Piezoelectric KNN ceramic for energy harvesting from mechanochemically activated precursors

In this study, a high quality Na 0.52 K 0.435 Li 0.045 Nb 0.905 Ta 0.05 Sb 0.045 O 3 (LS45-H) ceramic has been prepared from mechanochemically activated LS45 powder and normal sintering in air, which is promising for use in lead-free piezoelectric energy harvester. Herein, the LS45-H ceramic not onl...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2018-06, Vol.29 (11), p.9582-9587
Main Authors: Zheng, Mupeng, Hou, Yudong, Chao, Lumen, Zhu, Mankang
Format: Article
Language:English
Subjects:
Activated sintering
Ceramic powders
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electric fields
Energy
Energy consumption
Energy harvesting
Grain growth
Hot pressing
Lead content
Lead free
Materials Science
Optical and Electronic Materials
Piezoelectricity
Plasma sintering
Remote sensors
Wireless sensor networks
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Summary:In this study, a high quality Na 0.52 K 0.435 Li 0.045 Nb 0.905 Ta 0.05 Sb 0.045 O 3 (LS45-H) ceramic has been prepared from mechanochemically activated LS45 powder and normal sintering in air, which is promising for use in lead-free piezoelectric energy harvester. Herein, the LS45-H ceramic not only has less defect structure, but also has a more uniform and denser microstructure. Furthermore, the LS45-H ceramic exhibits excellent energy harvesting performance in the mode of cantilever-type structure, and a high output power of 11.5 µW and output voltage of 5 V were obtained at the acceleration of 10 m/s 2 . This work provides a simple method for preparing dense, uniform KNN ceramics without abnormal grain growth, and we believed that the LS45-H ceramic has a potential application in piezoelectric energy harvester for self-powered sources of wireless sensor network systems.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-8993-4