Dielectric properties of Ba(Ti,Ce)O-3 from 10(2) to 10(5) Hz in the temperature range 85-700 K

Ba(Ti1-xCex)O-3 ceramics with x = 0.1, 0.2, 0.3, 0.33, 0.4 and 0.5 have been synthesized by the mixed oxide method. Dielectric measurements were performed for Ba(Ti1-xCex)O-3 ceramics from 10(2) to 10(5) Hz in the temperature range 85-700 K. The dielectric measurements confirmed that the solid solution range extends up to about x = 0.3. In the solid solutions, the temperature of the permittivity maximum was shifted at a rate of -7 K/mol% Ce atom and the permittivity maximum decreased with increasing Ce content. The temperature and frequency dependence of the permittivity was fitted by the Curie-Weiss law beyond the transition temperature and characterized by parameters that are used to describe relaxer behaviour.