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Potassium‐Sodium‐Niobate‐Based Thin Films: Lead Free for Micro‐Piezoelectrics
Author(s) -
Zhang SuWei,
Zhou Zhen,
Luo Jin,
Li JingFeng
Publication year - 2019
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.201800525
Subject(s) - piezoelectricity , materials science , ferroelectricity , thin film , microelectromechanical systems , nanotechnology , lead (geology) , natural bond orbital , ceramic , engineering physics , optoelectronics , dielectric , composite material , geomorphology , geology , density functional theory , chemistry , computational chemistry , engineering
Extensive research and great progress of (K,Na)NbO 3 (KNN)‐based lead‐free piezoelectric films have been driven by the current legislation and the requirement for sustainable development of society and environment in the applications of microelectromechanical systems. A comprehensive discussion of the recent achievement in KNN‐based films is presented herein. First, the available synthetic techniques, chemical modification, the ferroelectric and piezoelectric properties of KNN‐based films are reviewed, followed by an introduction of the crystal structures and electrical properties of KNN‐based epitaxial films in comparison with the bulk ceramics. Finally, the applications of KNN‐based films for the sensors, the energy harvesters, and energy storage devices are addressed, and current challenges and prospects for future work are discussed.