MP21 - Lead-Free Piezoelectric Vibration Energy Harvesters: Spark Plasma Sintered KNN compared with commercial KNN
- Event
- EUROSENSORS XXXVII
2025-09-07 - 2025-09-10
Wroclaw - Band
- Poster I
- Chapter
- Energy Harvesting for Sensors
- Author(s)
- G. Forges, N. Bencharef, H. Debéda - Univ. Bordeaux, Talence Cedex (France), U. -C. Chung, C. Elissalde - Univ. Bordeaux, Pessac (France), D. Gibus - Univ. Savoie Mont Blanc, Annecy (France)
- Pages
- 244 - 245
- DOI
- 10.5162/EUROSENSORS2025/MP21
- ISBN
- 978-3-910600-07-2
- Price
- free
Abstract
This work presents the use of lead-free piezoelectric material, pure KNN sintered by spark plasma sin-tering, for applications in vibration energy harvesting. KNN ceramics of dimensions 1 × 2 × 8 mm3 were densified at 10⁰⁰°C and thinned to 0.5mm before electromechanical characterizations. The deduced parameters were used for the design of piezoelectric bimorph cantilever. A power of 115 µW at 1m/s² and a normalized power of 6.75 μW. g−2. mm−3 are expected from FEM simulations. Such results are similar as those of commercial KNN ceramics, showing the potentialities of the process.