Achieving superior energy harvesting performance in Sr-doped (Pb,La,Sb)(Zr,Ti)O3 ceramics based on optimization of FOM

• Published in: Journal of materials science. Materials in electronics Vol. 34; no. 7; p. 653
• Main Authors: Lu, Xinyue, Hao, Yifan, Yang, Tongqing
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2023; Springer Nature B.V
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Diaphragms; Electric properties; Energy; Energy harvesting; Laboratories; Materials Science; Optical and Electronic Materials; Optimization; Phase transitions; Piezoelectricity; Zirconium
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-10014-8

The piezoelectric circular diaphragms (PCDs) applied to energy harvesters have great application potential for replacing chemical batteries to power microelectronic devices. However, the output power of PCDs is highly restricted by the value of d 33 2 / ε r (defined as FOM) of selected materials. Herein, the (Pb 0.925− x La 0.04 Sb 0.035 Sr x )(Zr 0.55 Ti 0.45 ) 0.99 O 3 (abbreviated as PLSSZT, x  = 0–0.06) ceramics prepared by the traditional solid-state method are reported. The results show that when x  = 0.02, a morphotropic phase boundary (MPB) with a coexistence of rhombohedral (R) and tetragonal (T) phases is found which greatly optimizes the comprehensive properties of the ceramics (i.e., d 33  ~ 850 pC/N, k p ~ 62%, strain ~ 0.27% at 40 kV/cm). Meanwhile, the ceramics show a relatively low ε r of 3700 under 10 kHz, thus a large FOM can be achieved. Therefore, the PCD based on the (Pb 0.905 La 0.04 Sb 0.035 Sr 0.02 )(Zr 0.55 Ti 0.45 ) 0.99 O 3 ceramics possesses a high output power of 8.3 mW under the 15 g proof mass, and can drive multiple LEDs, which is of reference significance for promoting the development of energy harvesters.