Onanuga, O., Fenu, N. , Fotouhi, S. and Lucas, M. (2023) Characterisation of a Lead-free Piezoceramic for Application in Power Ultrasonic Transducers. 17th International Conference on Advances in Experimental Mechanics, Glasgow University Union, University of Glasgow, UK, 30 August 2023 - 01 September 2023.
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Abstract
A lead-free piezoceramic, sodium bismuth titanate (NBT), was characterised to obtain all the independent elastic, piezoelectric and dielectric (EPD) properties, and as a piezoceramic with C∞/6mm symmetry, the EPD matrix is populated by five elastic, three piezoelectric and two dielectric coefficients. Being a new material, the complete EPD matrix is required for transducer design, however, due to poling challenges only three of the four resonant mode samples were available for the IEEE characterisation technique. The IEEE technique was combined with the Levenberg–Marquardt (LM) optimisation algorithm to determine the ten EPD coefficients, by using impedance magnitude data from a miniature sample, and EPD values from the IEEE technique as input for the LM algorithm. The piezoelectric and dielectric values determined by both techniques are in strong agreement with each other and with the data available in the literature.
| Item Type: | Conference or Workshop Item |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Fotouhi, Dr Sakineh and Fenu, Dr Nicola and Lucas, Professor Margaret and Onanuga, Olubunmi |
| Authors: | Onanuga, O., Fenu, N., Fotouhi, S., and Lucas, M. |
| College/School: | College of Science and Engineering College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Research Group: | Centre for Medical and Industrial Ultrasonics (C-MIU) |
| Related URLs: |
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