Glass–crystalline materials with high iron oxide concentration: Phase composition, redox ratio and magnetic properties Vitrocerámicas con alta concentración de óxido de hierro: Composición de fases, relación redox y propiedades magnéticas

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creativework.keywordsGlass–crystalline materials, Iron oxides, Mössbauer spectroscopy, Vibrating sample magnetometry
creativework.publisherSociedad Espanola de Ceramica y Vidrioen
dc.contributor.authorHarizanova R.
dc.contributor.authorMihailova I.
dc.contributor.authorCherkezova-Zheleva Z.
dc.contributor.authorPaneva D.
dc.contributor.authorGeorgieva M.
dc.contributor.authorTzankov D.
dc.contributor.authorAvdeev G.
dc.contributor.authorRüssel C.
dc.date.accessioned2024-07-10T14:27:06Z
dc.date.accessioned2024-07-10T14:50:40Z
dc.date.available2024-07-10T14:27:06Z
dc.date.available2024-07-10T14:50:40Z
dc.date.issued2024-01-01
dc.description.abstractThe synthesis of glass–crystalline materials in the system Na2O/CaO/SiO2/Fe2O3 with high concentrations of Fe2O3 (20, 25 and 30 mol%) by applying the melt-quenching technique is reported. The melts spontaneously crystallize during pouring and the formation of magnetite (Fe3O4), hematite (α-Fe2O3) and ɛ-Fe2O3, as identified by X-ray diffraction (XRD) is observed. The microstructure and the elemental composition of the prepared materials are further investigated by scanning electron microscopy (SEM) and two different morphological types of Fe-containing crystals – needle-like and dendrite-shaped are detected. Mössbauer spectroscopy showed the presence of Fe3+ and Fe2+, as well as the existence of iron ions both in tetrahedral and octahedral coordination and the precipitation of hematite, ɛ-Fe2O3 and magnetite. The magnetic measurements on the prepared samples reveal ferrimagnetic properties with well defined hysteresis curves, although due to relatively small volume fraction of the iron-rich crystalline phases, the net magnetic moment is quite low compared to the bulk values for magnetite.
dc.identifier.doi10.1016/j.bsecv.2023.04.001
dc.identifier.issn2173-0431
dc.identifier.issn0366-3175
dc.identifier.scopusSCOPUS_ID:85159038574en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/835
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85159038574&origin=inward
dc.titleGlass–crystalline materials with high iron oxide concentration: Phase composition, redox ratio and magnetic properties Vitrocerámicas con alta concentración de óxido de hierro: Composición de fases, relación redox y propiedades magnéticas
dc.typeArticle
oaire.citation.issue1
oaire.citation.volume63
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