Microstructure, dielectric and ferroelectric properties of 0.94Bi0.5Na0.5TiO3–0.06BaTiO3 (NBTB) and 0.05BiFeO3–0.95NBTB ceramics: Effect of sintering atmosphere

Ferroelectric and piezoelectric properties of lead-free BaTiO3 doped Bi0.5Na0.5TiO3 thin films from metal-organic solution deposition

“…This ceramic also has deficiencies, including high conductivity and a large coercive field, which can cause problems in the poling process. These problems may be mitigated, however, by forming solid solutions of BNT with a variety of other compounds including BaTiO 3 [8], K 0.5 Bi 0.5 TiO 3 [9,10], Na 0.5 K 0.5 NbO 3 [11] and BiFeO 3 [12]. Among these solid solutions, there is significant interest in the (Bi 0.5 Na 0.5 ) 1Àx Ba x TiO 3 (BNT-BT) system owing to the morphotropic phase boundary (MPB) formed between its respective end members: the rhombohedral Bi 0.5 Na 0.5 TiO 3 and the tetragonal BaTiO 3 perovskites [13][14][15].…”

Templated grain growth of Bi(Zn0.5Zr0.5)O3modified BiScO3−PbTiO3piezoelectric ceramics for high temperature applications

“…However, it was around 5.5 μm for the random samples sintered under oxygen atmosphere (Figure 2(a)). The lower grain size for the random samples sintered in oxygen was probably attributed to the slowed grain growth rate due to the decreasing oxygen vacancy concentration responsible for promoting mass transport during sintering [20,21]. On the other hand, Bi-rich secondary phase detected by EDS (not shown here) along grain boundaries was also observed for the random samples sintered in air, however, not detected in the XRD spectrum in Figure 1 [11].…”

Up-conversion luminescence and electric properties of Tm3+/Yb3+ co-doped (0.94Na0.5Bi0.5TiO3–0.06BaTiO3) ceramics

“…The first dielectric anomaly peak occurs at the depolarization temperature T d , which is corresponding to the temperature of the first tand peak and the phase transition from ''ferroelectric'' state to ''anti-ferroelectric'' state. The second dielectric anomaly appears at temperature Tm, corresponding to a phase transition from''anti-ferroelectric''state to paraelectric state, at which maximal dielectric constant is achieved [6,18]. Dielectric constant enhances at samples of pure NBT-BT and NBT-BT:0.005Tm 3?…”