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Dissertations / Theses on the topic 'Piezoelectric'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Yang, Xiaomei, and 楊笑梅. "Computational models for piezoelectrics and piezoelectric laminates." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31246217.

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2

Flynn, Anita M. "Piezoelectric Ultrasonic Micromotors." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/7086.

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This report describes development of micro-fabricated piezoelectric ultrasonic motors and bulk-ceramic piezoelectric ultrasonic motors. Ultrasonic motors offer the advantage of low speed, high torque operation without the need for gears. They can be made compact and lightweight and provide a holding torque in the absence of applied power, due to the traveling wave frictional coupling mechanism between the rotor and the stator. This report covers modeling, simulation, fabrication and testing of ultrasonic motors. Design of experiments methods were also utilized to find optimal motor

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3

Bruna, Magali. "Piezoelectric ceramic devices." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615866.

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4

Leinvuo, J. "Flextensional piezoelectric motors." Thesis, Cranfield University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409514.

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5

Boestad, Albin, and Fabian Rudberg. "Piezoelectric Guitar Tuner." Thesis, KTH, Mekatronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296320.

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This bachelor thesis in Mechatronics account for the process of constructing an automatic guitar tuner by means of a piezo-electric sensor, a stepper motor and Arduinobased control. The E4 - string on an acoustic guitar was used as a proxy for tuning any other possible guitar string. The accuracy and tuning-speed of the construction was examined through physical experimentation. Accuracy was measured in terms of the average distance from a piezo calibrated frequency value. The tuning-speed was appraisedby counting the number of times a guitar string had to be plucked before the motor stopped w

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6

Barham, Oliver M. "Microfabricated Bulk Piezoelectric Transformers." Thesis, University of Maryland, College Park, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10615552.

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<p> Piezoelectric voltage transformers (PTs) can be used to transform an input voltage into a different, required output voltage needed in electronic and electro- mechanical systems, among other varied uses. On the macro scale, they have been commercialized in electronics powering consumer laptop liquid crystal displays, and compete with an older, more prevalent technology, inductive electromagnetic volt- age transformers (EMTs). The present work investigates PTs on smaller size scales that are currently in the academic research sphere, with an eye towards applications including micro-robotics

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7

Zhu, Zangyuan. "Lead-free piezoelectric ceramics." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581971.

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Legislation arising from health and environmental concerns has intensified research into finding suitable alternatives to lead-based electroceramics. Lead zirconate titanate (PZT) has been developed over several decades to become the market-leading piezoelectric ceramic. Lead-free solid solutions based on sodium potassium niobate, Na0.5K0.5NbO3 (NKN), show promising dielectric and piezoelectric properties. 1-2 The related (l-x)( Na0.5K0.5NbO3)-xBiScO3 binary system (NKN-BS) has been reported to exhibit maximum d33 values of 200 pCIN at 2 mol% BS.3 Similarly, an optimal d33 value has been repor

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8

De, Poumeyrol Benjamin. "Characterization of piezoelectric paint." Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273485.

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9

Hack, Thorsten. "Stick-slip piezoelectric actuators." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624403.

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10

Lai, Ming-Liang. "Developing piezoelectric biosensing methods." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6109/.

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Biosensors are often used to detect biochemical species either in the body or from collected samples with high sensitivity and specificity. Those based on piezoelectric sensing methods employ mechanically induced changes to generate an electrical response. Reliable collection and processing of these signals is an important aspect in the design of these systems. To generate the electrical response, specific recognition layers are arranged on piezoelectric substrates in such a way that they interact with target species and so change the properties of the device surface (e.g. the mass or mechanic

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11

Barthe, Peter Girard. "Analysis of tapered-thickness piezoelectric ceramics for ultrasonic transducers." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/15434.

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12

Giurgea, Constantin. "Precise motion with piezoelectric actuator." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6184.

