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dc.creatorZdujić, Miodrag
dc.creatorPoleti, Dejan
dc.creatorJovalekić, Čedomir
dc.creatorKaranović, Ljiljana
dc.date.accessioned2017-06-10T15:45:07Z
dc.date.issued2009
dc.identifier.issn0352-5139
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/174
dc.description.abstractA powder mixture of α-Bi2O3 and HfO2, in the molar ratio 2:3, was mechanochemically treated in a planetary ball mill under air, using zirconium oxide vials and balls as the milling medium. After 50 h of milling, the mechanochemical reaction led to the formation of a nanocrystalline δ-Bi2O3 phase (fluorite-type solid solution Bi0.78Hf0.59Zr0.63O3.61), with a crystallite size of 20 nm. The mechanochemical reaction started at a very beginning of milling accompanied by an accumulation of ZrO2 arising from the milling tools. The samples prepared after various milling times were characterized by X-ray powder diffraction and DSC analysis. The electrical properties of the as-milled and pressed Bi0.78Hf0.59Zr0.63O3.61 powder were studied using impedance spectroscopy in the temperature range from 100 to 700°C under air. The electrical conductivity was determined to be 9.43×10-6 and 0.080 S cm-1 for the temperatures of 300 and 700°C, respectively.en
dc.description.abstractSmeša prahova α-Bi2O3 i HfO2 u molarnom odnosu 2:3 mehanohemijski je tretirana u planetarnom mlinu u atmosferi vazduha, koristeći cirkonijumske posude i kuglice kao medijum za mlevenje. Posle 50 h mlevenja, mehanohemijska reakcija dovodi do stvaranja nanokristalne δ-Bi2O3 faze (čvrsti rastvor fluoritske strukture Bi0,78Hf0,59Zr0,63O3,61), veličine kristalita 20 nm. Mehanohemijska reakcija otpočinje u samom početku mlevenja i praćena je akumulacijum ZrO2 koji potiče od medijuma za mlevenje. Uzorci dobijeni posle različitih vremena mlevenja karakterisani su rendgenskom strukturnom i termijskom analizom. Električna svojstva mlevenih i presovanih Bi0,78Hf0,59Zr0,63O3,61 prahova ispitivana su impedansnom spektroskopijom u temperaturnom opsegu od 100 do 700°C. Dobijena električna provodnost je 9,43·10-6 i 0,080 S cm-1 za temperaturu 300 i 700°C, redom.sr
dc.format74 12 (2009) 1401-1411
dc.formatapplication/pdf
dc.languageen
dc.publisherBelgrade : Serbian Chemical Society
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/142030/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/141027/RS//
dc.rightsopenAccess
dc.sourceJournal of the Serbian Chemical Societyen
dc.subjectbismuth(III) oxide
dc.subjectX-ray diffraction
dc.subjectelectrical conductivity
dc.subjectfuel cells
dc.subjectbizmut(III) oksid
dc.titleMechanochemical synthesis and electrical conductivity of nanocrystalline δ-Bi2O3 stabilized by HfO2 and ZrO2en
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractПолети, Дејан; Јовалекић, Чедомир; Здујић, Миодраг; Карановић, Љиљана;
dc.citation.spage1401
dc.citation.epage1411
dc.citation.volume74
dc.citation.issue12
dc.identifier.wos000275494600006
dc.identifier.doi10.2298/JSC0912401Z
dc.identifier.scopus2-s2.0-77349118499
dc.type.versionpublishedVersion
dc.identifier.fulltexthttp://dais.sanu.ac.rs/bitstream/id/20011/171.pdf


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