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Author : Peng Zheng
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (144 download)
Download or read book High Temperature Langasite Surface Acoustic Wave Sensors written by Peng Zheng and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Langasite Surface Acoustic Wave Sensors written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the development of harsh-environment surface acoustic wave sensors for wired and wireless operation. Surface acoustic wave devices with an interdigitated transducer emitter and multiple reflectors were fabricated on langasite substrates. Both wired and wireless temperature sensing was demonstrated using radar-mode (pulse) detection. Temperature resolution of better than ±0.5°C was achieved between 200°C and 600°C. Oxygen sensing was achieved by depositing a layer of ZnO on the propagation path. Although the ZnO layer caused additional attenuation of the surface wave, oxygen sensing was accomplished at temperatures up to 700°C. The results indicate that langasite SAW devices are a potential solution for harsh-environment gas and temperature sensing.
Author :
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (925 download)
Download or read book Surface Acoustic Wave Devices for Harsh Environment Wireless Sensing written by and published by . This book was released on 2013 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Langasite surface acoustic wave devices can be used to implement harsh environment wireless sensing of gas concentration and temperature. This paper reviews prior work on the development of langasite surface acoustic wave devices, followed by a report of recent progress toward the implementation of oxygen gas sensors. Resistive metal oxide films can be used as the oxygen sensing film, although development of an adherent barrier layer will be necessary with the sensing layers studied here to prevent interaction with the langasite substrate. Experimental results are presented for the performance of a langasite surface acoustic wave oxygen sensor with tin oxide sensing layer, and these experimental results are correlated with direct measurements of the sensing layer resistivity.
Author : Huankiat Seh
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (68 download)
Download or read book Langasite Bulk Acoustic Wave Resonant Sensor for High Temperature Applications written by Huankiat Seh and published by . This book was released on 2005 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The self consistent defect model established the defect chemistry of langasite, enabling important parameters describing reduction (Er = 5.70± -0.06eV and 6.57±-0.24eV for acceptor and donor doped langasite respectively) and oxidation (Eo = 2.18±0.08eV), intrinsic electron-hole generation (Eg [approx. equals] 4.0-4.4eV) and defect ionization (ED-ion = 52±0.06eV for Nb ionization), to be extracted. The predictive defect model was used to calculate the dependence of the partial ionic and electronic conductivities and mass change as functions of temperature, dopant level and pO2. Given that the magnitudes of conductivity and mass change directly affect the resolution and sensitivity limits of langasite resonators, their predictions allowed for the definition of acceptable operating limits and/or the design of properties for optimum resolution and sensitivity. Two high temperature applications of resonant sensors were studied. Praseodymiumcerium oxide was selected for oxygen partial pressure monitoring and is representative of films which change mass upon absorption or desorption of gaseous species. Barium carbonate film was selected for NO2 sensing and is representative of films which change mass upon reaction with the gas phase to form a new product phase. Both sensors showed sensitivity to their respective target chemicals and demonstrated the feasibility of high temperature sensor applications. The performance of each sensor was discussed and suggestions for improving sensor performance were presented.
Author : Colin Campbell
Publisher : Elsevier
ISBN 13 : 0323148662
Total Pages : 485 pages
Book Rating : 4.3/5 (231 download)
Download or read book Surface Acoustic Wave Devices and Their Signal Processing Applications written by Colin Campbell and published by Elsevier. This book was released on 2012-12-02 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface Acoustic Wave Devices and Their Signal Processing Applications is a textbook that combines experiment and theory in assessing the signal processing applications of surface acoustic wave (SAW) devices. The operating principles of SAW devices are described from a circuit design viewpoint. This book is comprised of 18 chapters and begins with a historical background on surface acoustic waves and a discussion on the merits of SAW devices as well as their applications. The next chapter introduces the reader to the basics of acoustic waves and piezoelectricity, together with the effect of acoustic bulk waves on the performance of SAW filters. The principles of linear phase SAW filter design and equivalent circuit models for a SAW filter are then described. The remaining chapters focus on trade-offs in linear phase SAW filter design; compensation for second-order effects; harmonic SAW delay lines for gigahertz frequencies; and coding techniques using linear SAW transducers. The final chapter highlights Some other significant alternative design techniques and applications for SAW devices. This monograph will be suitable for engineering or physics students as well as engineers, scientists, and technical staff in industry who seek further information on SAW-based circuits, systems, and applications.
