Observations on the structural, piezoelectric, and impedance properties of cation-(La and Sn) modified lead zirconium titanate (PLZST) ceramics

• Published in: Journal of materials science. Materials in electronics Vol. 35; no. 6; p. 454
• Main Authors: Tirumalasetti, Kalpana, Ashok, J., Gudiguntla, Ravi, Babu, N. Ch. Ramesh, Geetha, P., Prabhakar, Virupakshi, Nagaraju, G., Babu, A. Chitti, Sreedhar, Pandiri
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-02-2024; Springer Nature B.V
• Subjects: Antiferroelectricity; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composition; Depolarization; Figure of merit; High temperature; Impedance; Materials Science; Optical and Electronic Materials; Phase transitions; Piezoelectricity; Tin; Zirconium titanates
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-024-12244-w

The structural ambiguity was resolved quantitatively with dual-phase models of
Cc + P4mm.
Multiple-phase transition behaviors including Antiferroelectric (AFE) to Ferroelectric transition, transition at depolarization temperature, and AFE to paraelectric state transition were observed among PLZST samples and investigated in detail. The piezoelectric and impedance features of a modified PZT ceramic that has different mole ratios of La and Sn co-substitution are shown here. The principle of Archimedes shows that the synthesized specimens have sufficient density for withstanding high temperatures and higher fields while explaining them. We concentrated on the impedance and piezoelectric coefficients d
33
, g
33
, and figure of merit (FOM) of the ideal PbLaZrSnTiO
3
(PLZST) composition (50/30/20) in this study. The PLZSTs consist of two phases (
Cc
 + 
P4mm
), which combine to generate a single phase with a high Sn content and a low La content. These structural correlations coexist with the dual evaluation of impedance and piezoelectric characteristics in order to produce optimum composition. In order to evaluate the impedance features, the property of activation energy for the grains also supports the PLZST (50/30/20) having superior properties among PLZSTs. The optimum composition will meet the current business's commercial needs through multiple windows.