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dc.creatorMatović, Branko
dc.creatorMaletaškić, Jelena
dc.creatorBučevac, Dušan
dc.creatorZagorac, Jelena B.
dc.creatorFajar, Muhammad
dc.creatorYoshida, Katsumi
dc.creatorYano, Toyohiko
dc.date.accessioned2018-09-17T08:37:26Z
dc.date.available2018-09-17T08:37:26Z
dc.date.issued2018
dc.identifier.issn0272-8842 (print)
dc.identifier.issn1873-3956 (electronic)
dc.identifier.urihttps://linkinghub.elsevier.com/retrieve/pii/S0272884218315827
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/7817
dc.description.abstractPyrochlore compound (Gd2Hf2O7) powder was prepared by reacting gadolinium nitrate and hafnium chloride with NaOH during solid state displacement reaction at low temperature (SSDR). The SSDR process at room temperature initially yielded amorphous powders, which crystallized after subsequent calcination to form crystalline ceramics. The formation of crystalline Gd2Hf2O7took place at temperature as low as 600 °C. The phase evolution with thermal treatment as well as powder properties such as crystallite size, lattice strain and lattice parameter were studied by X-ray powder diffraction (XRPD) at room temperature. High-density ceramic pellets free of any additives were obtained after compaction of the obtained powders and subsequent sintering at 1600 °C for 4 h in air. Rietveld analysis of X-ray diffraction (XRD) pattern of sintered sample showed that the unit cell parameter of the obtained Gd2Hf2O7is 10.5501 (2) Å with x value = 0.345(2) in Wyckoff positions, indicating small distortion of octahedra. Hardness of the sintered samples was found to be 7.1 GPa. The thermal conductivity measurements performed in temperature range from room temperature to 1000 °C showed that thermal diffusivity of sintered samples was between 0.5 and 1 mm2/s whereas thermal conductivity was between 4 and 7 W/(m K).
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45012/RS//
dc.relationLaboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology (2-12-1- N1-29)
dc.rightsrestrictedAccess
dc.sourceCeramics International
dc.subjectpyrochloreen
dc.subjectGd2Hf2O7en
dc.subjectlow-temperature synthesisen
dc.subjectphase evolutionen
dc.subjectsinterabilityen
dc.subjectthermal conductivityen
dc.titleSynthesis, characterization and sintering of Gd2Hf2O7 powders synthesized by solid state displacement reaction at low temperatureen
dc.typearticleen
dc.rights.licenseARR
dcterms.abstractБуцевац, Дусан; Фајар, Мухаммад; Матовиц, Бранко; Загорац, Јелена; Yосхида, Катсуми; Yано, Тоyохико; Малетаскиц, Јелена;
dc.rights.holder© 2018 Elsevier Ltd and Techna Group S.r.l.
dc.citation.volume44
dc.citation.issue14
dc.citation.spage16972
dc.citation.epage16976
dc.identifier.wos000442714100108
dc.identifier.doi10.1016/j.ceramint.2018.06.138
dc.type.versionpublishedVersion
dc.identifier.scopus2-s2.0-85048929718


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