluster of In 1%Cu melt is bigger than that of In melt. Thermal contraction of two melts cluster is not homogeneous in whole measured temperature range, but the sudden transformation and the biggest contraction occurs in some temperature range. It has been found that this range of In melt is 390～550℃ and that of In 1%Cu is 280～390℃, the sudden transformation range shifts to low temperature because of Cu addition.

关 键 词：In 熔体 团簇结构 热收缩 X射线衍射 铟 

分 类 号：TG146.431[一般工业技术—材料科学与工程]