Zhu Dachuan1,Song Zhimin2,Chen Jiazhao1,Tu Mingjing1,Pan Haibing3
(1.Institution of Material Science and Engineering,Sichuan University,Chengdu 610065, China;2.Measurement and Analysis Center,Sichuan University,Chengdu 610065,China;3. National Synchronous Radiation Laboratory,University of Science and Technology of China,Hefei 230000,China)
Abstract:The surface electron binding energy of CuLi alloys was detected by X-ray photoelectron spectroscopy.The distribution of electrons near Feimi face was analyzed by synchronous radiation instrument.The result shows that the addition of trace lithium to copper affects the valence electron of copper and decreases the electron density of Feimi face,such that the electric conductivity of copper decreases.But lithium can purify the oxygen,sulfur and other impurities,the electric conductivity decreased gradually with lithium content increasing.This is because lithium dissolving in copper lattice leads to the deformation of copper lattice,meanwhile increases the binding energy of surface electrons,and thus decreases the electric conductivity.
Keywords:Cu-Li-alloy; electric conductivity;valence electron;electron distribution