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The purpose of this study is to determine the displacement performance of a high accuracy-positioning device equipped with three piezo ceramic actuators. The displacement performance of each individual actuator is investigated in order to perform controlled motion over a very small range. A nanometric precision three-degrees of freedom positioner was designed and fabricated. In order to design a proper closed-loop controller, the open loop characteristics of the nanopositioner were experimentally investigated.

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13

Haigh, Richard. "Novel piezoelectric thick film actuators." Thesis, Cranfield University, 2005. http://dspace.lib.cranfield.ac.uk/handle/1826/3814.

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Planar-spiral piezoelectric-unimorph-actuators, that deflect out-of-their-plane, were modelled, designed and fabricated. A range of other planar piezoelectric-device designs has also been made. These include spokes, multi-arms, plates and swastikas. All these devices consisted of a mechanical support in the plane with a piezoelectric layer deposited on top. Impedance spectra demonstrated that a fabricated device was piezoelectrically active. Finite-element (FE) models of straight and spiral piezoelectric- unimorph-actuators were constructed. The mechanical stiffness of the spiral-beam was incr

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14

Kwon, Dongwon. "Piezoelectric kinetic energy-harvesting ics." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47571.

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Wireless micro-sensors can enjoy popularity in biomedical drug-delivery treatments and tire-pressure monitoring systems because they offer in-situ, real-time, non-intrusive processing capabilities. However, miniaturized platforms severely limit the energy of onboard batteries and shorten the lifespan of electronic systems. Ambient energy is an attractive alternative because the energy from light, heat, radio-frequency (RF) radiation, and motion can potentially be used to continuously replenish an exhaustible reservoir. Of these sources, solar light produces the highest power density, except wh

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15

Baker, Daniel William. "Lead-free piezoelectric niobate perovskites." Thesis, University of Warwick, 2010. http://wrap.warwick.ac.uk/3894/.

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The structure and physical properties of the lead-free piezoelectric niobate perovskite material sodium potassium niobate, KxNa1-xNbO3 (KNN) have been investigated via a variety of experimental techniques. High- and low-temperature X-ray and neutron powder diffraction has been performed on polycrystalline samples of KNN. Rietveld refinement has been carried out on data for samples of KNN from x = 0:1 to x = 0:85, with the structure determined for each sample. The phase diagram from x=0:1 to x=1 has been determined, with particular attention paid to the oxygen octahedra tilt systems. The propos

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16

Wu, Zhengbin. "Bondlines in piezoelectric ultrasonic transducers." Thesis, University of the West of Scotland, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427721.

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17

Wright, Darryn John. "New piezoelectric and pyroelectric polymers." Thesis, University of Leeds, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437100.

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18

Sanson, Alessandra. "Modified bismuth titanate piezoelectric ceramics." Thesis, Cranfield University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401625.

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19

Rayner, Philip. "Piezoelectric ultrasonic motors and micromotors." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323890.

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20

Pathak, Shrey. "Piezoelectric microsensors for semiochemical communication." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/57210/.

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Chemical communication plays vital role in the mediating the behaviour of an organism living in the “odour space”. The mechanisms by which odours are generated and detected by the organism has evolved over thousands of years and thus the potential advantages of translating this system into a fully functional communication system has opened new avenues in the area of multi-disciplinary research. This formed the basis of the Biosynthetic Infochemical Communications project – iCHEM whose central aim was to develop a new class of communication technology based on the biosynthesis pathways of the m

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21

Pantzare, Sandra, and Elin Wollert. "Wireless Piezoelectric Horse Sensor System." Thesis, Linköpings universitet, Fysik och elektroteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150152.

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The domestication of horses took place at least 2000 BCE. Since then, horses have been used for transportation, agricultural work and even for warfare. Today, horses have been bred into world athletes, used worldwide in equestrian sports. However, these explosive performance horses present characteristics that make them prone to injuries leading to lameness. According to the insurance company Agria, more than 50 % of all reported injuries on horses in Sweden each year, are related to lameness. Using more objective analysing methods can lead to earlier detection and decrease the occurrence of t

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22

Ely, Kevin Jon. "Piezoelectric effects in GaAs MESFET's." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/40029.

