Lam, K.H. , Sun, C.L., Chan, H.L.W., Zhao, X.Z. and Choy, C.L. (2007) A piezoelectric-metal-cavity (PMC) actuator. Journal of Electroceramics, 18, pp. 251-253. (doi: 10.1007/s10832-007-9067-9)
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Abstract
A novel piezoelectric-metal-cavity (PMC) actuator has been designed to exhibit a large flexural displacement. This PMC actuator consists of a metal ring sandwiched between two identical piezoelectric unimorphs. The radial contraction of the piezoelectric ceramic is converted into flextensional motion of the unimorph, causing a large flexural displacement in the centre part of the actuator. The metal cavity acts a function of circumferential coupling of the piezoelectric unimorphs. It was found that the effective piezoelectric charge coefficient of the PMC actuator can approach 40,000 pC/N. With its high piezoelectric and electromechanical coupling coefficients, the PMC actuator gives a static displacement 16 μm can be produced under a d.c. driving voltage of ±77 V.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | Lam, K.H., Sun, C.L., Chan, H.L.W., Zhao, X.Z., and Choy, C.L. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Journal of Electroceramics |
| Publisher: | Springer |
| ISSN: | 1385-3449 |
| ISSN (Online): | 1573-8663 |
| Related URLs: |
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