Raman spectroscopy investigation on (Pb1La )(Zr0.90Ti0.10)1−/4O3 ceramic system

An effective strategy for enhancing energy storage density in (Pb1−1.5xGdx)(Zr0.87Sn0.12Ti0.01)O3 antiferroelectric ceramics

“…The A-site, B–O bond, and BO 6 vibration modes are distributed within different wavenumber ranges (<152, 152–400, and >400 cm −1 , respectively). 52 All peaks are softened as Gd 3+ content increases, showing that the cation disorder is strengthened. According to previous reports, this structural disturbance may result in an antiparallel polar order for the AFE phase and thus, may improve AFE stability.…”

Excellent energy‐storage property and thermal stability of PLZT‐based antiferroelectric ceramics

“…(A) The P – E loops and (B) the correlational W rec , W tot , and η of the PLZTYN3 ceramics from −55 to 75°C at 1‐Hz frequency. (C) The P – E loops and (D) the correlational W rec , W tot and η of the PLZTYN5 ceramics from −55 to 75°C at 1 Hz, (E) Temperature‐dependent W rec values for some reported ceramics 33,36,39‐46 …”

“…Although the doping ions lead to the reduction of transition field and W rec , the temperature stability gradually becomes better and η gradually increases due to the coexistence of structure. In the range of −55 to 75 • C, the W rec of PLZTYN5 is 6.8-8.2 J cm −3 and the change W rec values for some reported ceramics 33,36,[39][40][41][42][43][44][45][46] rate is less than 15%; the efficiency is 78%-86.7% only at an electric field strength of 300 kV cm −1 . This is a big value among the reported energy storage materials, as we can see in Figure 5E.…”

Synergistically Optimizing Pressure-Driven Energy Conversion and Energy-Harvesting Application via Modulating an Antiferroelectric-to-Ferroelectric Overlap Zone in Antiferroelectric Ceramics

“…A similar variation occurs around 110 and 130 cm –1 (shown in Figure e,f), at which their Raman shifts move toward a high wavenumber and the fwhm is broadening with the assistance of BAN. All these phenomena of A-site vibration modes indicate that the A-site ion vibration mode is changed and oxygen octahedra tilt modes are suppressed, caused by modified distortion and a weakened antiferroelectric characteristic. , Modes in 200–400 cm –1 are correlated with the vibrations of the B–O bond . The intensity of the ferroelectric mode 238 cm –1 is strengthened with the introduction of BAN, demonstrating the enhancement of the ferroelectric state.…”

“…Note that all the spectra are discerned as 18 modes in the shift range of 40–800 cm –1 on the basis of the Gaussian–Lorentzian fitting function. − Cell distortion caused by element substitution is manifested as symmetry variation, and vibration modes soften, which affects the intensity and displacement of Raman peaks indirectly. Generally, modes below 150 cm –1 are correlated with vibrations of A-site cations, like Pb 2+ and La 3+ cations in PLZT ceramics . Among them, two modes at the lowest frequency (50–70 cm –1 ) are considered as a THz frequency anharmonic component and a resonant component, both related to the same normal coordinate .…”