Electrical behavior analysis of n-type CaCu3Ti4O12 thick films

M. A. PONCE; M. A. RAMIREZ; F. SCHIPANI; E. JOANNI; M. S. CASTRO

Campos do Jordao, SP

Congreso; XII Encontro da SBPMat; 2013

Sociedade Brasileira de Pesquisa en Materiais

In this work n-type CaCu3Ti4O12 (CCTO) thick films obtained by screen printing and heat-treated at 600°C were studied. The role of CuO on the grain surfaces was considered in order to explain the electrical conduction under vacuum, air and CO atmospheres. The electrical response behavior of the thick films was analyzed considering also the oxygen adsorption and diffusion into the grains at temperatures higher than 280°C. Tunnel currents were also calculated taking into account the donor concentration values for films in vacuum atmosphere.