High piezoelectric properties in 0.7BiFeO3–0.3BaTiO3 ceramics with MnO and MnO2 addition

Temperature-Dependent Ferroelectric Properties and Aging Behavior of Freeze-Cast Bismuth Ferrite–Barium Titanate Ceramics

“…The laboratory XRD pattern of the dense BFBT30 ceramic showed a pure perovskite phase with no visible impurities; see Figure a. The distinct splitting of 111 Bragg peaks and singlet 200 Bragg peaks confirmed the rhombohedral ( R 3 c ) symmetry, which is consistent with previously reported structure from the same composition . There was no significant change in the structure observed between the XRD of the porous shown in Figure S1 compared to the dense BF-BT.…”

“…17 Of the lead-free piezoceramics of interest for high temperature applications, bismuth ferrite−barium titanate (BF-BT) ferroelectrics have shown great promise, with Curie points of over 400 °C and piezoelectric charge coefficients of >200 pC/N. 18 Various strategies have been used to promote high piezoelectric properties in BF-BT ceramics, including doping 19 and quenching 20 to lock in desirable microstructures and defect structures. In applications involving high temperature actuators, the electrostrain should remain steady even as the temperature is elevated.…”

Piezoelectric properties of mechanochemically processed 0.67BiFeO3-0.33BaTiO3 ceramics

“…An overview of ferro-, piezo-and dielectric properties of materials from the literature with similar composition as ours is presented in Table S.2 (supplementary information). All the P r values are in the high end compared to the previously reported values (P r =15-30 µC/cm 2 ) for the same composition [38,[42][43][44][45]. Since higher polarization values are typically observed for more homogeneous BF-BT ceramics (e.g.…”

“…Here we can see that the S-samples all have significantly lower d 33 values (33-47 pC/N) than the U-samples (97-115 pC/N). The highest S.2) [38,[42][43][44][45].…”

Influence of MnO2 on the ferroelectric properties, energy storage efficiency and piezoelectric properties of high-temperature Bi3TaTiO9 ceramics

“…[25][26][27] According to several investigations, Mn 4+ acts as a donor dopant and improves piezoelectric and ferroelectric behaviors. [28][29][30] A recent study found that adding 0.25 mol% MnO 2 to lead-free Bi 0.5 Na 0.5 TiO 3 -Bi 0.5 K 0.5 TiO 3 -BaTiO 3 piezoelectric ceramics increased their d 33 performance by 40%. 31 Parallel to this, Huajun, et al reported that doping MnO 2 improved the d 33 and electromechanical properties of Ba 0.98 Ca 0.02 Zr 0.02 Ti 0.98 O 3 .…”