Issue 28, 2018

Boosting energy harvesting performance in (Ba,Ca)(Ti,Zr)O3 lead-free perovskites through artificial control of intermediate grain size

Abstract

In this study, (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 (BCTZ) lead-free ceramics with enhanced energy density were prepared by two-step sintering. All ceramics fall into the rhombohedral–orthorhombic–tetragonal (R–O–T) phase boundary near room temperature, and a dense microstructure with an intermediate grain size was observed. The enhanced piezoelectric and energy harvesting properties were attained over a wide grain size range of 10–15 μm, benefiting from the construction of the R–O–T phase boundary. Most interestingly, the maximum values of d33 and d33 × g33 (530 pC N−1 and 9720 × 10−15 m2 N−1) can be achieved at 1500/1350 °C with a grain size of 13.7 μm. The interpretation of the underlying mechanism related to domain and defect engineering has been investigated systematically. Furthermore, a high output power of 99 μW and an energy conversion efficiency of 10% were obtained at a simple cantilever energy harvester fabricated from a 1500/1350 °C specimen under an acceleration of 1.0g, making the current system very promising for piezoelectric energy harvesting applications.

Graphical abstract: Boosting energy harvesting performance in (Ba,Ca)(Ti,Zr)O3 lead-free perovskites through artificial control of intermediate grain size

Supplementary files

Article information

Article type
Paper
Submitted
24 Apr 2018
Accepted
26 May 2018
First published
29 May 2018

Dalton Trans., 2018,47, 9257-9266

Boosting energy harvesting performance in (Ba,Ca)(Ti,Zr)O3 lead-free perovskites through artificial control of intermediate grain size

X. Yan, M. Zheng, S. Sun, M. Zhu and Y. Hou, Dalton Trans., 2018, 47, 9257 DOI: 10.1039/C8DT01628C

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