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Discussion | Open Access

Comment on “Ferroelectric composite-based piezoelectric energy harvester for self-powered detection of obstructive sleep”

Alexander Tkacha,,( ), Olena Okhayb,c
CICECO - Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193, Aveiro, Portugal
TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193, Aveiro, Portugal
LASI - Intelligent Systems Associate Laboratory, 4800-058, Guimaraes, Portugal

DOI of original article: https://doi.org/10.1016/j.jmat.2023.01.002.

Peer review under responsibility of The Chinese Ceramic Society.

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Abstract

SrTi2O5 particles were claimed by Panda et al. in J. Materiomics 2023; 9:609 as a new lead-free ferroelectric material with orthorhombic symmetry and space group of Cmm2, being, therefore, employed as a base of piezoelectric energy harvesters. However, in this comment we express concerns regarding the presence of the piezoelectricity in the studied material and the interpretation of the structural, microstructural, and ferroelectric results in that publication as those associated with SrTi2O5. We also note that the presented dielectric results are contradictory and that many important details are missing.

Keywords

Energy harvestingFerroelectricsPiezoelectricsSrTiO3Dielectric permittivity

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Journal of Materiomics
Volume 10 Issue 5,
September 2024
Pages 1144-1146
DOI: 10.1016/j.jmat.2024.05.003
Cite this article:
Tkach A, Okhay O. Comment on “Ferroelectric composite-based piezoelectric energy harvester for self-powered detection of obstructive sleep”. Journal of Materiomics, 2024, 10(5): 1144-1146. https://doi.org/10.1016/j.jmat.2024.05.003

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Received: 26 November 2023
Revised: 30 December 2023
Accepted: 29 May 2024
Published: 01 June 2024
© 2024 The Authors.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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