掺杂导电增强相对铝电极性能的影响  

Effect of Doping Conduction Enhancement on the Performance of Aluminum Electrode

作　　者：汪冲 朱晓云[1,2] 龙晋明 WANG Chong;ZHU Xiaoyun;LONG Jinming(School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Kunming Guixinkai Technology Co.,Ltd.,Kunming 650039,China)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]昆明贵信凯科技有限公司,昆明650039

出　　处：《材料导报》2021年第8期82-87,共6页Materials Reports

基　　金：昆明理工大学分析测试基金(2018M20172230025)。

摘　　要：掺杂不同含量的石墨烯、碳纳米管、纳米银、银包铝粉作为导电增强相制备铝浆,将其印刷在氧化锌基片上并在680℃烧结得到铝电极,研究不同导电增强相对铝电极的导电性和附着力等性能的影响。采用四探针法测定铝电极方阻,通过二次烧结银电极,使用拉力试验机测定铝电极的附着力。采用扫描电镜(SEM)、X射线衍射仪(XRD)等手段对掺杂导电增强相铝电极的显微组织、形貌及成分等进行表征。结果表明:碳纳米管和石墨烯的掺杂量分别为1%、2%(质量分数,下同)时,铝电极导电性的提高效果较好,当掺杂量分别高于1.5%、3%时,铝电极表面形貌及组织会被破坏,导致铝电极导电能力差、附着力低;掺杂纳米银对铝电极导电性的提高效果最好,掺杂后铝电极表面平滑光整、组织致密均匀、金属光泽度高、附着力好。掺杂6%纳米银制备S3组铝电极,测定其平均方阻为0.22Ω/,该铝电极与氧化锌基体的附着力达到8.9 N/mm^(2)。同时,为了探究铝电极的稳定性,实验测定了掺杂不同导电增强相的铝电极在室温60 d内的电阻变化率。结果表明:各组铝电极电阻在室温环境下变化均较小,掺杂纳米银的铝电极电阻变化率最小,为0.98%;掺杂碳纳米管的铝电极电阻变化率最大,为1.52%。Doped with different contents of graphene,carbon nanotubes,nano silver,silver-coated aluminum powder as the conductive reinforcement phase to prepare aluminum paste,printed it on a zinc oxide substrate and sintered at 680℃to obtain aluminum electrodes,and studied the different conductive enhanced The effect of electrode conductivity and performance.The square resistance of the aluminum electrode was measured by the four-probe method,and the adhesion of the aluminum electrode was measured by a tensile tester using a secondary sintered silver electrode.The metallographic microscope,scanning electron microscope(SEM),X-ray diffractometer(XRD)and other methods were used to characterize the fiber structure,morphology and composition of the aluminum electrode doped with conductive enhanced phase.The results show that the doping content of carbon nanotubes and graphene is better at 1%and 2%,respectively.Higher than 1.5%and 3%will destroy the surface morphology of aluminum electrode,aluminum electrode has poor conductivity and low adhesion.The effect of doped nano-silver is the best,the surface of the aluminum electrode is smooth and smooth,the tissue is dense and uniform,the metal silver,and the average square resistance was determined to be 0.22Ω/□,and the adhesion to the zinc oxide substrate reached 8.9 N/mm^(2).At the same time,in order to determine the stability of the aluminum electrode,the resistance change rate of the aluminum electrode doped with different conductive reinforcing phases was measured experimentally at room temperature for 60 days.The results show that the changes in the ambient temperature of each group of aluminum electrodes are relatively small.The resistance change of the aluminum electrode doped with nano-silver is a minimum of 0.98%;the resistance change of the aluminum electrode doped with carbon nanotubes is a maximum of 1.52%.

关 键 词：掺杂 铝电极 导电增强相 

分 类 号：TM2[一般工业技术—材料科学与工程] TB34[电气工程—电工理论与新技术]