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Issue 28, 2018
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Boosting energy harvesting performance in (Ba,Ca)(Ti,Zr)O3 lead-free perovskites through artificial control of intermediate grain size

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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

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Publication details

The article was received on 24 Apr 2018, accepted on 26 May 2018 and first published on 29 May 2018


Article type: Paper
DOI: 10.1039/C8DT01628C
Citation: Dalton Trans., 2018,47, 9257-9266
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    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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