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Journal of Advanced Ceramics 2012, 1(1): 24-37 https://doi.org/10.1007/s40145-012-0003-3
Review | Open Access | Issue | Published: 29 June 2012

(K, Na)NbO3-based lead-free piezoceramics: Phase transition, sintering and property enhancement

Show Author's Information Ke WANG,  Jing-Feng LI*( )
State Key Laboratory of New Ceramic and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Keywords:
electrical properties, lead-free, ferroelectric properties, piezoelectric properties, perovskites, niobates
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WANG K, LI J-F. (K, Na)NbO3-based lead-free piezoceramics: Phase transition, sintering and property enhancement. Journal of Advanced Ceramics, 2012, 1(1): 24-37. https://doi.org/10.1007/s40145-012-0003-3
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Abstract Full text About this article

Most widely used piezoelectric ceramics are based on Pb(Zr,Ti)O3 (PZT) composition which has adverse environmental and health effects due to its high lead content. Environmental and safety concerns with respect to the utilization, recycling, and disposal of lead-based piezoelectric ceramics have induced a new surge in developing lead-free piezoelectric ceramics. Among all the lead-free ceramics, (K,Na)NbO3 (KNN) has drawn increasing attention because of its well-balanced piezoelectric properties and better environmental compatibility. On basis of the author's work, this review summarizes the progress that has been made in recent years on development of KNN-based piezoelectric ceramics, including crystallographic structure and phase transition analysis, pressurized solid-state sintering as well as liquid-phase-assisted sintering process, and poling treatment for property enhancement. All in all, KNN is a promising lead-free system, but more research is still required both from academic and industrial interests.


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About this article

(K, Na)NbO3-based lead-free piezoceramics: Phase transition, sintering and property enhancement

Show Author's information Ke WANG, Jing-Feng LI*( )
State Key Laboratory of New Ceramic and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Abstract

Most widely used piezoelectric ceramics are based on Pb(Zr,Ti)O3 (PZT) composition which has adverse environmental and health effects due to its high lead content. Environmental and safety concerns with respect to the utilization, recycling, and disposal of lead-based piezoelectric ceramics have induced a new surge in developing lead-free piezoelectric ceramics. Among all the lead-free ceramics, (K,Na)NbO3 (KNN) has drawn increasing attention because of its well-balanced piezoelectric properties and better environmental compatibility. On basis of the author's work, this review summarizes the progress that has been made in recent years on development of KNN-based piezoelectric ceramics, including crystallographic structure and phase transition analysis, pressurized solid-state sintering as well as liquid-phase-assisted sintering process, and poling treatment for property enhancement. All in all, KNN is a promising lead-free system, but more research is still required both from academic and industrial interests.

Keywords: electrical properties, lead-free, ferroelectric properties, piezoelectric properties, perovskites, niobates

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Publication history
Copyright
Acknowledgements
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Publication history

Received: 16 February 2012
Accepted: 01 March 2012
Published: 29 June 2012
Issue date: March 2012

Copyright

© The author(s) 2012

Acknowledgements

The authors appreciate the support by Tsinghua University Initiative Scientific Research Program and National Nature Science Foundation of China (Grant Nos. 50921061 and 51028202).

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Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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