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Actuators
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Ferroelectric Materials and Piezoelectric Actuators
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Ferroelectric Materials and Piezoelectric Actuators

A special issue of Actuators (ISSN 2076-0825). This special issue belongs to the section "Actuator Materials".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 12238

Special Issue Editors

Prof. Dr. Junhui Hu

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Guest Editor
State Key Lab of Mechanics and Control of Mechanical, Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: ultrasonic sensors and actuators; ultrasonic nanofabrication and ultrasonic micro/nano/molecular manipulations
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Tadej Rojac

E-Mail Website
Guest Editor
Electronic Ceramics Department, Jozef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia
Interests: piezoelectrics; perovskites; ceramic processing; structure–properties relationships
Special Issues, Collections and Topics in MDPI journals
Dr. Julian Walker

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, Sem Sælands vei 12, 7034 Trondheim, Norway
Interests: fundamental composition; structure and property relationships in ferroelectrics; engineering of plastic crystal ferroics; piezoelectric thin films for specialized MEMS applications; lead-free ferroelectrics and multiferroics; in situ and advanced electromechanical characterization techniques; sustainable electronics

Special Issue Information

Dear Colleagues,

Ferroelectric materials have wide promising applications in computer RAM, sensing, imaging, chemical reaction catalyses, precision driving motors, micro/nano/molecular manipulations, energy harvesting, transduction, etc. This Special Issue covers the latest advances in ferroelectric materials, piezoelectric actuators, and their applications. Thematic areas include (i) the relationships between the processing, structure, microstructure, and functional response of ferroelectric and related materials in the form of bulk polycrystalline ceramics, single crystals, and thick or thin films, (ii) novel functionalities or a combination of properties oriented toward new application areas, and (iii) the modeling and characterization of piezoelectric materials and their performance in a wide range of devices and applications. The topics in this Special Issue include, but are not limited to:

  • Advances in ferroelectric materials;
  • Multiferroic materials and devices;
  • Ferroelectric capacitors, RAM, and tunnel junctions;
  • Pyroelectric and electrocaloric (multicaloric) devices;
  • Adsorption and catalytic properties of ferroelectrics;
  • Piezoelectric energy harvesting;
  • Piezoelectric/ultrasonic motors;
  • Piezoelectric/ultrasonic transducers;
  • Lead-free piezoelectric materials and actuators;
  • Micro/nano/molecular manipulations;
  • Piezoelectrically actuated micro/nano fluidic devices;
  • Processing and fabrication assisted by piezoelectric vibration.

Prof. Dr. Junhui Hu
Prof. Dr. Tadej Rojac
Dr. Julian Walker
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Actuators is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Ferroelectric materials
  • Ferroelectric devices
  • Piezoelectric actuators
  • Energy harvesting
  • Ultrasonic motors
  • Ultrasonic transducers
  • Multiferroic materials
  • Acoustic manipulation
  • Ultrasonic fabrication
  • Ultrasonic processing

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (4 papers)

