New Lead-Free Ferroelectric Materials for High-Temperature Applications: Nb-Doped Bi3.5Nd0.5Ti3 O12
Bi3.5Nd0.5Ti3O12 (BNT) ferroelectrics modified with different concentrations of Nb are prepared by a hot-pressing method. XRD diffraction shows that all samples have only a layeredstructured pervoskite phase. Raman spectra confirm that the crystal symmetry change locally when increasing Nb concentration. It is found that the introduction of a suitable amount of Nb can enhance the remnant polarization of BNT. The temperature dependence of dielectric constant is also investigated in BNT ceramics. All samples have high Curie temperature above 530°C.
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Z. P. Cao et al., "New Lead-Free Ferroelectric Materials for High-Temperature Applications: Nb-Doped Bi3.5Nd0.5Ti3 O12", Key Engineering Materials, Vols. 280-283, pp. 247-250, 2005