Effects of additives on the AgSnO2 contacts erosion behavior

Abstract

The switching performances of several improved silver tin-oxide materials with several kinds of additives, including WO/sub 3/,Bi/sub 2/O/sub 3/,In/sub 2/O/sub 3/, were conducted in an accelerated testing machine. Based on the experimental results and the observations of the contacts surface microstructure, the effects of additives on the silver tin-oxide contacts erosion behavior are studied. It is indicated that the effects of additives on the wettability between liquid silver metal and the contact surface, the distribution and the thermal stability of additives are critical in the determination of erosion characteristics and the morphological features of the contact surface. The erosion behaviors of silver-tin oxide materials with different additives are compared, and the doping effect on surface morphology is presented.