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PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and hydrocarbons. PVDF has low density 1.78 g/cm 3 in comparison to other fluoropolymers, like polytetrafluoroethylene. It is available in the form of piping products, sheet, tubing, films, plate and an insulator for premium wire.
First reported in 1971, ferroelectric polymers are polymer chains that must exhibit ferroelectric behavior, [4] hence piezoelectric [3] and pyroelectric behavior. [3]A ferroelectric polymer must contain permanent electrical polarization that can be reversed repeatedly, by an opposing electric field. [4]
Piezoelectric polymers (PVDF, 240 mV-m/N) possess higher piezoelectric stress constants (g 33), an important parameter in sensors, than ceramics (PZT, 11 mV-m/N), which show that they can be better sensors than ceramics. Moreover, piezoelectric polymeric sensors and actuators, due to their processing flexibility, can be readily manufactured ...
Piezoelectric micromachined ultrasonic transducers (PMUT) are MEMS-based piezoelectric ultrasonic transducers.Unlike bulk piezoelectric transducers which use the thickness-mode motion of a plate of piezoelectric ceramic such as PZT or single-crystal PMN-PT, PMUT are based on the flexural motion of a thin membrane coupled with a thin piezoelectric film, such as PVDF.
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Convicted Delphi, Indiana, killer Richard Allen was sentenced on Friday to 130 years in prison for the 2017 murders of two teenage girls as the victims' families spoke out in court. Allen, wearing ...
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