多层陶瓷电容器端电极用低温烧结铜浆及烧结特性研究

多层陶瓷电容器(MLCC)端电极低温烧结技术仍是目前研究的重点与难点.为了改善MLCC低温烧结铜端电极的烧结形貌与质量,开发出适用于低温烧结的端电极铜浆的新型玻璃粉,探讨了玻璃粉的转变温度、含量、粒径以及玻璃粉与陶瓷基片的烧结润湿性与铜浆烧结特性之间的关系.此外,研究了铜粉形貌、粒径等对端电极烧结特性的影响.结果表明:...

Low temperature sintered copper paste and its sintering characteristics for terminal electrode of multilayer ceramic capacitors

Low-temperature sintered technology is still a great challenge for the terminal electrode of multilayer ceramic capacitor(MLCC).In order to improve the morphology and quality of the low-temperature sintered terminal electrode,a novel glass powder for low-temperature sintered copper paste were developed,and the relationship between the glass powder parameters,such as the transition temperature,content,particle size,sintering wettability with the ceramic substrate,and sintering characteristics were discussed.Besides,the impact of the shape and particle size of the copper powder on the sintering characteristics of the terminal electrode were investigated.The results show that an excellent sintered terminal electrode with the density up to 99.87%can be obtained with suitable glass powder(the transition temperature is 577.6℃,the content is 10%,D₅₀=2.0μm)and the ratio of copper powder Cu-2 to Cu-4 is 6∶4(D₅₀=1.4μm).