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dc.contributor.authorYang, Bin
dc.contributor.authorZhang, Hangfeng
dc.contributor.authorFortes, Dominic
dc.contributor.authorYan, Haixue
dc.contributor.authorAbrahams, Isaac
dc.date.accessioned2020-11-11T12:18:39Z
dc.date.available2020-11-11T12:18:39Z
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/623950/BNT-BST-JMCA-Accepted%2003112020.pdf?sequence=4
dc.identifier.citationH. Zhang, B. Yang, A.D. Fortes, HX. Yan & I. Abrahams. (2020). Structure and dielectric properties of double A-site doped bismuth sodium titanate relaxor ferroelectrics for high power energy storage applications. Journal of Materials Chemistry A, DOI: 10.1039/D0TA07772Ken_US
dc.identifier.urihttp://hdl.handle.net/10034/623950
dc.description.abstractThe structural and dielectric properties of barium/strontium substituted Bi0.5Na0.5TiO3 were examined in compositions of general formula (Ba0.4Sr0.6TiO3)x(Bi0.5Na0.5TiO3)1-x. An average classic cubic perovskite structure is maintained from x = 0.5 to 1.0. The temperature dependence of dielectric properties of studied compositions shows relaxor-ferroelectric behaviour attributed to the existence of polar nano-regions. Ferroelectric measurements under variable temperature demonstrated two transitions from normal ferroelectric to relaxor-ferroelectric and relaxor-ferroelectric to paraelectric, at the dipole freezing temperature, Tf, and temperature of maximum permittivity, Tm, respectively. The obtained value of Tf coincides with the onset of linear thermal expansion of the cubic unit cell parameter obtained from high resolution powder neutron diffraction data. Careful analysis of the neutron diffraction data revealed no significant change in the average cubic structure from -263 to 150 C. However, changes in the Gaussian variance component of the neutron peak shape, reveal three distinct regions with transitions at about -100 and 100 C corresponding to the beginning and end of the dielectric dispersion seen in the permittivity and loss spectra. This variation in the Gaussian variance parameter is attributed to the activity of the polar nano-regions. The composition (Ba0.4Sr0.6)0.5(Bi0.5Na0.5)0.5TiO3 was found to exhibit the maximum recoverable energy storage density, with a value of 1.618 J cm-3 and 76.9% storage efficiency at a field of 17 kV mm-1.en_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.urlhttps://pubs.rsc.org/en/content/articlelanding/2020/ta/d0ta07772k/unauth#!divAbstracten_US
dc.rightsCC0 1.0 Universal*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.titleStructure and dielectric properties of double A-site doped bismuth sodium titanate relaxor ferroelectrics for high power energy storage applicationsen_US
dc.typeArticleen_US
dc.identifier.eissn2050-7496en_US
dc.contributor.departmentUniversity of Chester; Queen Mary University of London; Rutherford Appleton Laboratoryen_US
dc.identifier.journalJournal of Materials Chemistry Aen_US
or.grant.openaccessYesen_US
rioxxterms.funderunfundeden_US
rioxxterms.identifier.projectunfundeden_US
rioxxterms.versionAMen_US
rioxxterms.versionofrecord10.1039/D0TA07772Ken_US
rioxxterms.licenseref.startdate2021-11-09
rioxxterms.publicationdate2020-11-09
dc.dateAccepted2020-11-03
dc.date.deposited11-11-2020en_US
dc.indentifier.issn2050-7488en_US


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