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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | White, N.M. Harris, N.R. Swee Leong Kok Tudor, M.J. |
| Copyright Year | 2008 |
| Description | Author affiliation: Sch. of Electron. & Comput. Sci., Univ. of Southampton, Southampton (White, N.M.; Harris, N.R.; Swee Leong Kok; Tudor, M.J.) |
| Abstract | Thick-film piezoelectric free-standing structures fabricated with a combination of conventional thick-film technology and a sacrificial layer technique are presented. The structures were fabricated in the form of composite cantilevers, consisting of lead zirconate titanate (PZT) as the functional element and silver/palladium (Ag/Pd) as the electrodes. The cantilevers are free standing above a substrate and are able to operate at low levels of vibration suitable for harvesting energy from the environment. An open circuit output voltage of 130 mV was measured from a sample of length 18 mm, width 9 mm and PZT thickness of 80 mum. The sample was found to produce a maximum output electrical power of 10 nW at its resonant frequency of 237.5 Hz and acceleration level of 0.981 $m/s^{2}$ when driving a 60 kOmega resistive load. The output power was found to increase exponentially with acceleration. At an acceleration of 9.81 $ms^{-2},$ 270 nW of power was produced. The output power can be improved by attaching a proof mass at the tip of the cantilever beam. A beam having a proof mass of 1.14 g, resulted in an eight-fold improvement of output power compared to a device with no added proof mass at the same acceleration level of 0.98 $ms^{-2}.$ |
| Starting Page | 589 |
| Ending Page | 592 |
| File Size | 2134511 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424428137 |
| DOI | 10.1109/ESTC.2008.4684416 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-09-01 |
| Publisher Place | UK |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Electrodes Silver Piezoelectric materials Circuits Voltage Lead Palladium Acceleration Titanium compounds Power generation |
| Content Type | Text |
| Resource Type | Article |
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