Abstract
Nd/V-doped Bi4Ti3O12 ceramics (Bi3.2Nd0.8Ti3–xVxO12, x = 0.0∼0.15) were synthesized by a solid-state reaction method. The effect of Nd/V doping on the dielectric and ferroelectric properties were investigated. Nd/V doping caused a decrease in the Curie temperature Tc and the strong low-frequency dielectric dispersion of Bi4Ti3O12. Further, the maximum remnant polarization of the Nd/V-doped ceramics reached a value of P r = ∼12.05 μC/cm2 at x = 0.03∼0.05, which was higher than that of Bi4Ti3O12, namely, 5.2 μC/cm2. Appropriate Nd/V codoping at A and B sites led to a decrease in the electrical conductivity and an improvement in the ferroelectric properties of Bi4Ti3O12 ceramics.
Acknowledgments
This work was supported by National Research Foundation of Korea Grant funded by the Korean Government (2009-0072488). Also supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF), funded by Ministry of Education, Science and Technology (2009-0093818).