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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/15142
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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 Técnicas2025-09-29T10:35:43Zoai: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:34982025-09-29 10:35:43.716CONICET 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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