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Issue 9, 2014
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New lead-free piezoelectric ceramics based on (K0.48Na0.52)(Nb0.95Ta0.05)O3–Bi0.5(Na0.7K0.2Li0.1)0.5ZrO3

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(1 − x)(K0.48Na0.52)(Nb0.95Ta0.05)O3xBi0.5(Na0.7K0.2Li0.1)0.5ZrO3 lead-free piezoelectric ceramics with a new type of phase boundary have been designed and fabricated. This phase boundary lies in the compositional range of 0.04 ≤ x ≤ 0.05, and is formed by the coexistence of the rhombohedral, orthorhombic, and tetragonal phases. Interestingly, we found that the ferroelectric, dielectric, and piezoelectric properties of the ceramics with compositions near the phase boundary are significantly enhanced. In particular, the ceramic with x = 0.045 shows the best piezoelectric behavior of d33 ∼ 290 pC/N and kp ∼ 0.42 among all the compositions studied in this work, and it also exhibits a good thermal stability at annealing temperatures of ≤270 °C. All these results indicate that such a material system is a good candidate for lead-free piezoelectric applications in the future.

Graphical abstract: New lead-free piezoelectric ceramics based on (K0.48Na0.52)(Nb0.95Ta0.05)O3–Bi0.5(Na0.7K0.2Li0.1)0.5ZrO3

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Publication details

The article was received on 20 Sep 2013, accepted on 03 Jan 2014 and first published on 07 Jan 2014

Article type: Communication
DOI: 10.1039/C3DT52603H
Citation: Dalton Trans., 2014,43, 3434-3442

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    New lead-free piezoelectric ceramics based on (K0.48Na0.52)(Nb0.95Ta0.05)O3–Bi0.5(Na0.7K0.2Li0.1)0.5ZrO3

    X. Cheng, J. Wu, X. Wang, B. Zhang, J. Zhu, D. Xiao, X. Wang and X. Lou, Dalton Trans., 2014, 43, 3434
    DOI: 10.1039/C3DT52603H

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