High energy density at high temperature in PLZST antiferroelectric ceramics

Abstract

PLZST ceramics possess good energy density at high temperature (100–175 °C) due to phase transitions.

Soft modes condensation in Raman spectra of (Pb–La)(Zr–Sn–Ti)O3 ceramics

“…Ceramic samples of (Pb 0:97 La 0:02 Þ(Zr 0:864 Sn 0:04 Ti 0:096 ÞO 3 have been synthesized by traditional hot pressing technique; X-ray analysis confirmed single phase composition of the samples, and dielectric measurements showed single cubic to AFE phase transition at about 200 ○ C. In the low frequency Raman spectra, we observed a set of soft modes restoring below the transition point, in addition to the mode above 100 cm À1 observed earlier. 7,8 These modes show strong damping anomalies at the transition point that supposes considerable intermode interactions via dampings.…”

“…It should be noted that lower frequency part of Raman spectra of pure PbZrO 3 single crystals have been studied earlier 7 and one soft mode restoring was found at about 100 cm À1 . Recently, Raman spectra of closer composition ceramics were published 8 and similar soft mode was observed, but frequency range below 100 cm À1 was not investigated. Same single soft mode was found earlier 9,10 in PLZST ceramics of rather different compositions and phase diagram.…”

Progress and perspectives in dielectric energy storage ceramics

“…La 3+ and Sn 4+ are very popular A/B site dopants in PZT 95/5 ceramics where their functions are similar [178][179][180][181][182]. La 3+ , as a donor dopant, substitutes Pb 2+ to disturb long-range ordering of domain by vacancy defect, which would strengthen the relaxor characteristic and expand the stabilized region of the antiferroelectric phase.…”

Insight into the Impact of Zr/Ti Ratios on the Structure and Properties of (Pb, La)(Zr, Sn, Ti)O3 Antiferroelectric Thick Films

“…[ 13 ] By finely calibrating the balance of Zr/Sn/Ti, a recoverable energy density of 2.0–3.4 J cm −3 and an energy storage efficiency of ≈80% were achieved in the temperature range of 100–175 °C. [ 14 ] However, most of the research is based on a low La content at 2 mol%. [ 15,16 ] According to the report, with the increasing range of La content, the microstructure of (Pb, La)(Zr, Ti)O 3 (PLZT) ceramics changes from the normal micrometer‐sized FE domains to tweed‐like precursor structures, followed by a shift to a nano‐domain state, which causes a series of performance changes.…”