SIMULATION OF THE OXYGEN AND CARBON MONOXIDE PROFILES IN SNO2 BASED THICK FILMS

MIRIAM S. CASTRO, CELSO M. ALDAO, MIGUEL PONCE.

Florianopolis, Brasil

Congreso; Encontro da SBPMat; 2006

H506 - SIMULATION OF THE OXYGEN AND CARBON MONOXIDE PROFILES IN SNO2-BASED THICK FILMS Miriam S. Castro (INTEMA (CONICET-UNMdP)), Celso M. Aldao (INTEMA (CONICET-UNMdP)) and Miguel A. Ponce (INTEMA (CONICETUNMdP)) The dependence of the electrical conductivity of SnO2 thick films under carbon monoxide was studied. Assuming carbon monoxide diffusion through the film and the consequent reaction with the previously adsorbed oxygen, carbon and oxygen transient profiles were calculated from the continuity equation for each component. A simple model considering CO diffusion through the SnO2 thick film and the possible reaction with previous adsorbed oxygen reproduces resistance variation with exposition time.