Lam, K.H. , Lin, D.M., Ni, Y.Q. and Chan, H.L.W. (2009) Lead-free piezoelectric KNN-based pin transducers for structural monitoring applications. Structural Health Monitoring, 8(4), pp. 283-289. (doi: 10.1177/1475921708102146)
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Abstract
A 2.4 mm diameter piezoelectric ceramic disc was used to construct a spring-loaded pin-type transducer for intelligent monitoring of systems. Two types of lead-free KNN-based ceramics (0.95K0.5Na0.5 (Nb0.94Sb0.06)O 3 — 0.05LiTaO3 + 1.25 mol% BaO and K0.5Na 0.5NbO3 -0.75 mol% K5.4Cu1.3Ta 10O29) were selected as a sensing element of the pin. The piezoelectric spring-loaded pins were mounted on the corners of the aluminum plate for the performance evaluation using a laser ultrasonic technique. The signals detected by transducers with different sensing elements including lead-based ceramics have been compared. The capability of impact detection of the lead-free transducers was shown to be comparable to that of the lead-based one. It is envisaged that lead-free piezoelectrics will become the important transducer materials in the next generation nondestructive evaluation technology.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | Lam, K.H., Lin, D.M., Ni, Y.Q., and Chan, H.L.W. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Structural Health Monitoring |
| Publisher: | SAGE |
| ISSN: | 1475-9217 |
| ISSN (Online): | 1741-3168 |
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