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Gallium arsenide MESFETS require protective passivation at several steps in their fabrication. A common film used for device passivation is silicon nitride. This passivation film is deposited on gallium arsenide substrates by chemical vapor deposition techniques and possesses high intrinsic stress. The stresses arise from the difference in the gallium arsenide and silicon nitride material properties, such as coefficient of expansion, density, modulus, and deposition temperature. The stress has been shown to cause electrical performance shifts in GaAs MESFET structures due to the piezoelectric

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23

Bazilo, C. V., V. M. Zaika, Yu Yu Bondarenko, Yu A. Petrushko, and L. O. Fedoruk. "Piezoelectric Transducers for Ultrasonic Surgery." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65125.

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To enhance the acoustic oscillations it is proposed to place piezoelectric elements on a scalpel in such way to have an angle between the electric field vector of the excitation voltage and the polarization vector.

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24

Anton, Steven Robert. "Multifunctional Piezoelectric Energy Harvesting Concepts." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27388.

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Energy harvesting technology has the ability to create autonomous, self-powered electronic systems that do not rely on battery power for their operation. The term energy harvesting describes the process of converting ambient energy surrounding a system into useful electrical energy through the use of a specific material or transducer. A widely studied form of energy harvesting involves the conversion of mechanical vibration energy into electrical energy using piezoelectric materials, which exhibit electromechanical coupling between the electrical and mechanical domains. Typical piezoelectri

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25

Morvan, Jason. "HIGHLY PIEZOELECTRIC SOFT COMPOSITE FIBERS." Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1334585220.

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26

Xiong, Haocheng. "Piezoelectric Energy Harvesting for Roadways." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51361.

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Energy harvesting technologies have drawn much attention as an alternative power source of roadway accessories in different scales. Piezoelectric energy harvesting consisting of PZT piezoceramic disks sealed in a protective package is developed in this work to harness the deformation energy of pavement induced by traveling vehicles and generate electrical energy. Six energy harvesters are fabricated and installed at the weigh station on I-81 at Troutville, VA to perform on-site evaluation. The electrical performance of the installed harvesters is evaluated by measuring the output voltage and

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27

Zhang, Jin. "Mechanical behaviours of piezoelectric nanostructures." Thesis, Swansea University, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678635.

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The objective of this thesis is to present a modelling and simulation study for the mechanics of PNs with an emphasis placed on the unique features of PNs due to the piezoelectric and small scale effects.

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28

Capobianco, Joseph A. Shih Wan Y. Shih Wei-Heng. "Piezoelectric microcantilever serum protein detector /." Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/2993.

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29

Bing, Yonghong. "Synthesis, structure and properties of high piezo-and ferroelectric complex perovskite systems /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2032.

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30

Mtawa, Alexander Nikwanduka. "Influence of geometry and material properties on the optimum performance of the C-shape piezo-composite actuator." Thesis, Cape Peninsula University of Technology, 2008. http://hdl.handle.net/20.500.11838/1301.

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Thesis (DTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2008<br>In recent years, due to rapid advances in technology there has been an increasingly high demand for large displacement and large force, precise positioning, fast response, low power consuming miniature piezoelectric actuators. In certain smart structure applications, the use of curved piezoelectric actuators is necessary. The present work extends the earlier investigations on the C- shape actuator by providing a detailed investigation on the influence of geometric and material properties of t

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31

Sullivan, Timothy Michael. "Development of a novel method for measuring the transverse piezoelectric coefficients of thin piezoelectric films." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Thesis/Summer2004/t%5Fsullivan%5F072604.pdf.

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32

Shen, Zuyan Shih Wan Y. Shih Wei-Heng. "Synthesis, fabrication, and characterization of self-exciting, self-sensing PZT/SiO2 piezoelectric micro-cantilever sensors /." Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1227.

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33

Stoll, William Allard III. "Nonlinear constitutive behavior of PZT." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17117.

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34

Mika, Bartosz. "Design and testing of piezoelectric sensors." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1565.

