Piezoelectric Ceramic Resonators
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Piezoelectric Ceramic Resonators
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Author : Jiří Erhart
language : en
Publisher: Springer
Release Date : 2016-10-24
Piezoelectric Ceramic Resonators written by Jiří Erhart and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-24 with Technology & Engineering categories.
This book helps the reader to understand the specific properties of piezoelectric ceramic resonators. It provides their theoretical description by immitance and equivalent circuit method. The nummerical modelling described is accompanied by examples of properties measured experimentally. Piezoelectric ceramic transformers are also covered, followed by a series of solved and unsolved problems prepared specially for students.
Development Of Lead Free Piezoelectric Ceramic Resonators For High Frequency Oscillator Applications
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Author : Ho-yan Wong
language : en
Publisher:
Release Date : 2009
Development Of Lead Free Piezoelectric Ceramic Resonators For High Frequency Oscillator Applications written by Ho-yan Wong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Oscillators, Electric categories.
Because of the good piezoelectric properties and low sintering temperature, CBT-Cu/Ba-0.30 and MBT-Cu/Ba-0.40 have been used to fabricate high-frequency double-layered ceramic resonators. The resonator has a pair of top and bottom electrodes and an inner electrode in between them; all of them are of the same dimensions (2 mm and 3 mm in diameter) and smaller than the lateral dimension of the resonator (~5.4mm {604} 4.5 mm). As the sintering temperature for CBT-Cu/Ba-0.30 and MBT-Cu/Ba-0.40 are below 1000°C, Ag70/Pd30 inner electrode, instead of Pt, can be used for cofiring with the ceramics, and hence there is a great saving in the production cost. Our results reveal that the spurious vibrations of the resonators have been successfully suppressed. This should be party due to the smaller electrodes which is one of the typical approaches in the energy trapping technique to confine the vibrations in the electroded region and hence to reduce the standing waves formed by the reflected waves from the sample edge. This should also partly due to the second harmonic thickness extension mode vibrations. Our results also reveal that although the MBT-Cu/Ba-0.4 ceramic has better piezoelectric properties, its performance as a resonator is not as good as CBT-Cu/Ba-0.30. For the CBT-Cu/Ba-0.30 double-layered resonator, it has a relatively "clean" resonance response and a lower temperature coefficient of frequency (TCF =-39.3 ppm/°C). It also has a relatively low impedance at resonance (14 and 30] for 3-mm and 2-mm electrodes, respectively), which is very close to the value for a commercially available PZT resonator. These suggest that the CBT-Cu/Ba-0.30 lead-free double-layered resonators have good potential to replace the lead-based resonators.
Practical Application Of Simulation Technique For The Resonators Using Piezoelectric Ceramics
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Author : Jeong-Ho Cho
language : en
Publisher:
Release Date : 2008
Practical Application Of Simulation Technique For The Resonators Using Piezoelectric Ceramics written by Jeong-Ho Cho and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
The ceramic manufacturing process is so complicated and process-dependent, that achieving reproducibility is very hard in many cases. Especially, ceramic resonator is smaller than other piezoelectric ceramics applications and more precise process control is needed. Therefore, understanding configuration design and tendency through simulation is very useful to avoid unnecessary effort. In recent trend, as piezoelectric ceramics is used in the various actuators and sensors, the use of simulation in this field is also increasing. Some of actuator, sensor or acoustic applications may have a complicated shape depending on the purposes, however, basic simulation process was regarded as same as resonator. Therefore, the accuracy of simulation depends on the accuracy of the knowledge on the material constants of piezoelectrics.
Piezoelectric Ceramics
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Author : J. Van Randeraat
language : en
Publisher: Gower Publishing Company, Limited
Release Date : 1974
Piezoelectric Ceramics written by J. Van Randeraat and has been published by Gower Publishing Company, Limited this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Science categories.
Electrical Measurements Of Ferroelectric Ceramic Resonators
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Author :
language : en
Publisher:
Release Date : 1996
Electrical Measurements Of Ferroelectric Ceramic Resonators written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Future uses of modern ferroelectrics include thin film resonant microstructures for timimg, sensing, and actuation. The frequency range of interest extends from nearly DC through the UHF band. At high frequencies especially, it is difficult to obtain precise material parameters from broadband electrical measurements. We have developed highly accurate lumped equivalent networks for these frequencies, for the two canonical cases of thickness and lateral field excitation. Measurements on these circuits permit extraction of the complex dielectric, piezoelectric, and elastic parameters of the material. In this report we discuss both traditional and modern electrical network descriptions of piezoelectric resonators; we also treat how they are modified by the conditions of excitation and inclusion of loss mechanisms. The more general networks are then specialized to yield lumped circuit versions tailored to the particular attributes of ferroelectrics: high coupling and moderate loss. A numerical example is worked by means of illustration.
Piezoelectric Resonators And Their Applications
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Author : Jiří Zelenka
language : en
Publisher: North-Holland
Release Date : 1986
Piezoelectric Resonators And Their Applications written by Jiří Zelenka and has been published by North-Holland this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Technology & Engineering categories.
