电极银浆银粉特性对瓷介电容器性能的影响  

Effect of Silver Powder Characteristics of Electrode Silver Paste on the Performance of Ceramic Capacitor

作　　者：谷天鹏 甘国友[1] 余向磊 赵汝云[2] 李文琳[2] 李俊鹏[2] GU Tianpeng;GAN Guoyou;YU Xianglei;ZHAO Ruyun;LI Wenlin;LI Junpeng(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Kunming Institute of Precious Metals,Kunming 650106,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]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《有色金属工程》2019年第10期7-12,共6页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目（51771084）;云南省科技计划项目（2018ZE001;2016DC032）~~

摘　　要：采用不同粒径和比表面积的银粉制备了电容器电极银浆,研究了在高温烧结条件下银粉的物理化学参数对BaTiO4瓷介电容器电容量与电容损耗的影响。利用比表面积测试仪(SSAA),激光粒度仪(LPSA),场发射扫描电子显微镜(FESEM)表征分析了样品比表面积、粒度和形貌,并进行了电容测试。结果表明,在830℃的烧结温度下选用高比表面积(7.7m^2/g)的类球型超细银粉,其制成的银浆在烧结后形成的银膜最致密,且表面最平整,选用此银浆烧结电极的电容器平均电容为9.17nF,电容损耗为0.68%。表明选用更高比表面积银粉的银浆,烧结成的银电极更加致密,电容器的性能更优。The electrode silver paste was prepared by silver powder with different particle size and specific surface area.The effect of physical and chemical parameters of silver powder on the capacitance and capacitance loss of BaTiO4 ceramic capacitor was studied under high temperature sintering conditions.The specific surface area,particle size and morphology of the sample were characterized by specific surface area analyzer(SSAA),laser particle size analyzer(LPSA),and field emission scanning electron microscope(FESEM).The capacitance of the sample was tested.The test results revealed that the spherical ultra-fine silver powder with high specific surface area(7.7 m^2/g)is selected at the sintering temperature of 830°C.The silver paste formed by the silver paste is the densest and the surface is the most flat.The average capacitance of the capacitor using this silver paste as electrode was 9.17 nF,and the capacitance loss was 0.68%.The results show that the silver paste with higher specific surface area silver powder can improve the density of silver electrode,and the performance of the capacitor is better.

关 键 词：瓷介电容器 超细银粉 电容量 电容损耗 比表面积 

分 类 号：TB146.32[一般工业技术]