Corrosion Behavior of SnO2-based Electrode Ceramics in Soda-lime Glass Liquid

Dense SnO(2)-based electrode ceramics have extensive application prospect in glass electric-melting industry due to the excellent electrically-conductive and chemical property in high temperatures and oxidation environment. In this paper, dense SnO(2)-based electrode ceramics doped with MnO(2) and Sb(2)O(3) were prepared by pressureless sintering method and the corrosion rate in soda-lime glass liquid as well as the microstructure evolution was mainly investigated. The results suggested that SnO(2)-based ceramics had good corrosion resistance, and the minimum value was only2.54x10(-4) mm/ h when MnO(2) content is 1.0% and Sb(2)O(3) content is 0.1%. Composition Elements of Glass liquid were detected in the grain boundary and some intergranular pores. It was found that SnO(2) grains remained unchanged, whereas MnO(2) was easily dissolved into molten glass liquid. SnO(2)-based electrode ceramics with dense structure and few amounts of additives had excellent corrosion resistance to the molten glass.