Effect of sintering atmospheres on the microstructure and dielectric properties of Yb/Mg co-doped BaTiO3 ceramics

The effect of Yb/Mg co-doping on the microstructure and electrical properties of BaTiO3 ceramics sintered under oxidizing, reducing and annealed conditions was investigated. XRD analyses indicated the suppression of the solubilities of the acceptor ions in BaTiO3 under the reducing and annealed conditions. DSC measurements indicated that addition of too much Yb would cause the collapse of the core-shell structure in the BaTiO3 ceramics. The effect of sintering atmospheres on the microstructure and dielectric properties was attributed to the change of the solubilities of the acceptor ions in this core-shell-structured material. (c) 2005 Elsevier B.V. All rights reserved.