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Development of lead-free materials for piezoelectric energy harvesting

Published online by Cambridge University Press:  22 June 2011

R. Rai ,
I. Coondoo ,
R. P. Lopes ,
I. Bdikin ,
R. Ayouchi ,
S. Bhattacharaya ,
R. Schwarz  and
A. L. Kholkin
R. Rai
Affiliation:
DECV & CICECO, University of Aveiro, Aveiro, Portugal.
I. Coondoo
Affiliation:
DECV & CICECO, University of Aveiro, Aveiro, Portugal.
R. P. Lopes
Affiliation:
DECV & CICECO, University of Aveiro, Aveiro, Portugal.
I. Bdikin
Affiliation:
Centre for Mechanical Technology and Automation, University of Aveiro, Aveiro, Portugal.
R. Ayouchi
Affiliation:
Department of Physics and ICEMS, Instituto Superior Técnico, Lisbon, Portugal.
S. Bhattacharaya
Affiliation:
Department of Physics and ICEMS, Instituto Superior Técnico, Lisbon, Portugal.
R. Schwarz
Affiliation:
Department of Physics and ICEMS, Instituto Superior Técnico, Lisbon, Portugal.
A. L. Kholkin
Affiliation:
DECV & CICECO, University of Aveiro, Aveiro, Portugal.
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Abstract

Mechanical energy harvesting from ambient vibrations is an attractive renewable source of energy for various applications. Prior research was solely based on lead-containing materials which are detrimental to the environment and health. Therefore, lead-free materials are becoming more attractive for harvesting applications. The present work is focused on the development of lead-free piezoelectric materials based on solid solution having composition (KNa)NbO3-xABO3, (where A = Li, and B = Nb; x = 0, 5, 5.5, 6, and 6.5 wt%). The solid solutions of the above ceramics were prepared by using solid-state reaction method. The X-ray diffraction spectra exhibited single phase formation and good crystallinity with LiNbO3 addition up to x = 6.5 wt%. Dielectric studies reveal that the composition with LiNbO3 = 6.5 wt% exhibits superior properties suitable for piezoelectric energy harvesting applications. The nanoscale piezoelectric data obtained with piezoresponse force microscopy provide a direct evidence of strong piezoelectricity with LN doping. The best piezoelectric properties are obtained for the composition K0.5Na0.5NbO3 – 6.5%LiNbO3.

Keywords

piezoelectricsinteringscanning probe microscopy (SPM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1325: Symposium E – Energy Harvesting—Recent Advances in Materials, Devices and Applications , 2011 , mrss11-1325-e06-03
Copyright
Copyright © Materials Research Society 2011

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References

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