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Low cost, large area, lightweight, stretchable ferroelectrets have been fabricated by using commercially available irradiation cross-linked polypropylene (IXPP) foam sheets. Quasi-static piezoelectric d33 coefficients up to 400 pC/N are achieved, which are pressure independent in the range of applied pressure from 1 to 36 kPa. The piezoelectric performance in such IXPP films is well retained for the...
Reliability issues associated with thermal-humidity and vapor pressure have become increasingly significant for electronic devices. With the more density of electronic packaging and the trend of lead-free material application, materials of electronic packaging will experience more harsh stress and thermal environment. Therefore, it is significant to investigate failure mechanism of materials applied...
Ferroelectrets are charged polymer foams with piezoelectric effects, developed around two decades ago. Compared with ceramic piezoelectric materials, ferroelectrets have many advantages, such as flexible, light weight, low acoustic impendence, and so on, indicating a lot of potential applications. Through developing corresponding circuits, this paper provides some interesting and innovative devices,...
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