Vibration energy harvesting and internal electric potential of (Na,K)NbO3/polyimide piezoelectric composites
Yamamoto R, Hegendörfer A, Mergheim J, Kakimoto KI (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 60
Journal Issue: SF
DOI: 10.35848/1347-4065/ac1c3e
Abstract
A composite structure of piezoelectric particles and soft polymer composite materials is a promising component of vibration energy harvesters. However, the energy harvesting behavior which originates from ceramic particles inside the polymer has not been clarified. In this study, (Na,K)NbO3/polyimide composites sheets with NKN fraction of 0-40 vol% were fabricated and open-circuit voltage was measured. The open-circuit voltage was increased nonlinearly from 0.72 to 2.21 V with increasing of the particle fraction (10%-30%) The experimental results were confirmed using a microstructure based finite element method and electric potential and electromechanical coupling coefficients were higher value in the content of 30% NKN particles. Analysis indicates that the internal electric potential inside the matrix under strain could be an important factor for macroscopic piezoelectric constant and electrical output.
Authors with CRIS profile
Andreas Hegendörfer
Lehrstuhl für Technische Mechanik (LTM)
Julia Mergheim
Lehrstuhl für Technische Mechanik (LTM)
Additional Organisation(s)
Involved external institutions
Japan (JP)How to cite
APA:
Yamamoto, R., Hegendörfer, A., Mergheim, J., & Kakimoto, K.-I. (2021). Vibration energy harvesting and internal electric potential of (Na,K)NbO3/polyimide piezoelectric composites. Japanese Journal of Applied Physics, 60(SF). https://doi.org/10.35848/1347-4065/ac1c3e
MLA:
Yamamoto, Ryota, et al. "Vibration energy harvesting and internal electric potential of (Na,K)NbO3/polyimide piezoelectric composites." Japanese Journal of Applied Physics 60.SF (2021).
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