Fabrication and Properties of SrBi2(Ta1-xNbx)2O9 Ferroelectric Ceramics
SrBi2(Ta1-xNbx)2O9(SBTN) ferroelectric ceramics with typical bismuth layered perovskite structure were synthesized with a reactive hot-press sintering process at 1000°C for 2h. The as-sintered SBTN (x=0.2, 0.4, 0.6, 0.8) materials had a maximum relative density of 95.97%. Bi-layered perovskite structure was obtained. The grain sizes increased with increasing Nb content. In 1MHz frequency, remanent polarization (Pr) of SBTN (x=0.2, 0.4, 0.6, 0.8) were 10.0, 3.0, 1.7 and 1.0, while coercive field (Ec) of SBTN (x=0.2, 0.4, 0.6, 0.8) were 50, 32, 33 and 33kV/cm, respectively.
Wei Pan and Jianghong Gong
W. Wang et al., "Fabrication and Properties of SrBi2(Ta1-xNbx)2O9 Ferroelectric Ceramics", Key Engineering Materials, Vols. 336-338, pp. 143-145, 2007