Ag-10Pd结构及陶瓷中的电解质对银迁移的影响  

Effect of Ag-10Pd structures and electrolytes in ceramics on silver migration

作　　者：熊庆丰[1] 李文琳[1] 吕刚[1] 陈立桥 XIONG Qingfeng;LI Wenlin;LYU Gang;CHEN Liqiao(State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Institute of Kunming Precious Metal,Kunming 650106,China;Innovation & Application Institute,Zhejiang Ocean University,Zhoushan 316022,Zhejiang Province,China)

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,云南昆明650106 [2]浙江海洋大学创新应用研究院,浙江舟山316022

出　　处：《电子元件与材料》2019年第8期43-47,共5页Electronic Components And Materials

基　　金：国家自然科学基金(51261008)

摘　　要：研究了以Ag-10Pd混合粉、合金粉和核壳结构粉末分别作为导电相的电极在Al2O3陶瓷电路中的银迁移情况,也考察了Al2O3陶瓷受不同电解质浸泡对银迁移的影响.结果表明,采用合金化的银钯电极具有最佳的抗银迁移能力,其次是核壳结构的银钯结构电极.银在迁移过程中,负电极首先形成絮状析出物,从负极向正极形成树枝状析出物并逐渐长大成为粗枝和片状.电解质浸泡陶瓷对电极银迁移速度有显著影响,即使经0.01 mmol/L极低浓度的电解质浸泡后,银的迁移速度也会成倍增加.本文为高可靠性电路制造提供重要的电极材料优化方案和电路失效分析的依据.The silver migration in Al2 O3 ceramics was studied by comparing the mixed,alloyed and core-shell Ag-10Pd powders as the conductive electrode.The effect of different electrolyte immersed Al2 O3 on the silver migration was investigated by experiments.The results show that the alloyed Ag-10Pd is the best structure to resist the silver migration,and the core-shell structure is the second best.During the silver migration,flocculent precipitates form on the negative electrode at the beginning,and then dendritic precipitates gradually grow into thick and flaky structure.The silver migration rate could increase by twice even at a low concentration of 0.01 mmol/L electrolytes,which indicates the electrolytes in Al2O3 ceramics could largely affect silver migration.This paper provides basis for electrode material optimization and circuit failure analysis for high reliability circuit manufacturing.

关 键 词：银钯 复合结构 电极 银迁移 导电相 电解质 

分 类 号：TN304[电子电信—物理电子学]