Abstract
A 2.4mm 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)O3- 0.05LiTaO3+ 1.25 mol% BaO and K0.5Na0.5NbO3-0.75 mol% K5.4Cu1.3Ta10O29) 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.
| Original language | English |
|---|---|
| Pages (from-to) | 283-289 |
| Number of pages | 7 |
| Journal | Structural Health Monitoring |
| Volume | 8 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Jul 2009 |
Keywords
- Lead-free ceramics
- Pin transducer
- Structural monitoring
ASJC Scopus subject areas
- Biophysics
- Mechanical Engineering