Journal of the American Ceramic Society, Vol.84, No.2, 474-476, 2001
Alternative explanation for the origin of the resistivity anomaly in La-doped BaTiO3
Semiconductivity in La-doped BaTiO3 ceramics after high-temperature firing, e.g., 1350 degreesC in air, is attributed to oxygen nonstoichiometry. In more heavily doped compositions, the observed resistivity rise is attributed to surface oxidation of the grains during cooling.