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Research

19 pages, 8184 KiB  
Article
Robust Control Design Based on Perturbation Cancellation for Micro-Positioning Design with Hysteresis
by Yung-Yue Chen, Yu-Jen Lan and Yi-Qing Zhang
Actuators 2021, 10(11), 278; https://doi.org/10.3390/act10110278 - 21 Oct 2021
Cited by 2 | Viewed by 1829
Abstract
Based on the superiority of the piezoelectric elements, including lightweight, high electric mechanical transformation efficiency and a quick response time, a piezoelectric-based micro-positioning actuator is developed in this investigation. For eliminating the effects of hysteresis and modeling uncertainties that appeared in this micro-positioning [...] Read more.
Based on the superiority of the piezoelectric elements, including lightweight, high electric mechanical transformation efficiency and a quick response time, a piezoelectric-based micro-positioning actuator is developed in this investigation. For eliminating the effects of hysteresis and modeling uncertainties that appeared in this micro-positioning actuator, a nonlinear adaptive fuzzy robust control design with a perturbation cancellation ability is proposed for this micro-positioning design to achieve a positioning resolution of 1 μm. Structurally, this proposed robust control methodology contains two particular parts: a universal fuzzy approximator and a robust compensator, which are employed to cancel the modeling uncertainties caused by the perturbed parts of the micro-positioning actuator and mitigate the approximation error between the modeling uncertainties and the universal fuzzy approximator, respectively. From both the numerical simulations and real validations, this proposed micro-positioning design performs a promising positioning performance in the micrometer level. Full article
(This article belongs to the Special Issue Ferroelectric Materials and Piezoelectric Actuators)
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14 pages, 12510 KiB  
Communication
Mechanism and Experiment Study of Non-Contact Ultrasonic Assisted Grinding
by Weiqing Huang, Qunyou Zhong, Dawei An, Chenglong Yang and Yi Zhang
Actuators 2021, 10(9), 238; https://doi.org/10.3390/act10090238 - 14 Sep 2021
Cited by 2 | Viewed by 3393
Abstract
Ultrasonic-assisted grinding processing can effectively reduce the surface roughness and enhance the processing efficiency in the processing of hard and brittle materials. However, the most common ultrasonic assisted grinding is a type of contact ultrasonic grinding where the grinding tool directly contacts the [...] Read more.
Ultrasonic-assisted grinding processing can effectively reduce the surface roughness and enhance the processing efficiency in the processing of hard and brittle materials. However, the most common ultrasonic assisted grinding is a type of contact ultrasonic grinding where the grinding tool directly contacts the workpiece, which means that it is necessary to accurately control the pre-pressure of the grinding tool on the workpiece. The control of pre-pressure will inevitably increase the complexity of the grinding device, and it is easy to wear the workpiece because of improper pre-pressure control. In this paper, a non-contact ultrasonic grinding method is proposed and the machining mechanism of non-contact ultrasonic grinding is revealed. The resonant frequency of the ultrasonic vibration system and vibration amplitude of the grinding tool working face were simulated and experimentally tested, respectively. Then, the experiment of non-contact ultrasonic grinding of a sapphire wafer was carried out. The result showed that non-contact ultrasonic grinding of the sapphire wafer could reduce the surface roughness by 48.6%. Compared with traditional contact grinding of sapphire wafer under certain pre-pressure conditions, the experimental results show that non-contact ultrasonic grinding has better effects in reducing surface roughness, improving processing efficiency, and improving the quality uniformity of the workpiece machining surface. Full article
(This article belongs to the Special Issue Ferroelectric Materials and Piezoelectric Actuators)
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17 pages, 3535 KiB  
Article
Cold Sintering of PZT 2-2 Composites for High Frequency Ultrasound Transducer Arrays
by Shruti Gupta, Dixiong Wang, Smitha Shetty, Amira Meddeb, Sinan Dursun, Clive A. Randall and Susan Trolier-McKinstry
Actuators 2021, 10(9), 235; https://doi.org/10.3390/act10090235 - 13 Sep 2021
Cited by 4 | Viewed by 3326
Abstract
Medical ultrasound and other devices that require transducer arrays are difficult to manufacture, particularly for high frequency devices (>30 MHz). To enable focusing and beam steering, it is necessary to reduce the center-to-center element spacing to half of the acoustic wavelength. Conventional methodologies [...] Read more.
Medical ultrasound and other devices that require transducer arrays are difficult to manufacture, particularly for high frequency devices (>30 MHz). To enable focusing and beam steering, it is necessary to reduce the center-to-center element spacing to half of the acoustic wavelength. Conventional methodologies prevent co-sintering ceramic–polymer composites due to the low decomposition temperatures of the polymer. Moreover, for ultrasound transducer arrays exceeding 30 MHz, methods such as dice-and-fill cannot provide the dimensional tolerances required. Other techniques in which the ceramic is formed in the green state often fail to retain the required dimensions without distortion on firing the ceramic. This paper explores the use of the cold sintering process to produce dense lead zirconate titanate (PZT) ceramics for application in high frequency transducer arrays. PZT–polymer 2-2 composites were fabricated by cold sintering tape cast PZT with Pb nitrate as a sintering aid and ZnO as the sacrificial layer. PZT beams of 35 μm width with ~5.4 μm kerfs were produced by this technique. The ZnO sacrificial layer was also found to serve as a liquid phase sintering aid that led to grain growth in adjacent PZT. This composite produced resonance frequencies of >17 MHz. Full article
(This article belongs to the Special Issue Ferroelectric Materials and Piezoelectric Actuators)
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15 pages, 4016 KiB  
Communication
Parameter Identification of the Nonlinear Piezoelectric Shear d15 Coefficient of a Smart Composite Actuator
by Pelin Berik and Peter L. Bishay
Actuators 2021, 10(7), 168; https://doi.org/10.3390/act10070168 - 19 Jul 2021
Cited by 2 | Viewed by 2540
Abstract
The objective of this work is to characterize the nonlinear dependence of the piezoelectric d15 shear coefficient of a composite actuator on the static electric field and include this effect in finite element (FE) simulations. The Levenberg-Marquardt nonlinear least squares optimization algorithm [...] Read more.
The objective of this work is to characterize the nonlinear dependence of the piezoelectric d15 shear coefficient of a composite actuator on the static electric field and include this effect in finite element (FE) simulations. The Levenberg-Marquardt nonlinear least squares optimization algorithm implemented in MATLAB was applied to acquire the piezoelectric shear coefficient parameters. The nonlinear piezoelectric d15 shear constant of the composite actuator integrated with piezoceramic d15 patches was obtained to be 732 pC/N at 198 V. The experimental benchmark was simulated using a three-dimensional piezoelectric FE model by taking piezoelectric nonlinearity into consideration. The results revealed that the piezoelectric shear d15 coefficient increased nonlinearly under static applied electric fields over 0.5 kV/cm. A comparison between the generated transverse deflections of the linear and nonlinear FE models was also performed. Full article
(This article belongs to the Special Issue Ferroelectric Materials and Piezoelectric Actuators)
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