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35

Gomis-Bellmunt, Oriol. "Identification and control of piezoelectric actuators." Saarbrücken VDM Verlag Dr. Müller, 2007. http://d-nb.info/988454696/04.

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36

Dickens, Robert A. "Optimization of a piezoelectric acoustical compressor." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/181.

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Thesis (M.S.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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37

Wang, Weijian. "Electrode shape optimization of piezoelectric transducers." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001041.

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38

Lin, Ting-Kuang, and 林廷光. "Research of Dielectrics and Piezoelectrics in Piezoelectric Ceramics." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/97778568764655146235.

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39

Shivashankar, P. "Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4011.

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The use of piezoelectric materials for actuation, and vibration suppression of thin beams, is the subject of study in this doctoral thesis. The initial focus is set on reducing beam vibrations with resistively shunted piezoelectric patches, where the converted electrical energy is dissipated by the resistor to give an additional damping. The amount of additional damping achieved depends on the value of shunted resistor, the dimensions of the piezoelectric, and its location on the substructure. Hence, the resistively shunted piezoelectric-beam was modelled to determine the optimal values, and t

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40

Shivashankar, P. "Analytical Modelling and Non-linear Characterisation of Piezoelectric Materials for Actuation and Vibration Control of Beams." Thesis, 2017. http://etd.iisc.ernet.in/2005/3990.

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The use of piezoelectric materials for actuation, and vibration suppression of thin beams, is the subject of study in this doctoral thesis. The initial focus is set on reducing beam vibrations with resistively shunted piezoelectric patches, where the converted electrical energy is dissipated by the resistor to give an additional damping. The amount of additional damping achieved depends on the value of shunted resistor, the dimensions of the piezoelectric, and its location on the substructure. Hence, the resistively shunted piezoelectric-beam was modelled to determine the optimal values, and t

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41

Chien-Cheng, Chen. "A Thermo-piezoelectric Finite-element Solver for Piezoelectric Transformers." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1807200613280900.

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42

Huang, I.-Ren, and 黃以仁. "Piezoelectric Properties of Cement Piezoelectric Composites with Reactive Powders." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/737gbm.

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碩士<br>國立高雄應用科技大學<br>土木工程與防災科技研究所<br>103<br>0-3 cement-based piezoelectric composite (PP material) consisting of PZT as the inclusion and cement as the binder, with 50% by volume each. While 11.1% and 11.4% of cement were replaced, respectively, by quartz flour and silica fume, the composite is called reactive powders cement piezoelectric composites (PR material). To investigate the effect of silica-based materials, six admixtures: slag, fly ash, glass powder, diatomaceous earth, silicon and silicon carbide were added to PR material to examine its piezoelectric properties. The admixture was a r

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43

Chen, Chien-Cheng, and 陳建誠. "A Thermo-piezoelectric Finite-element Solver for Piezoelectric Transformers." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/05047937446431794167.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>94<br>In this work, we develop a 3-D FEM solver, NTUPZE-T for analyzing piezoelectric transformers. This solver is capable of estimating the device thermal effects. In order to estimate the device temperature distribution when the device operates, we calculate the dissipation of energy based on the internal damping effects. The dissipated energy is considered as the heat source of the heat transfer equation for calculating the temperature distribution of a device. Material constants of piezoelectric materials are usually dependent on temperature. Therefore, a s

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44

Tseng, Wen-Tse, and 曾文澤. "Studies on Piezoelectric Properties of Porous Piezoelectric Ceramic╱Polymer Composites." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/92029441850716683061.

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碩士<br>國立成功大學<br>電機工程研究所<br>83<br>In the underwater sonar system, traditional lead zirconate titanate (PZT) piezoelectric ceramics have been widely used as all kinds of electro-acostical transducers due to their excellent piezoelectricity. However, when PZT ceramics applied in the underwater pressure sensor and hydrophone fields,they become low efficient because their sensitivity will reduce due to the high dielectric constants. In order to improve the efficiency, the composite and porous te

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45

SU, I.-HSUAN, and 蘇逸軒. "Piezoelectric and Electromechanical Properties of Piezoelectric Cement with Quartz Powder." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2n69rc.

