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Novel Thick-Film Piezoceramic Micro-Generator Based on Free-Standing Structures

Record type: Conference or Workshop Item (Other)

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 micron. 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/s2 when driving a 60 k? 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.

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Citation

White, N. M., Harris, N. R., Kok, S. L. and Tudor, M. J. (2008) Novel Thick-Film Piezoceramic Micro-Generator Based on Free-Standing Structures At 2nd Electronics System-Integration Technology, United Kingdom. 01 - 04 Sep 2008.

More information

e-pub ahead of print date: 2008
Additional Information: Event Dates: 1 - 4 September 2008
Venue - Dates: 2nd Electronics System-Integration Technology, United Kingdom, 2008-09-01 - 2008-09-04
Organisations: EEE

Identifiers

Local EPrints ID: 266153
URI: http://eprints.soton.ac.uk/id/eprint/266153
PURE UUID: 599a8fbf-8e65-4f49-b7c8-fdc18308b269
ORCID for N. M. White: ORCID iD orcid.org/0000-0003-1532-6452
ORCID for N. R. Harris: ORCID iD orcid.org/0000-0003-4122-2219

Catalogue record

Date deposited: 18 Jul 2008 10:17
Last modified: 18 Jul 2017 07:19

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Contributors

Author: N. M. White ORCID iD
Author: N. R. Harris ORCID iD
Author: S. L. Kok
Author: M. J. Tudor

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