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dc.creatorPaunović, Vesna
dc.creatorMitić, Vojislav V.
dc.creatorKocić, Ljubiša
dc.date.accessioned2018-01-30T10:09:12Z
dc.date.available2018-01-30T10:09:12Z
dc.date.issued2016
dc.identifier.issn0272-8842
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/15998
dc.description.abstractSm/Mn codoped BaTiO3 ceramics were investigated for their microstructure and dielectric characteristics. The powders were prepared by the conventional solid state procedure. The concentration of Sm2O3 as a donor dopant has been kept from 0.1 up to 5.0 at%. The content of MnO2 as acceptor was kept constant at 0.05 at% Mn in all samples. The specimens were sintered at 1290 °C, 1320 °C and 1350 °C in an air atmosphere for two hours. A mainly uniform and homogeneous microstructure with average grain size ranging from 0.3 µm to 2.0 µm was observed in low doped samples. In highly doped samples, apart from the fine grained matrix, the appearance of local area with secondary abnormal grains was observed. The dielectric properties were investigated as a function of frequency and temperature. The low doped samples exhibit the high value of dielectric permittivity at room temperature and the greatest change at the Curie temperature. The highest value of dielectric constant (εr=6800) was measured for 0.1Sm/BaTiO3 samples sintered at 1350 °C. A nearly flat permittivity-temperature response and lower values of εr were obtained in specimens with 2.0 and 5.0 at% additive content. The dielectric constant increases with the increase of sintering temperature. The dissipation factor ranged from 0.01 to 0.22 and decreases with the increase of sintering temperature. The Curie constant (C), Curie-Weiss temperature (T0) and critical exponent of nonlinearity (γ ) were calculated using a Curie-Weiss and modified Curie-Weiss law. The highest value of Curie constant (C=9.06·105 K) was measured in 0.1 at% doped samples. The Curie constant decreased with increasing dopant content. The γ values, ranging from 1.001 to 1.58, point out the sharp phase transition in low doped samples, and the diffuse phase transition in heavily doped BaTiO3 samples.eng
dc.format42 10 (2016) 11692-11699
dc.languageen
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172057/RS//
dc.rightsrestrictedAccess
dc.sourceCeramics Internationaleng
dc.subjectSintering
dc.subjectMicrostructure
dc.subjectdielectric properties
dc.subjectBarium titanate
dc.titleDielectric characteristics of donor-acceptor modified BaTiO3 ceramicseng
dc.typearticle
dc.rights.licenseARR
dcterms.abstractПауновић, Весна; Митић, Војислав В.; Коцић, Љубиша; Диелецтриц цхарацтеристицс оф донор-аццептор модифиед БаТиО3 церамицс;
dc.citation.spage11692
dc.citation.epage11699
dc.citation.volume42
dc.citation.issue10
dc.identifier.doi10.1016/j.ceramint.2016.04.087
dc.identifier.scopus2-s2.0-84992307430
dc.type.versionpublishedVersion
dc.identifier.fulltexthttp://dais.sanu.ac.rs/bitstream/handle/123456789/15998/paper1280-1947.pdf


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