Antiferroelectric to Ferroelectric Crossover and Energy Storage Properties of (Pb_1−xLa_x)(Zr_0.90Ti_0.10)_1−x/4O₃ (0.02 ≤ x ≤ 0.04) Ceramics

Abstract

Polarization switching behavior and energy storage performances of (Pb 1x La x )(Zr 0.90 Ti 0.10 ) 1x/4 O 3 (PLZT x/90/10) ceramics with La compositions across the ferroelectric/antiferroelectric phase boundary, which show variable amount of antiferroelectric (AFE) orthorhombic and ferroelectric (FE) rhombohedral phases, were investigated. A low AFE to FE switching field was obtained and its value could be adjusted by La chemical modification. While the PLZT system evolves from a FE state to an AFE state as a function of La content and from an AFE state to a FE state as a function of the applied electric field, the recoverable energy (W re ) and loss energy (W loss ) range between two limits whose lower and higher values are obtained for PLZT composition in AFE state and FE state, respectively. In terms of the extent of La-modification, the W re has been enhanced from 0.819 J/cm 3 (for PLZT 2/90/10 and electric field of~30 kV/cm) to the highest value of 1.85 J/cm 3 (for PLZT 3.5/90/10 and electric field 65 kV/cm), followed by their subsequent reduction.Eight (Pb 1Àx La x )(Zr 0.90 Ti 0.10 ) 1Àx/4 O 3 (PLZT x/90/10) ceramic compositions across the FE/AFE phase boundary were selected (with La 3+ content x = 0.020, 0.030, 0.031, 0.032, G. L. Brennecka-contributing editor Manuscript No. 37930.

High Energy Storage Density and Impedance Response of PLZT2/95/5 Antiferroelectric Ceramics

“…The relative permittivity curves exhibited anomalous peaks with hollow circles at about 155 °C and 225 °C, respectively. The small anomalous peak was interpreted by the phase transition AFE to FE [22,23] ( T o = 155 °C), whereas the maximum anomalous peak was linked with the transformation of FE to PE phase ( T C = 225 °C) at the higher temperature. The samples exhibited FE and AFE coexistence state when T exceeds T o and PE state when T exceeds T C [3].…”

Field-induced antiferroelectric to ferroelectric transitions in (Pb1–xLax)(Zr0.90Ti0.10)1–x/4O3 investigated by in situ X-ray diffraction

“…4,[6][7][8][9][10] AFEs do not exhibit macroscopic spontaneous polarization because the antiparallel orientation of neighboring dipoles oppose one another. An electric field of amplitude EAFE-FE can induce switching of antiparallel to a parallel dipolar alignment (firstorder AFE-to-FE phase transition).…”

“…AFE lead lanthanum zirconate titanate (Pb1-xLax)(Zr0.90Ti0.10)1-x/4O3 (PLZT x/90/10) ceramics have received increasing interest due to their composition dependent phase boundary region between rhombohedral and orthorhombic phases. 10,[24][25][26]28 Due to the proximity of the FE/AFE phase boundary at 2 x 4 at % of La, a structural transition from orthorhombic Pbam to rhombohedral R3c is expected in AFE PLZT x/90/10 compositions during the application of adequate EAFE-FE threshold (15 EAFE-FE 75 kV/cm) electric field. 10 The aim of this work is to study the structural evolution of the AFE, and field-induced FE phase using in situ X-ray diffraction (XRD) measurements.…”

“…10,[24][25][26]28 Due to the proximity of the FE/AFE phase boundary at 2 x 4 at % of La, a structural transition from orthorhombic Pbam to rhombohedral R3c is expected in AFE PLZT x/90/10 compositions during the application of adequate EAFE-FE threshold (15 EAFE-FE 75 kV/cm) electric field. 10 The aim of this work is to study the structural evolution of the AFE, and field-induced FE phase using in situ X-ray diffraction (XRD) measurements. Two compositions have been selected for detailed examination due to their location on either side of, and close proximity to, the FE/AFE phase boundary: PLZT 4/90/10 with previously observed AFE macroscopic character and PLZT 3/90/10 with macroscopic FE character.…”

“…an FE phase), a single P(E) is observed, whereas a double hysteresis loop is observed if FE phase reverts to the AFE state. 8,10,[12][13][14] It has been hypothesized that AFEs cannot be macroscopically poled. 11 However, recent investigations have demonstrated that the AFE composition (Pb0.99Nb0.02[(Zr0.57Sn0.43)0.92Ti0.08]0.98O3) with a field assisted AFE-to-FE transition remains in a stable FE phase after the field is removed.…”