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碩士<br>國立高雄應用科技大學<br>土木工程與防災科技研究所<br>105<br>Piezoelectric Cement (Cement Piezoelectric Composites) is a new type of sensor that can be used as the health detection and diagnosis of RC structures. The piezoelectric constants of piezoelectric cement are closely related to their electromechanical properties. Constant piezoelectric cement by the load will have a higher output voltage, in order to create a higher piezoelectric constant piezoelectric cement, the study added the right amount of quartz powder to form a new type of sensor for the quartz powder piezoelectric cement The In this study, the

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46

Yeh, Yu-Chung, and 葉俞均. "Piezoelectric Ceramics Transformer." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/21807343980157655421.

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碩士<br>國立中央大學<br>光電科學研究所<br>92<br>Along with the invention of piezoelectric ceramic, there were many other small-sized but highly efficiency- transformed devices being researched and developed since then. In order to reduce the volume of power supplies and raise its efficiency simultaneously, researchers use piezoelectric transformers made by piezoelectric ceramic to serve their purpose. This thesis focuses in the piezoelectricity of piezoelectric ceramic, how to motivate a piezoelectric transformer, and how to use piezoelectric transformers to drive the backlight source.

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47

Lin, Chih-Ting, and 林致廷. "Redeployment of Piezoelectric Point Sensor by Using Distributed Piezoelectric Sensor Technology." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/01602834485433449821.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>86<br>Point sensors and distributed sensors have both been developed for several decades. The advantages of point sensors as compared to distributed sensors are quite different and both have their own limitations. Based on the linear piezoelectric sensor theory, piezoelectric point sensors and piezoelectric distributed sensors have been developed. A sensor model has been investigated and established. The experimental result to verify the unique characteristics of the piezoele

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48

YOUNG, SHIN WEN, and 楊實文. "Piezoelectric Inkjet Head- Design and Fabrication of Micro Array Piezoelectric Actuator." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/14146311682979223353.

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碩士<br>大葉大學<br>機械工程學系碩士班<br>91<br>With the development of inkjet printing application technology, the inkjet print-head is not only occupying the traditional office printing market, but also making us to focus on it’s application, such as new organic/polymer lighting emitting display, optical communication devices, and MEMS devices, and engine technology etc. In many kinds of inkjet printing technology, the most favor type of inkjet printing technology is the piezoelectric driven printing technology. This study uses finite elements code, ANSYS, to analyze and design an actuator of a

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49

Hung, Sheng-Wei, and 洪聖瑋. "Synchronized Switch Harvesting Using Piezoelectric Oscillators for Piezoelectric Energy Harvesting System." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/u794m8.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>107<br>In order to replace the traditional battery, the concept of energy harvesting has been proposed and attracted widespread attention. Using the micro-piezoelectric transducer for extracting ambient energy is now a popular research topic. The piezoelectric energy harvesting system consists of a piezoelectric transducer, a load device, and interface circuits, which usually includes a rectifier and a DC/DC converter. In general, a full-bridge rectifier is used to convert AC source into DC voltage because it is easy to implement. However, the it has low power

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50

Patterson, Eric Andrew. "Development, characterization, and piezoelectric fatigue behavior of lead-free perovskite piezoelectric ceramics." Thesis, 2012. http://hdl.handle.net/1957/34828.

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Much recent research has focused on the development lead-free perovskite piezoelectrics as environmentally compatible alternatives to lead zirconate titanate (PZT). Two main categories of lead free perovskite piezoelectric ceramic systems were investigated as potential replacements to lead zirconate titanate (PZT) for actuator devices. First, solid solutions based on Li, Ta, and Sb modified (K��.��Na��.��)NbO�� (KNN) lead-free perovskite systems were created using standard solid state methods. Secondly, Bi-based materials a variety of compositions were explored for (1-x)(Bi��.��Na��

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