Author : Clemens C. W. Ruppel
Publisher : World Scientific
ISBN 13 : 9789812811561
Total Pages : 380 pages
Book Rating : 4.8/5 (115 download)
Download or read book Advances in Surface Acoustic Wave Technology, Systems and Applications written by Clemens C. W. Ruppel and published by World Scientific. This book was released on 2001 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface acoustic wave (SAW) devices are recognized for their versatility and efficiency in controlling and processing electrical signals. This has resulted in a multitude of device concepts for a wide range of signal processing functions, such as delay lines, filters, resonators, pulse compressors, convolvers, and many more. As SAW technology has found its way into mass market products such as TV receivers, pagers, keyless entry systems and cellular phones, the production volume has risen to millions of devices produced every day. At the other end of the scale, these are specialized high performance signal processing SAW devices for satellite communication and military applications, such as radar and electronic warfare. This volume, together with Volume 1, presents an overview of recent advances in SAW technology, systems and applications by some of the foremost researchers in this exciting field. Contents: Coupling-of-Modes Analysis of SAW Devices (V Plessky & J Koskela); Theory and Applications of Green''s Functions (A R Baghai-Wadji); New Piezoelectric Substrates for SAW Devices (J Kosinski); Pseudo and High Velocity Pseudo SAWs (M P da Cunha); SAW Devices Beyond 5 GHz (H Odagawa & K Yamanouchi); Wireless SAW Identification and Sensor Systems (F Schmidt & G Scholl); Interaction of Surface Acoustic Waves, Electrons, and Light (A Wixforth). Readership: Graduate students, researchers and academics in device and circuit design, as well as designers of mobile communications systems.
Download or read book Langasite Surface Acoustic Wave Gas Sensors written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report finite element simulations of the effect of conductive sensing layers on the surface wave velocity of langasite substrates. The simulations include both the mechanical and electrical influences of the conducting sensing layer. We show that three-dimensional simulations are necessary because of the out-of-plane displacements of the commonly used (0, 138.5, 26.7) Euler angle. Measurements of the transducer input admittance in reflective delay-line devices yield a value for the electromechanical coupling coefficient that is in good agreement with the three-dimensional simulations on bare langasite substrate. The input admittance measurements also show evidence of excitation of an additional wave mode and excess loss due to the finger resistance. The results of these simulations and measurements will be useful in the design of surface acoustic wave gas sensors.
Author : Mohd. Nizar Hamidon
Publisher :
ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.:/5 (975 download)
Download or read book Fabrication of high temperature surface acoustic wave devices for sensor applications written by Mohd. Nizar Hamidon and published by . This book was released on 2005 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marco G. Beghi
Publisher : BoD – Books on Demand
ISBN 13 : 9535111892
Total Pages : 616 pages
Book Rating : 4.5/5 (351 download)
Download or read book Modeling and Measurement Methods for Acoustic Waves and for Acoustic Microdevices written by Marco G. Beghi and published by BoD – Books on Demand. This book was released on 2013-08-28 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustics is a mature field which enjoys a never ending youth. New developments are induced by either the search for a better understanding, or by technological innovations. Micro-fabrication techniques introduced a whole new class of microdevices, which exploit acoustic waves for various tasks, and in particular for information processing and for sensing purposes. Performance improvements are achievable by better modelling tools, able to deal with more complex configurations, and by more refined techniques of fabrication and of integration in technological systems, like wireless communications. Several chapters of this book deal with modelling and fabrication techniques for microdevices, including unconventional phenomena and configurations. But this is far from exhausting the research lines in acoustics. Theoretical analyses and modelling techniques are presented, for phenomena ranging from the detection of cracks to the acoustics of the oceans. Measurement methods are also discussed, which probe by acoustic waves the properties of widely different systems.
Author : Claus-Dieter Kohl
Publisher : Springer
ISBN 13 : 364254519X
Total Pages : 348 pages
Book Rating : 4.6/5 (425 download)
Download or read book Gas Sensing Fundamentals written by Claus-Dieter Kohl and published by Springer. This book was released on 2014-08-18 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume, which addresses various basic sensor principles, covers micro gravimetric sensors, semiconducting and nano tube sensors, calorimetric sensors and optical sensors. Furthermore, the authors discuss recent developments in the related sensitive layers including new properties of nano structured metal oxide layers. They provide in-depth insights into the unique chemistry and signal generation of copper oxide in percolating sensors and present a variety of applications of functional polymers made possible by proper imprinting. Highlights of the subjects covered include: • requirements for high-temperature sensors • carbon nano tube sensors • new sensing model for nanostructured In2O3 • bio mimetic approach for semiconductor sensor-based systems • optical readout for inorganic and organic semiconductor sensors • concept of virtual multisensors to improve specificity and selectivity • calorimetric sensors for hydrogen peroxide detection • percolation effect-based sensors to implement dosimeters • imprinted polymer layers for bulk and surface acoustic wave sensors
Author : I︠U︡riĭ Sergeevich Kuzʹminov
Publisher : Cambridge Int Science Publishing
ISBN 13 : 1898326304
Total Pages : 137 pages
Book Rating : 4.8/5 (983 download)
Download or read book Lithium Niobate Crystals written by I︠U︡riĭ Sergeevich Kuzʹminov and published by Cambridge Int Science Publishing. This book was released on 1999 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lithium niobate crystals have a number of unique properties. Lithium niobate is at the same time a ferroelectric, piezoelectric, pyroelectric, and has high nonlinearly optical and electro-optical coefficients and photorefractive sensitivity. These properties enable these crystals to be used widely in optical and acoustic devices, and photorefractive sensitivity, enhanced by doping with transitional metals, offers new possibilities of using lithium niobate as a recording holographic medium. These properties are determined by the crystal structure of lithium niobate sensitive to physical and chemical effects. Special attention is given in the book to physico-chemical features of technology, disruption of stoichiometry in these crystals and detection of this disruption by physical methods. At the same time, the ideas and methods proposed in the book can be used in technology of other crystals.
