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Review on piezoelectric actuators:materials,classifications,applications,and recent trends

Frontiers of Mechanical Engineering 2024年第1期19卷 5-33页

作者： Xuyang ZHOU Shuang WU Xiaoxu WANG Zhenshan WANG Qixuan ZHU Jinshuai SUN Panfeng HUANG Xuewen WANG Wei HUANG Qianbo LU Institute of Flexible Electronics(IFE) Northwestern Polytechnical UniversityXi’an 710072China School of Automation Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Flexible Electronics of Zhejiang Province Ningbo Institute of Northwestern Polytechnical UniversityNingbo 315103China

piezoelectric actuators are a class of actuators that precisely transfer input electric energy into displacement,force,or movement outputs efficiently via inverse piezoelectric effect-based electromechanical *** types of piezoelectric actuators have sprung up and gained widespread use in various applications in terms of compelling attributes,such as high precision,flexibility of stoke,immunity to electromagnetic interference,and structural *** paper systematically reviews the piezoelectric materials,operating principles,representative schemes,characteristics,and potential applications of each mainstream type of piezoelectric ***,we intend to provide a more scientific and nuanced perspective to classify piezoelectric actuators into direct and indirect categories with several *** addition,this review outlines the pros and cons and the future development trends for all kinds of piezoelectric actuators by exploring the relations and mechanisms behind *** rich content and detailed comparison can help build an in-depth and holistic understanding of piezoelectric actuators and pave the way for future research and the selection of practical applications.

关键词： piezoelectric actuator piezoelectric effect amplified piezoelectric actuator ultrasonic actuator stepping actuator piezoelectric polymer

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The past,present,and future of piezoelectric fluoropolymers:Towards efficient and robust wearable nanogenerators

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Nano Research Energy 2023年第4期2卷 41-77页

作者： Md.Mehebub Aam Xavier Crispin Laboratory of Organic Electronics Department of Science and TechnologyLinköping UniversityNorrköping SE-60174Sweden

Polyvinylidene difluoride(PVDF)derivatives in metal/PVDF/metal(MPM)sandwich structures have been studied extensively since *** copolymers of the same family have been discovered with fascinating piezoelectric,pyroelectric,electrocaloric,and ferroelectric *** processing,flexibility,lightweight,and thermal stability make this class of materials complementary to ***,PVDF based polymers potentially compete with inorganic materials for a broad range of technologies such as energy generators,loudspeakers,coolers,and ***,the stable non-electroactiveα-phase and hydrophobic nature of PVDF are the main barriers for developoing high performing and robust MPM devices in electronic *** this review,we present an up-to-date overview on different methods to induce the electroactiveβ-phase and improve the adhesion strength with metals to ensure robust and durable MPM *** go through advantages and disadvantages of several methods and pinpoint future opportunities in this research area.A special attention is paid to wearable piezoelectric nanogenerators for energy harvesting from human body motion,where flexible PVDF derivatives are compared with rigid piezoelectric *** the piezoelectric coefficient of PVDF(d_(33)~24–34 pm/V)is one order lower than ceramic materials,novel co-polymers of PVDF display d_(33)>1000 pm/V upon *** shows promise to bring piezoelectrics to flexible and large-area applications such as smart *** also discussed challenges to improve wearability,such as light weight,breathability,and flexibility.

关键词： polyvinylidene difluoride(PVDF) nanogenerators energy harvesting piezoelectric polymer surface modification metal-PVDF adhesion wearable generators

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Wave‑Shaped piezoelectric Nanofber Membrane Nanogenerator for Acoustic Detection and Recognition

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Advanced Fiber Materials 2021年第6期3卷 368-380页

作者： Fan Xu Jiang Yang Ruizhi Dong Hanxiao Jiang Conghuan Wang Weilin Liu Zaixiu Jiang Xiaoqing Zhang Guodong Zhu Department of Materials Science Fudan UniversityShanghai 200433China Institute of Acoustics School of Physics Science and EngineeringTongji UniversityShanghai 200092China Shanghai Key Laboratory of Special Artifcial Microstructure Materials and Technology School of Physics Science and EngineeringTongji UniversityShanghai 200092China

With the rapid development of internet of things and wearable electronics,how to conveniently power uncountable sensors remains a huge *** harvesting strategy is suggested to collect and convert environmental energies into electrical ***,piezoelectric polymers are utilized as fexible harvesters to convert mechanical *** latter widely distributes in both our daily life and industrial *** piezoelectric property further drives piezoelectric polymers to construct fexible self-powered strain ***,relatively low piezoelectric performance restricts their application in detection and conversion of weak mechanical ***,wave-shaped 3D piezoelectric device was fabricated by embossing electrospun polyvinylidene fuoride *** 3D structured device presents better longitudinal and transverse piezoelectric performance than usual fat-type *** wave-shaped piezoelectric device was developed for acoustic detection and recognition with a frequency resolution better than 0.1 *** wave-shaped device was capable of frequency spectrum analyses of various sound sources from human and animals and well presents its potential for future wearable acoustic sensors and transducers.

关键词： piezoelectric polymer PVDF Wave-shaped device Acoustic detection

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