The electrostrictive effect and dielectric properties of lead-free 0.5Ba(ZrxTi1−x)O3–0.5(Ba0.75Ca0.25)TiO3 ceramics

Electromechanical properties of Ce-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics

“…Higher Ce content led to lower polarization and narrowed hysteresis loops. However, Xiao et al [43] have argued that the lower remanent polarization of BCZT with increasing Zr content may be due to three different factors, including the depression of the oriented displacement of Ti 4+ after incorporation of Zr 4+ and the structural changes in the perovskite lattice. In the current study, the suppression of TiO 6 octahedra tilting by 2.5 mol% Ce addition may be indicated by lower P r and E c values in BCCe 2.5 ZT samples, which resemble relaxor behavior.…”

Effects of Bi2O3 additive on sintering process and dielectric, ferroelectric, and piezoelectric properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics

“…tal symmetry and a lower lattice distortion, inducing a relaxor-like behavior in the BCZT + Bi1 sample. Xiao et al have argued that the lower remanent polarization of BCZT with increasing Zr content may be due to the depression of the oriented displacement of Ti 4+ after incorporation of Zr 4+ and the structural changes in the perovskite lattice[56]. However, further structural studies are needed to get a detailed insight into the lattice distortions of the BCZT induced by Bi 2 O 3 addition.The bipolar strain hysteresis curves of BCZT + Bix samples are shown in…”

Electrostrictive effect and dielectric properties of lead-free 0·5Ba(ZrxTi1–x)O3–0·5(Ba0·75Ca0·25)TiO3 ceramics near morphotropic phase boundary (MPB) compositions

“…It has been suggested that 0?5Ba(Zr x Ti 1-x )O 3 -0?5(Ba 0?75 Ca 0?25 )TiO 3 (x50?20, 0?25) ceramics with twophase coexistence are prone to have a phase transformation induced by an external electric field, which leads to the increase of ferroelectric domains and the orientation becomes easier, and as a consequence, a larger strain value S max 50?16% when x50?25 under 50 kV cm 21 was obtained. [14][15][16] However, the present experimental result find that the maximum strain is obtained at x50?15, and the interpretations are given in previous sections In a word, the mechanism of enhanced electromechanical properties in ferroelectrics polycrystals is very complex because of the presence of residual stresses and grain boundary mismatch as well as the internal domain structure. [17][18][19] Conclusion The 0?5Ba(Zr x Ti 1-x )O 3 -0?5(Ba 0?75 Ca 0?25 )TiO 3 (x50?15, 0?20, 0?25 and 0?30) lead-free ceramics were synthesized through a conventional solid-state reaction method and investigated at room temperature.…”