Study on the Acid Resistance of Silver Paste

Lead-free glass frits of Bi2O3-B2O3-SiO2 materials were developed by high temperature melting and water quenching methods,and the silver conductive paste was prepared by using above glass frits.The effect of the softening point(Tg) and content of glass frits on the acid resistance of silver paste were discussed.The results showed that,the Tg are very important parameter to the acid resistance of silver films.The acid resistance properties of silver films were improved by adding suitable amount of Al2O3 and TiO2.The micro crystallized glass frits were made by adjusting the ratio of ZnO and Al2O3 to precipitate(ZnAl2O4) crystals.The silver paste,which meet the processing conditions and have a excellent acid resistance characteristics,were prepared by using low Tg lead-free glass.