Phase transition and energy storage performance in Ba-doped PLZST antiferroelectric ceramics

Abstract

Pb 0.97-x Ba x La 0.02 )(Zr 0.7 Sn 0.27 Ti 0.03 ) (0 \ x \ 0.08) antiferroelectric (AFE) ceramics were successfully fabricated by a solid state reaction, and the effect of barium (Ba) additions and temperature on the dielectric properties and energy storage performance were investigated. The ceramics with lower Ba content undergo two phase transitions during heating from room temperature to 300°C: orthorhombic (O)-rhombohedral (R)-cubic (C). With the increase of Ba content, dielectric constants increased and transition temperature decreased obviously. The ferroelectric phase was induced as the composition x increased from 0 to 0.08, however, which was not stable and transformed into AFE state upon heating, and then paraelectric phase, which was confirmed by DC field dependence of dielectric constant. The polarization sharply increased from 9.7 lC/cm 2 at 20°C to 24. 6lC/cm 2 at 100°C in (Pb 0.89 Ba 0.08 La 0.02 )(Zr 0.7 Sn 0.27 Ti 0.03 ) ceramic. As a result, the maximum recovered energy density of 2.1 J/cm 3 was obtained at 80°C, and the corresponding energy-storage efficiency was 76.5 %, which made this material a promising potential application in capacitors for pulsed power systems.

Temperature Dependence of Energy Storage in Pb0.90La0.04Ba0.04[(Zr0.7Sn0.3)0.88Ti0.12]O3 Antiferroelectric Ceramics

“…As an ideal dielectric for capacitors, antiferroelectric (AFE) has drawn significant attention for its high‐energy density and discharge efficiency . In former works, enormous types of AFE materials, especially the La 3+ , Ba 2+ , or Sr 2+ doped lead zirconate stannate titanate (PZST), have been studied to achieve high‐energy density . However, reports about the temperature dependence of energy storage properties in AFE are relatively fewer.…”

“…6,7 In former works, enormous types of AFE materials, especially the La 3+ , Ba 2+ , or Sr 2+ doped lead zirconate stannate titanate (PZST), have been studied to achieve high-energy density. [8][9][10][11][12][13][14][15][16][17][18] However, reports about the temperature dependence of energy storage properties in AFE are relatively fewer. In practice, capacitors usually work in a wide temperature range.…”

Antiferroelectric to relaxor ferroelectric phase transition in PbO modified (Pb0.97La0.02)(Zr0.95Ti0.05)O3 ceramics with a large energy-density for dielectric energy storage

“…7. 2,3, 19,28,[38][39][40][41][42][43][44][45] It can be seen that the PLZT2/95/5 ceramics possessed a very high energy-storage density simultaneously with the high energy-storage efficiency. In practical application, people oen desire a larger recoverable energy density J reco and a higher energy-storage efficiency h. Our work was superior to prior reported results as shown in Fig.…”

Giant negative electrocaloric effect in B-site non-stoichiometric (Pb0.97La0.02)(Zr0.95Ti0.05)1+yO3 anti-ferroelectric ceramics

“…The maximum dielectric constant for y = −0.03, −0.01, 0.01, and 0.03 is 3980, 4280, 4860, and 4790, respectively. Generally, the dielectric constant of AFEs material has a close relationship with the AFE phase, and higher stability of AFE phase usually leads to lower dielectric [17].…”