Review of chemical modification on potassium sodium niobate lead-free piezoelectrics

Piezoelectric materials convert mechanical energy into electric energy, and vice versa . They have been applied in many critical fields, such as motor vehicles, medical devices, the military and aerospace. Recently, the development of lead-free piezoelectrics due to environmental concerns has attrac...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 7; no. 15; pp. 4284 - 433
Main Authors Zhang, Yichi, Li, Jing-Feng
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 2019
Subjects
Electronegativity
Lead free
Medical devices
Medical electronics
Motor vehicles
Niobates
Organic chemistry
Piezoelectricity
Potassium
Sodium compounds
Stability analysis
Thermal stability
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Summary:Piezoelectric materials convert mechanical energy into electric energy, and vice versa . They have been applied in many critical fields, such as motor vehicles, medical devices, the military and aerospace. Recently, the development of lead-free piezoelectrics due to environmental concerns has attracted enormous attention in both scientific and industrial fields. This review summarises the effect of chemical modification on the enhancement of potassium sodium niobate lead-free piezoelectric materials. The origin of the high piezoelectricity is attributed to the construction of phase coexistence and local heterogeneities. The choice of dopants is discussed from the aspects of ionic radius, valency, electronegativity and hybridisation, as well as their influence on thermal stability and fatigue behaviour. An assessment of heterogeneity at different length scales on the piezoelectric performance is provided. Heterogeneity at different length scales.
Bibliography:Dr Yichi Zhang is a Postdoctoral Fellow in the School of Materials Science and Engineering in Tsinghua University, China. He received a PhD degree from the University of New South Wales (UNSW Sydney) in 2015. He conducted parts of his PhD studies at Purdue University, USA. In 2017, he joined Tsinghua University with a National Talent Postdoctoral Fellowship and received a first-class General Financial Grant from the China Postdoctoral Science Foundation. His primary research interests include the macroscopic and structural properties, low-temperature sintering and multilayer fabrication of lead-free piezoelectric materials and antiferroelectric materials as well as ageing and fatigue behaviour.
Jing-Feng Li is a "Changjiang Scholar" distinguished Professor in the School of Materials Science and Engineering at Tsinghua University. He received Master and Doctor degrees from Tohoku University (Japan) in 1988 and 1991, respectively. He worked at Tohoku University, Japan, as an assistant professor from 1992 to 1997, and as an associate professor until 2002. He joined Tsinghua University, China, as a full professor in 2002. His research interests include piezoelectric ceramics, composites and films, thermoelectric materials and micro-devices. Prof. Li is the editor-in-chief of the Journal of Materiomics and associate editor-in-chief of the Journal of Chinese Ceramics Society.
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ISSN:2050-7526
2050-7534
DOI:10.1039/c9tc00476a