Sintering and Dielectric Properties of Excess Bi2O3 Doped BaBi2Nb2O9 Ceramics
In this study, ferroelectric materials with Bi-layered structure BaBi2Nb2O9 with excess x wt% Bi2O3 (x=0, 1.5, and 3) are investigated as the main compositions, and the sintering is proceeded from 1000oC~1100oC. The effect of Bi2O3 on the morphologies, crystal structure, and dielectric characteristics of BaBi2Nb2O9 ceramics is developed with the aid of SEM, X-ray diffraction, and dielectric-temperature curves. Dielectric properties are investigated in the temperature of 25oC~ 465oC at frequency 10KHz~1MHz. It is found that sintering temperature and Bi2O3 content has no apparent influence on the Curie temperatures, but they have large influence on the maximum dielectric constants.
Wei Pan and Jianghong Gong
H. H. Chung et al., "Sintering and Dielectric Properties of Excess Bi2O3 Doped BaBi2Nb2O9 Ceramics", Key Engineering Materials, Vols. 336-338, pp. 188-191, 2007