Phase transformation of strontium hexagonal ferrite

Autores
Bilovol, Vitaliy; Martinez Garcia, Ricardo
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The phase transformation of strontium hexagonal ferrite (SrFe12O19) to magnetite (Fe3O4) as main phase and strontium carbonate (SrCO3) as secondary phase is reported here. SrFe12O19 powder was obtained by a heat treatment at 250 °C under controlled oxygen flow. It was observed that the phase transformation occurred when the SrFe12O19 ferrite was heated up to 625 °C in confinement conditions. This transformation took place by a combination of three factors: the presence of stresses in the crystal lattice of SrFe12O19 due to a low synthesis temperature, the reduction of Fe3þ to Fe2þ during the heating up to 625 °C, and the similarity of the coordination spheres of the iron atoms present in the S-block of SrFe12O19 and Fe3O4. X-ray diffraction analysis confirmed the existence of strain and crystal deformation in SrFe12O19 and the absence of them in the material after the phase transformation. Dispersive X-ray absorption spectroscopy and Fe57 Mössbauer spectroscopy provided evidences of the reduction of Fe3þ to Fe2þ in the SrFe12O19 crystal.
Fil: Bilovol, Vitaliy. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Tecnologías y Ciencias de la Ingeniería; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina
Fil: Martinez Garcia, Ricardo. Universidad Nacional de Formosa. Facultad de Recursos Naturales. Carrera Ingenieria Civil; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Oxides
Phase Transition
Mössbauer Spectroscopy
X-Ray Diffraction
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/15142
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/15142
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Phase transformation of strontium hexagonal ferriteBilovol, VitaliyMartinez Garcia, RicardoOxidesPhase TransitionMössbauer SpectroscopyX-Ray Diffractionhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2https://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2The phase transformation of strontium hexagonal ferrite (SrFe12O19) to magnetite (Fe3O4) as main phase and strontium carbonate (SrCO3) as secondary phase is reported here. SrFe12O19 powder was obtained by a heat treatment at 250 °C under controlled oxygen flow. It was observed that the phase transformation occurred when the SrFe12O19 ferrite was heated up to 625 °C in confinement conditions. This transformation took place by a combination of three factors: the presence of stresses in the crystal lattice of SrFe12O19 due to a low synthesis temperature, the reduction of Fe3þ to Fe2þ during the heating up to 625 °C, and the similarity of the coordination spheres of the iron atoms present in the S-block of SrFe12O19 and Fe3O4. X-ray diffraction analysis confirmed the existence of strain and crystal deformation in SrFe12O19 and the absence of them in the material after the phase transformation. Dispersive X-ray absorption spectroscopy and Fe57 Mössbauer spectroscopy provided evidences of the reduction of Fe3þ to Fe2þ in the SrFe12O19 crystal.Fil: Bilovol, Vitaliy. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Tecnologías y Ciencias de la Ingeniería; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería; ArgentinaFil: Martinez Garcia, Ricardo. Universidad Nacional de Formosa. Facultad de Recursos Naturales. Carrera Ingenieria Civil; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier2015-07-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/15142Bilovol, Vitaliy; Martinez Garcia, Ricardo; Phase transformation of strontium hexagonal ferrite; Elsevier; Journal Of Physics And Chemistry Of Solids; 86; 7-7-2015; 131-1370022-3697enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jpcs.2015.07.006info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022369715300135info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:33:18Zoai:ri.conicet.gov.ar:11336/15142instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:33:18.753CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Phase transformation of strontium hexagonal ferrite
title Phase transformation of strontium hexagonal ferrite
spellingShingle Phase transformation of strontium hexagonal ferrite
Bilovol, Vitaliy
Oxides
Phase Transition
Mössbauer Spectroscopy
X-Ray Diffraction
title_short Phase transformation of strontium hexagonal ferrite
title_full Phase transformation of strontium hexagonal ferrite
title_fullStr Phase transformation of strontium hexagonal ferrite
title_full_unstemmed Phase transformation of strontium hexagonal ferrite
title_sort Phase transformation of strontium hexagonal ferrite
dc.creator.none.fl_str_mv Bilovol, Vitaliy
Martinez Garcia, Ricardo
author Bilovol, Vitaliy
author_facet Bilovol, Vitaliy
Martinez Garcia, Ricardo
author_role author
author2 Martinez Garcia, Ricardo
author2_role author
dc.subject.none.fl_str_mv Oxides
Phase Transition
Mössbauer Spectroscopy
X-Ray Diffraction
topic Oxides
Phase Transition
Mössbauer Spectroscopy
X-Ray Diffraction
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The phase transformation of strontium hexagonal ferrite (SrFe12O19) to magnetite (Fe3O4) as main phase and strontium carbonate (SrCO3) as secondary phase is reported here. SrFe12O19 powder was obtained by a heat treatment at 250 °C under controlled oxygen flow. It was observed that the phase transformation occurred when the SrFe12O19 ferrite was heated up to 625 °C in confinement conditions. This transformation took place by a combination of three factors: the presence of stresses in the crystal lattice of SrFe12O19 due to a low synthesis temperature, the reduction of Fe3þ to Fe2þ during the heating up to 625 °C, and the similarity of the coordination spheres of the iron atoms present in the S-block of SrFe12O19 and Fe3O4. X-ray diffraction analysis confirmed the existence of strain and crystal deformation in SrFe12O19 and the absence of them in the material after the phase transformation. Dispersive X-ray absorption spectroscopy and Fe57 Mössbauer spectroscopy provided evidences of the reduction of Fe3þ to Fe2þ in the SrFe12O19 crystal.
Fil: Bilovol, Vitaliy. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Tecnologías y Ciencias de la Ingeniería; Argentina. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina
Fil: Martinez Garcia, Ricardo. Universidad Nacional de Formosa. Facultad de Recursos Naturales. Carrera Ingenieria Civil; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The phase transformation of strontium hexagonal ferrite (SrFe12O19) to magnetite (Fe3O4) as main phase and strontium carbonate (SrCO3) as secondary phase is reported here. SrFe12O19 powder was obtained by a heat treatment at 250 °C under controlled oxygen flow. It was observed that the phase transformation occurred when the SrFe12O19 ferrite was heated up to 625 °C in confinement conditions. This transformation took place by a combination of three factors: the presence of stresses in the crystal lattice of SrFe12O19 due to a low synthesis temperature, the reduction of Fe3þ to Fe2þ during the heating up to 625 °C, and the similarity of the coordination spheres of the iron atoms present in the S-block of SrFe12O19 and Fe3O4. X-ray diffraction analysis confirmed the existence of strain and crystal deformation in SrFe12O19 and the absence of them in the material after the phase transformation. Dispersive X-ray absorption spectroscopy and Fe57 Mössbauer spectroscopy provided evidences of the reduction of Fe3þ to Fe2þ in the SrFe12O19 crystal.
publishDate 2015
dc.date.none.fl_str_mv 2015-07-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/15142
Bilovol, Vitaliy; Martinez Garcia, Ricardo; Phase transformation of strontium hexagonal ferrite; Elsevier; Journal Of Physics And Chemistry Of Solids; 86; 7-7-2015; 131-137
0022-3697
url http://hdl.handle.net/11336/15142
identifier_str_mv Bilovol, Vitaliy; Martinez Garcia, Ricardo; Phase transformation of strontium hexagonal ferrite; Elsevier; Journal Of Physics And Chemistry Of Solids; 86; 7-7-2015; 131-137
0022-3697
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jpcs.2015.07.006
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022369715300135
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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