不同形貌镀银铜粉导电胶的制备及表征  

Preparation and characterization of electrically conductive adhesives of silver-coated copper powder with different morphologies

作　　者：董晓茹 黄楚云[1] 贺华[1] 马新国[1,2] 裴瑞 薄化婷 石伊健 解启海 Dong Xiaoru;Huang Chuyun;He Hua;Ma Xinguo;Pei Rui;Bo Huating;Shi Yijian;Xie Qihai(School of Science,Hubei University of Technology,Wuhan 430068,China;Wuhan Shanyu New Material Technology Co.,Ltd.,Huanggang 438000,China)

机构地区：[1]湖北工业大学理学院,武汉430068 [2]武汉山羽新材料科技有限公司,黄冈438000

出　　处：《电镀与精饰》2023年第6期84-89,共6页Plating & Finishing

基　　金：结构化学国家重点实验室科学基金(20210028);国家自然科学基金重点项目(51472081)。

摘　　要：采用凝胶法制备了高导电率导电胶,其导电填料为基于铜粉的树枝状、片状和球状镀银铜粉。通过四探针测试仪,测量了导电胶的体积电阻率,表征了导电胶的导电性能。采用旋转流变仪和万能拉力机得到导电胶的黏度和剪切强度,分析了导电胶的流变特性和力学性能。结果表明:三种形貌中,由于树枝状粒子的接触点最多且导电通道数量大,使得相同含量下,树枝状镀银铜粉导电胶的导电性能最优。在180℃下添加量为70%的树枝状镀银铜粉导电胶,固化时间2 h,拉拔附着力和黏度为19 MPa和1.08×10^(6) mPa·s,最佳体积电阻率为3.5×10^(-4)Ω·cm。研究结果为制备高性能导电胶提供了可行的方案。The dendritic,flake and spherical silver-coated copper powder based on copper powder was used to prepare the high-conductivity electrically conductive adhesives by gel method.The volume resistivity of the electrically conductive adhesives was measured by a four probe tester,and the conductivity was characterized.The rotational rheometer and universal tensile machine were applied to measure the viscosity and shear strength of the electrically conductive adhesives,and the rheological and mechanical properties were also analyzed.It is found that the dendritic silver-coated copper powder electrically conductive adhesives have the best conductivity among the three morphologies because of the most contact points of dendritic particles and the large number of conductive channels.In addition,at 180℃,the dendritic silver-coated copper powder electrically conductive adhesives with the addition amount of 70%are cured for 2 h,the shear strength and viscosity are 19 MPa and 1.08×10^(6) mPa·s,and the optimal volume resistivity is 3.5×10^(-4)Ω·cm.These results provide a feasible solution for the preparation of high-performance electrically conductive adhesives.

关 键 词：镀银铜粉 导电胶 体积电阻率 

分 类 号：TQ437.3[化学工程]