掺杂Ni元素对AgZnO电接触材料组织与性能的影响  

Effect of Ni Doping on Microstructure and Properties of AgZnO Electrical Contact Materials

作　　者：刘彦峰 黄张庭 赵晴 LIU Yan-feng;HUANG Zhang-ting;ZHAO Qing(School of Chemical Engineering and Modern Materials/Shaanxi Key Laboratory of Tailings Comprehensive Utilization of Resources,Shangluo University/Shaanxi Engineering Research Center for Mineral Resources Clean and Efficient Conversion and New Materials,Shangluo 726000,Shaanxi)

机构地区：[1]商洛学院化学工程与现代材料学院/陕西省尾矿资源综合利用重点实验室/陕西省矿产资源清洁高效转化与新材料工程研究中心,陕西商洛726000

出　　处：《商洛学院学报》2025年第2期44-51,共8页Journal of Shangluo University

基　　金：陕西省重点研发计划项目(2022GY-379);陕西省教育厅重点实验室项目(22JS014);国家级大学生创新创业训练计划项目(202311396011)。

摘　　要：采用溶胶-凝胶法制备了纯ZnO粉体及金属Ni掺杂的ZnO复合粉体,借助超声波和磁力搅拌交替湿混法将Ag粉与ZnO粉体或ZnO(Ni)复合粉体混合均匀,通过复压复烧和粉末冶金技术制备新型AgZnO(Ni)电接触材料。利用同步热分析仪(TG-DSC)分析了锌凝胶的热分解情况和组分,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM、EDS)和X射线光电子能谱仪(XPS)等测试手段对复合粉体和块体材料的物相组成、微观形貌和表面价态组成进行表征,并测试分析了Ag基电接触材料的物理性能和力学性能。结果表明,金属Ni的加入有效改善了ZnO粉在Ag基体中的团聚现象,当掺杂Ni质量分数为0.5%时,获得了粒度均一、分散性较佳的ZnO复合粉体。与纯ZnO粉体制备的AgZnO电接触材料相比,掺杂金属Ni的样品电接触材料的致密度、电导率、维氏硬度、弹性模量分别增加了2.8%,13.5%,28.8%,16.04%。Pure ZnO powder and Ni doped ZnO composite powder were prepared by Sol-Gel method.Ag powder and ZnO/ZnO(Ni)were mixed by ultrasonic/magnetic mixing,and the new AgZnO(Ni)electric contact material was prepared by repressing and resintering powder metallurgy technology.The thermal information and composition of zinc gel were analyzed by synchronous thermal analyzer(TG-DSC).Moreover the phase composition,microscopic morphology and surface valence composition of composite powder and block materials were characterized by XRD,SEM EDS and XPS.The physical and mechanical properties of Ag-based electrical contact materials were also tested and analyzed.The results show that the addition of Ni effectively improved the agglomeration phenomenon of ZnO nano-powder in the Ag matrix.When the Ni doping amount reached 0.5%,the final product demonstrates an uniform and well dispersed state.The results show that the addition of metal Ni can effectively improve the agglomeration of ZnO nanoparticle in Ag matrix,and when the doping mass fraction is 0.5%Ni,the ZnO composite powder with uniform particle size and good dispersion is obtained.The density,conductivity,Vickers hardness and elastic modulus of Ni-doped samples are increased by 2.8%,13.5%,28.8%and 16.04%,respectively,compared with AgZnO electrocontact materials prepared by pure ZnO.

关 键 词：AGZNO 溶胶-凝胶法 掺杂 复压复烧 电接触材料 

分 类 号：TM24[一般工业技术—材料科学与工程]