Development of Lead-free Piezoelectric Ceramic Resonators for High-frequency Oscillator Applications - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Development of Lead-free Piezoelectric Ceramic Resonators for High-frequency Oscillator Applications write by Ho-yan Wong. This book was released on 2009. Development of Lead-free Piezoelectric Ceramic Resonators for High-frequency Oscillator Applications available in PDF, EPUB and Kindle. 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.
Development of Lead-Free (Na0.5K0.5)NbO3-Based Piezoelectric Ceramics with High Mechanical Quality Factor and Their Applications on Piezoelectric Transformers
Development of Lead-Free (Na0.5K0.5)NbO3-Based Piezoelectric Ceramics with High Mechanical Quality Factor and Their Applications on Piezoelectric Transformers - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Development of Lead-Free (Na0.5K0.5)NbO3-Based Piezoelectric Ceramics with High Mechanical Quality Factor and Their Applications on Piezoelectric Transformers write by 楊松齡. This book was released on 2013. Development of Lead-Free (Na0.5K0.5)NbO3-Based Piezoelectric Ceramics with High Mechanical Quality Factor and Their Applications on Piezoelectric Transformers available in PDF, EPUB and Kindle.
Piezoelectric Ceramic Resonators
Piezoelectric Ceramic Resonators - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Piezoelectric Ceramic Resonators write by Jiří Erhart. This book was released on 2016-10-24. Piezoelectric Ceramic Resonators available in PDF, EPUB and Kindle. 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.
Piezoelectric Ceramics
Piezoelectric Ceramics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Piezoelectric Ceramics write by . This book was released on 1996. Piezoelectric Ceramics available in PDF, EPUB and Kindle.
Lead-free Piezo-Ceramic Solid Solutions
Lead-free Piezo-Ceramic Solid Solutions - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Lead-free Piezo-Ceramic Solid Solutions write by R. Saravanan. This book was released on 2018-11-25. Lead-free Piezo-Ceramic Solid Solutions available in PDF, EPUB and Kindle. Discover in this book the results of a systematic investigation of the dielectric, ferroelectric and piezoelectric properties of promising lead-free solid solution ceramics. Lead-based perovskite ceramics are most important for piezoelectric and ferroelectric devices, but the toxicity of lead has raised serious environmental issues. This is why much research presently is concerned with the development of efficient lead-free systems. Lead-free ceramics with the most promising piezoelectric properties are based on barium titanate, modified sodium potassium niobate, sodium bismuth titanate, etc. The present book presents the results of a systematic investigation of the dielectric, ferroelectric and piezoelectric properties of this type of lead-free solid solution ceramics as obtained by way of powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, UV-visible spectroscopy, dielectric, ferroelectric and piezoelectric measurements. Also determined was the electron density distribution of five series of lead-free barium titanate piezoelectric ceramics using experimental X-ray diffraction data.
