Results 301 to 310 of about 62,079 (347)
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Piezoelectricity in polymer electrets
Journal of Applied Physics, 1982The model of Mopsik and Broadhurst for piezoelectricity in polymer electrets is reconsidered and further developed. The main features of the model are reviewed with particular attention directed to tensorial aspects of the piezoelectric effect. A characteristic difference is pointed out in the patterns of piezoelectric response attributed to two ...
J. Strathdee, W. H. Robinson
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Screen printable polymer piezoelectrics
Sensor Review, 2000The use of polymer thick‐film technology for the implementation of piezoelectric sensors opens up the way towards the low‐cost production of piezoelectric sensing devices. A novel polymer thick‐film piezoelectric paste is presented and compared with other piezoelectric materials.
Thomas Papakostas, Neil White
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Materials & Design, 1988
Abstract Piezoelectricity and pyroelectricity, traditionally encountered in single crystals and ceramics, have now been documented in a number of polymers. The most successful and widely used polymer is polyvinylidene fluoride (PVF 2 ) which has been shown to be ferroelectric.
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Abstract Piezoelectricity and pyroelectricity, traditionally encountered in single crystals and ceramics, have now been documented in a number of polymers. The most successful and widely used polymer is polyvinylidene fluoride (PVF 2 ) which has been shown to be ferroelectric.
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Japanese Journal of Applied Physics, 1998
Four kinds of piezoelectric polymers are introduced. Submicron thin films of polyurea are prepared by vapor deposition polymerization. Poled films of aromatic polyurea exhibit the piezoelectric constant d 31=20 pC/N, which is almost independent of temperature in the range of 100 to 200°C. Aliphatic polyureas show a
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Four kinds of piezoelectric polymers are introduced. Submicron thin films of polyurea are prepared by vapor deposition polymerization. Poled films of aromatic polyurea exhibit the piezoelectric constant d 31=20 pC/N, which is almost independent of temperature in the range of 100 to 200°C. Aliphatic polyureas show a
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Sensor Review, 2001
PVDF piezo polymers are new, valuable materials for sensing and actuating applications. These materials are strong candidates for new sensors that cannot be realised with piezoceramics or single crystals. The combination of the mechanical properties of a plastic material with those of a piezoelectric material led to new sensors and transducers whose ...
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PVDF piezo polymers are new, valuable materials for sensing and actuating applications. These materials are strong candidates for new sensors that cannot be realised with piezoceramics or single crystals. The combination of the mechanical properties of a plastic material with those of a piezoelectric material led to new sensors and transducers whose ...
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Piezoelectric properties of biological polymers
Quarterly Reviews of Biophysics, 1983Piezoelectricity and pyroelectricity in wool and hair were observed by Martin early in 1941. The piezoelectric effect in wood was investigated in detail by Bazhenov (1961). Both converse and direct effect of shear piezoelectricity in wood was demonstrated by Fukada (1955). Bending piezoelectricity in bone was first discovered by Yasuda (1953).
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Polymer Piezoelectric Tubular Transducers
Electrochemical and Solid-State Letters, 2007Piezoelectric tubular transducers are key components for microactuating devices such as ultrasonic motors and devices utilizing piezoceramics outperform their electromagnetic counterparts at miniaturized scales. Incorporating piezoelectric polymers allows the benefits of increased strain and energy density but their use in tubular transducers in ...
Nathaniel Ng, J. Ma, F. Boey
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Piezoelectric Polymer PVDF Microactuators
2008Microactuators are one of the most important components in microelectromechanical systems (MEMS). The simplest and earliest actuating elements are microcantilevers. In the late 1980s, microactuators received increasing attention when electrostatically driven micromotors started to appear.
Fu, Yao +2 more
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Piezoelectric polymer pressure sensors
Sensors and Actuators, 1987Abstract The use of the piezoelectric material polyvinylidene fluoride (PVdF) in sensors to measure underwater shock wave pressures is described. Its advantages and disadvantages as a sensor material are compared to those of conventional tourmaline sensors.
P. Leaver, M.J. Cunningham, B.E. Jones
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Wide-band piezoelectric polymer acoustic sources
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1988The design of a wideband acoustic source made of the piezoelectric polymer polyvinylidine fluoride (PVDF) is described. The source was developed for the characterization and absolute calibration of ultrasonic hydrophone probes. Construction details are described and performance characteristics of the wideband PVDF transmitter, including its ...
P A, Lewin, M E, Schafer
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