Author : IEEE Staff
Publisher :
ISBN 13 : 9781665439367
Total Pages : pages
Book Rating : 4.4/5 (393 download)
Download or read book 2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF IFCS) written by IEEE Staff and published by . This book was released on 2021-07-07 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This event marks joint meeting of IEEE IFCS and EFTF to combine the two leading international technical conferences for research, development and applications of timing and frequency control The conference program encompasses all traditional topics, to include resonators, oscillators, atomic standards, optical frquency standards, timekeeping, and resonant sensors, with a noticeable increase in contributions from MEMS technologists
Author : Armando Emilio Ayes Moncada
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (114 download)
Download or read book Development and Test of High Temperature Surface Acoustic Wave Gas Sensors written by Armando Emilio Ayes Moncada and published by . This book was released on 2020 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yoseph Bar-Cohen
Publisher : CRC Press
ISBN 13 : 1466566450
Total Pages : 586 pages
Book Rating : 4.4/5 (665 download)
Download or read book High Temperature Materials and Mechanisms written by Yoseph Bar-Cohen and published by CRC Press. This book was released on 2014-03-03 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of high-temperature materials in current and future applications, including silicone materials for handling hot foods and metal alloys for developing high-speed aircraft and spacecraft systems, has generated a growing interest in high-temperature technologies. High Temperature Materials and Mechanisms explores a broad range of issues related to high-temperature materials and mechanisms that operate in harsh conditions. While some applications involve the use of materials at high temperatures, others require materials processed at high temperatures for use at room temperature. High-temperature materials must also be resistant to related causes of damage, such as oxidation and corrosion, which are accelerated with increased temperatures. This book examines high-temperature materials and mechanisms from many angles. It covers the topics of processes, materials characterization methods, and the nondestructive evaluation and health monitoring of high-temperature materials and structures. It describes the application of high temperature materials to actuators and sensors, sensor design challenges, as well as various high temperature materials and mechanisms applications and challenges. Utilizing the knowledge of experts in the field, the book considers the multidisciplinary nature of high temperature materials and mechanisms, and covers technology related to several areas including energy, space, aerospace, electronics, and metallurgy. Supplies extensive references at the end of each chapter to enhance further study Addresses related science and engineering disciplines Includes information on drills, actuators, sensors and more A comprehensive resource of information consolidated in one book, this text greatly benefits students in materials science, aerospace and mechanical engineering, and physics. It is also an ideal resource for professionals in the industry.
Author : Oliver A Williams
Publisher : Royal Society of Chemistry
ISBN 13 : 1849737614
Total Pages : 553 pages
Book Rating : 4.8/5 (497 download)
Download or read book Nanodiamond written by Oliver A Williams and published by Royal Society of Chemistry. This book was released on 2014-03-18 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exceptional mechanical, optical, surface and biocompatibility properties of nanodiamond have gained it much interest. Exhibiting the outstanding bulk properties of diamond at the nanoscale in the form of a film or small particle makes it an inexpensive alternative for many applications. Nanodiamond is the first comprehensive book on the subject. The book reviews the state of the art of nanodiamond films and particles covering the fundamentals of growth, purification and spectroscopy and some of its diverse applications such as MEMS, drug delivery and biomarkers and biosensing. Specific chapters include the theory of nanodiamond, diamond nucleation, low temperature growth, diamond nanowires, electrochemistry of nanodiamond, nanodiamond flexible implants, and cell labelling with nanodiamond particles. Edited by a leading expert in nanodiamonds, this is the perfect resource for those new to, and active in, nanodiamond research and those interested in its applications.
Author : Tao-Lun Darren Chin
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (144 download)
Download or read book High Temperature Wireless Surface Acoustic Wave Gas Sensors Using ZnO and SnO2 Thin Films written by Tao-Lun Darren Chin and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M Aliofkhazraei
Publisher : Elsevier
ISBN 13 : 0857092170
Total Pages : 627 pages
Book Rating : 4.8/5 (57 download)
Download or read book Anti-Abrasive Nanocoatings written by M Aliofkhazraei and published by Elsevier. This book was released on 2014-12-09 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of the fabrication methods for anti-abrasive nanocoatings. The connections among fabrication parameters, the characteristics of nanocoatings and the resulting properties (i.e. nanohardness, toughness, wear rate, load-bearing ability, friction coefficient, and scratch resistance) are discussed. Size-affected mechanical properties of nanocoatings are examined, including their uses. Anti-abrasive nanocoatings, including metallic-, ceramic-, and polymeric-based layers, as well as different kinds of nanostructures, such as multi-layered nanocomposites and thin films, are reviewed. Provides a comprehensive overview of the fabrication methods for anti-abrasive nanocoatings Discusses the connections among fabrication parameters, the characteristics of nanocoatings and the resulting properties Reviews advantages and drawbacks of fabrication methods for anti-abrasive nanocoatings and clarifies the place of these nanocoatings in the world of nanotechnology
