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

作　　者：Alexander Tkach Olena Okhay 

机构地区：[1]CICECO-Aveiro Institute of Materials,Department of Materials and Ceramic Engineering,University of Aveiro,3810-193,Aveiro,Portugal [2]TEMA-Centre for Mechanical Technology and Automation,Department of Mechanical Engineering,University of Aveiro,3810-193,Aveiro,Portugal [3]LASI-Intelligent Systems Associate Laboratory,4800-058,Guimaraes,Portugal

出　　处：《Journal of Materiomics》2024年第5期1144-1146,共3页无机材料学学报（英文）

基　　金：This work was developed within the scope of the project CICECO-Aveiro Institute of Materials,UIDB/50011/2020(DOI 10.54499/UIDB/50011/2020);UIDP/50011/2020(DOI 10.54499/UIDP/50011/2020)&LA/P/0006/2020(DOI 10.54499/LA/P/0006/2020);financed by national funds through the FCT/MEC(PIDDAC)as well as within FCT independent researcher grant 2021.02284.CEECIND/CP1659/CT0018(DOI 10.54499/2021.02284.CEECIND/CP1659/CT0018);supported by national funds,through FCT in the scope of the framework contract foreseen in numbers 4,5,and 6 of article 23 of the Decree Law 57/2016,of 29 August,UIDB/00481/2020 and UIDP/00481/2020,DOI 10.54499/UIDB/00481/2020 and DOI 10.54499/UIDP/00481/2020;CENTRO-01-0145-FEDER-022083-Centro Portugal Regional Operational Programme(Centro2020),under the PORTUGAL 2020 Partnership Agreement,through the European Regional Development Fund.

摘　　要：SrTi_(2)O_(5) 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 SrTi_(2)O_(5).We also note that the presented dielectric results are contradictory and that many important details are missing.

关 键 词：SrTiO_(3) Dielectric permittivity FERROELECTRICS PIEZOELECTRICS Energy harvesting 

分 类 号：TB33[一般工业技术—材料科学与工程]