Piezoelectric resonators rank among the traditional electronic components that have been used for many years in radioelectrics, time-keeping and, more recently, in microprocessor-based devices. Their ever-increasing range of application has been made possible by gradual improvements in the basic resonator parameters. This book is a compendium of studies on bulk-wave vibrating piezoelectric resonators. First published in Czech in 1983, this English edition has been adapted to include the latest concepts and developments. Important elastic, dielectric and piezoelectric parameters of piezoelectric resonators are reviewed, and basic characteristics of modern piezoelectric crystals and piezoceramic materials derived. In the section on vibration theory, the equations of motion and their solutions are presented; the resonant frequency equations of the flexural, length extensional and torsional modes of vibrations of the bars and the thickness vibrations of the plates are derived. Approximate methods of calculation for contoured rectangular plates are also considered. The electrical equivalent circuit of piezoelectric resonator is then derived for various shapes of bars and plates. The properties of the electrical equivalent circuit are described with regard to the influence of the temperature and the non-linear properties of piezoelectric crystals. The methods of measurement of resonant frequency and dynamic capacitance are presented and related to the equivalent electrical circuit of piezoelectric resonators. One part of the book is devoted to basic types of piezoelectric quartz, LiNbO3 and LiTaO3 resonators. Special attention is given to the possibility of adjusting the resonant frequency/temperature characteristics by selecting a suitable orientation angle and dimension ratio of the resonator plate. A brief description of multi-resonator structures is included. Production technology and comments on resonator applications in wave filters and crystal oscillators are also discussed. The book is intended for engineers in research and development departments in plants producing piezoelectric resonators, as well as for those who utilize piezoelectric units in various electronic and measuring devices. University and postgraduate students may find it a useful source of information in a number of electrotechnical and electronic studies.
Piezoelectric Mems Resonators
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Author : Harmeet Bhugra
language : en
Publisher: Springer
Release Date : 2017-01-09
Piezoelectric Mems Resonators written by Harmeet Bhugra and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-09 with Technology & Engineering categories.
This book introduces piezoelectric microelectromechanical (pMEMS) resonators to a broad audience by reviewing design techniques including use of finite element modeling, testing and qualification of resonators, and fabrication and large scale manufacturing techniques to help inspire future research and entrepreneurial activities in pMEMS. The authors discuss the most exciting developments in the area of materials and devices for the making of piezoelectric MEMS resonators, and offer direct examples of the technical challenges that need to be overcome in order to commercialize these types of devices. Some of the topics covered include: Widely-used piezoelectric materials, as well as materials in which there is emerging interest Principle of operation and design approaches for the making of flexural, contour-mode, thickness-mode, and shear-mode piezoelectric resonators, and examples of practical implementation of these devices Large scale manufacturing approaches, with a focus on the practical aspects associated with testing and qualification Examples of commercialization paths for piezoelectric MEMS resonators in the timing and the filter markets ...and more! The authors present industry and academic perspectives, making this book ideal for engineers, graduate students, and researchers.
Piezoelectric Materials
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Author : Toshio Ogawa
language : en
Publisher: BoD – Books on Demand
Release Date : 2016-08-24
Piezoelectric Materials written by Toshio Ogawa and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-24 with Technology & Engineering categories.
The science and technology in the area of piezoelectric ceramics are extremely progressing, especially the materials research, measurement technique, theory and applications, and furthermore, demanded to fit social technical requests such as environmental problems. While they had been concentrated on piezoelectric ceramics composed of lead-containing compositions, such as lead zirconate titanate (PZT) and lead titanate, at the beginning because of the high piezoelectricity, recently lead water pollution by soluble PZT of our environment must be considered. Therefore, different new compositions of lead-free ceramics in order to replace PZT are needed. Until now, there have been many studies on lead-free ceramics looking for new morphotropic phase boundaries, ceramic microstructure control to realize high ceramic density, including composites and texture developments, and applications to new evaluation techniques to search for high piezoelectricity. The purpose of this book is focused on the latest reports in piezoelectric materials such as lead-free ceramics, single crystals, and thin films from viewpoints of piezoelectric materials, piezoelectric science, and piezoelectric applications.
Discrete Oscillator Design
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Author : Randall W. Rhea
language : en
Publisher: Artech House
Release Date : 2014-05-14
Discrete Oscillator Design written by Randall W. Rhea and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-14 with Technology & Engineering categories.
Oscillators are an essential part of all spread spectrum, RF, and wireless systems, and todayOCOs engineers in the field need to have a firm grasp on how they are designed. Presenting an easy-to-understand, unified view of the subject, this authoritative resource covers the practical design of high-frequency oscillators with lumped, distributed, dielectric and piezoelectric resonators. Including numerous examples, the book details important linear, nonlinear harmonic balance, transient and noise analysis techniques. Moreover, the book shows you how to apply these techniques to a wide range of oscillators. You gain the knowledge needed to create unique designs that elegantly match your specification needs. Over 360 illustrations and more than 330 equations support key topics throughout the book.
Antiplane Motions Of Piezoceramics And Acoustic Wave Devices
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Author : Jiashi Yang
language : en
Publisher: World Scientific
Release Date : 2010
Antiplane Motions Of Piezoceramics And Acoustic Wave Devices written by Jiashi Yang and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Science categories.
This book focuses on dynamic antiplane problems of piezoelectric ceramics. It presents relatively simple theoretical solutions to many such problems, and attempts to use these solutions to demonstrate the operation and design of several acoustic wave devices. Some of the solutions are able to show the underlying physics clearly without the need for numerical computation. The problems treated include the propagation of plate waves, surface waves, interface waves, Love waves, gap waves, and vibrations of finite bodies of various shapes with applications in resonators, mass sensors, fluid sensors, interface sensors, phononic crystals, piezoelectric generators or power harvesters, piezoelectric transformers, power or signal transmission through an elastic wall, and acoustic wave excitation and detection for nondestructive evaluation.