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Anneal-tuned structural, dielectric and electrical properties of ZnFe2O4 nanoparticles synthesized by starch-assisted sol–gel auto-combustion method

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dc.title Anneal-tuned structural, dielectric and electrical properties of ZnFe2O4 nanoparticles synthesized by starch-assisted sol–gel auto-combustion method en
dc.contributor.author Yadav, Raghvendra Singh
dc.contributor.author Havlica, Jaromír
dc.contributor.author Másilko, Jiří
dc.contributor.author Tkacz, Jakub
dc.contributor.author Kuřitka, Ivo
dc.contributor.author Vilčáková, Jarmila
dc.relation.ispartof Journal of Materials Science: Materials in Electronics
dc.identifier.issn 0957-4522 OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.date.issued 2016
utb.relation.volume 27
utb.relation.issue 6
dc.citation.spage 5992
dc.citation.epage 6002
dc.type article
dc.language.iso en
dc.publisher Springer New York LLC
dc.identifier.doi 10.1007/s10854-016-4522-5
dc.relation.uri http://link.springer.com/article/10.1007/s10854-016-4522-5
dc.description.abstract Zinc ferrite nanoparticles have been synthesized by sol–gel auto-combustion method using starch as a fuel. The impact of annealing temperature on crystal structure, microstructure and dielectric properties is investigated. The powder X-ray diffraction results demonstrated the formation of well crystalline single cubic phase of zinc ferrite at annealing temperature 400 °C. Increase in crystallinity, crystallite size and lattice parameter were observed with increase of annealing temperature 600 and 800 °C. Field Emission Scanning Electron Microscopy study revealed that the zinc ferrite nanoparticles annealed at 400 °C were spherical with a particle size range 5–30 nm. These particles annealed at 600 °C were also spherical in morphology with a particle size range 10–50 nm. However, zinc ferrite nanoparticles annealed at 800 °C were polyhedron in morphology with particle size range 15–70 nm. The variations of real and imaginary part of dielectric constant, tan δ and AC conductivity are studied at room temperature. The dielectric spectral analysis demonstrated that the dielectric constant is higher at low frequency and decreases with increase in frequency. This dielectric behavior follows the Maxwell–Wagner interfacial polarization. The dielectric constant and dielectric loss tangent of zinc ferrite nanoparticles exhibit dependence on annealing temperature. The impact of annealing temperature is also analyzed through Modulus spectroscopy and Impedance analysis to understand the interaction between grain and grain boundary in zinc ferrite nanoparticles. © 2016, Springer Science+Business Media New York. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1006375
utb.identifier.obdid 43875170
utb.identifier.scopus 2-s2.0-84964969248
utb.identifier.wok 000377898000068
utb.source j-scopus
dc.date.accessioned 2016-07-26T14:58:21Z
dc.date.available 2016-07-26T14:58:21Z
dc.description.sponsorship Ministry of Education, Youth and Sports of the Czech Republic-Program NPU I [LO1504]; (Ministry of Education, Youth and Sports) at The Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Czech Republic [LO1211]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Yadav, Raghvendra Singh
utb.contributor.internalauthor Kuřitka, Ivo
utb.contributor.internalauthor Vilčáková, Jarmila
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