HIGH-PERMITTIVITY DIELECTRIC CERAMICS WITH HIGH ENDURANCE

Donor-doped BaTiO3 ceramics show very high endurance under DC field stress and are therefore suitable candidates for the manufacture of multilayer capacitors with thin dielectric layers. CeO2 additives were found to be excellent donor dopants. The donor effect results from Ce3+ ions incorporated on Ba sites of the perovskite lattice. Defect chemistry, solubility of CeO2 in BaTiO3 and the ferroelectric phase transition of Ce-modified BaTiO3 have been studied by several methods.