【作者】 朱达川； 陈家钊； 李宁； 涂铭旌； 张自明； 胡兆敏；

【Author】 ZHU Da-chuan;CHEN Jia-zhao;LI Ning;TU Ming-jing;ZHANG Zi-ming;HU Zhao-min The Department of Metal Material Science and Engineering, Sichuan University Chengdu, 610065, China State-owned Jianzhong Chemical Company, Yibing, 644000, China

【机构】 四川大学金属材料科学与工程系； 国营建中化工总公司；

【摘要】 微量锂略微提高纯铜的电阻率,且电阻率随铜中锂残留量的增加而缓慢增加;锂对纯铜比电阻率的影响介于镁和铝之间。这是由于:虽然锂的除气去杂作用能降低铜的电阻率,但锂的原子半径比铜的原子半径大18%左右,形成有限置换固溶体,导致纯铜晶格畸变,这种由畸变造成的弹性应变区引起电子散射,从而大大增加铜的电阻率,因此从整体上表现为纯铜电阻率的增加。更多还原

【Abstract】 Trace lithium added in melting copper liquid increased copper’s resistance slightly.The resistance increasedgradually with the residual lithium content increasing. The research showed that effect of one lithium atomic percent onthe copper’s resistance is between magnesium and aluminum. Lithium has good effect on copper’s purification such asdesulfurization and deoxidization, thus it can decrease copper’s resistance. However, lithium atom is bigger than copperatom, forrming substitutional solid solution, thus leading to copper’s crystal deformation. This deformation makeelectron diffuse reflection, so copper’s resistance increased greatly.更多还原