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dc.creatorKosanović, Darko
dc.creatorBlagojević, Vladimir A.
dc.creatorMaričić, Aleksa
dc.creatorAleksić, S.
dc.creatorPavlović, Vera P.
dc.creatorPavlović, Vladimir B.
dc.creatorVlahović, Branislav
dc.date.accessioned2018-09-06T08:43:23Z
dc.date.available2018-09-06T08:43:23Z
dc.date.issued2018
dc.identifier.issn0272-8842
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/3742
dc.description.abstractBarium hexaferrite ceramics were prepared using mechanically activated mixtures of iron and barium titanate. The 60:40 mass% Fe:BaTiO3 powder mixtures were mechanically activated for different times (100–240 min) and sintered at 1100 and 1200 °C in order to determine the influence of mechanical activation of the precursor on the magnetic and dielectric properties of the resulting barium hexaferrite ceramics. The final product contained 84–89 mass% of Ba2Fe22.46O38Ti1.54 phase, with higher content corresponding to longer mechanical activation of the precursor. XRD and Raman measurements indicated that the remainder of the sample consists of leftover BaTiO3 and hematite, which was formed by the oxidation of iron during mechanical activation and sintering in air. Magnetic properties of samples sintered at 1200 °C are superior to those sintered at 1100 °C, which can be attributed to higher Ba2Fe22.46O38Ti1.54 phase content. The position of the Curie temperature in 350–420 °C temperature region is consistent with 0.8:1 ratio of Ti to Ba. Maximum magnetization was observed for samples activated for 120 min. Dielectric properties of samples sintered at 1200 °C showed a dependence on frequency, with a significant drop in relative permittivity with an increase in frequency in the low-frequency region, and relatively constant values of relative permittivity in the high-frequency region. The tangent loss showed a decrease with increase in frequency, where peaks corresponding to the resonance of the electron hopping frequency with the external field were observed in the samples corresponding to the longer mechanical activation. Dielectric properties showed relatively small changes for samples activated longer than 150 min. © 2018 Elsevier Ltd and Techna Group S.r.l.
dc.publisherElsevier
dc.relationUnited States National Aeronautics and Space Administration (NASA), Grant NNX09AV07A
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172057/RS//
dc.relationSerbian Academy of Sciences and Arts, Project F-178
dc.relationUnited States National Science Foundation (NSF) / Centers of Research Excellence in Science and Technology (CREST), Grant HRD-0833184
dc.relationUnited States National Science Foundation (NSF) / Partnerships for Research and Education in Materials (PREM), Grant 1523617
dc.rightsrestrictedAccess
dc.sourceCeramics International
dc.subjectmilling
dc.subjectsintering
dc.subjectelectrical properties
dc.subjectmagnetic properties
dc.titleInfluence of mechanical activation on functional properties of barium hexaferrite ceramics
dc.typearticleen
dc.rights.licenseARR
dcterms.abstractВлаховић, Б.; Aлексић, С.; Косановић, Дарко; Благојевић, Владимир A.; Маричић, Aлекса; Павловић, Вера П.; Павловић, Владимир Б.;
dc.citation.spage6666
dc.citation.epage6672
dc.citation.volume44
dc.citation.issue6
dc.identifier.wos000427215100114
dc.identifier.doi10.1016/j.ceramint.2018.01.078
dc.identifier.scopus2-s2.0-85041099081
dc.description.otherSupporting information: [http://dais.sanu.ac.rs/123456789/3788]
dc.type.versionpublishedVersion


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