Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures

Autores
Botta, Pablo Martín; Ramos, Cinthia Paula; Bercoff, Paula Gabriela; Botta, Pablo Martín; Porto Lopez, Jose Manuel
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The mechanochemical activation of Ti/Fe2O3 powder mixtures with molar ratio 1 and 1.5 was performed with the aim of understanding the effects of the starting composition on the reactivity and structure of the produced phases. The solid mixture was characterized by scanning electron microscopy, X-ray diffraction, vibrating sample magnetometry and Mössbauer spectroscopy. The consumption of the reactants and the formation of metallic iron are observed at short activation times. After 3 h, the redox reaction completes, yielding a composite powder formed by nanocrystalline Fe particles dispersed in an oxide matrix. The mixture with the highest Ti/Fe ratio leads to the formation of a TiO2 matrix, whereas the other composition forms FeTiO3. Both composite materials have very high saturation magnetization and moderate coercivities. Under subsequent thermal treatment at 700 °C, the activated solids show a progressive crystalline ordering with partial oxidation of Fe (mainly to FeTiO3 and Fe2O3) and crystallization into the rutile phase of TiO2. This leads to a significant decrease of magnetization and coercivity.
Fil: Botta, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Ramos, Cinthia Paula. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bercoff, Paula Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Botta, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Porto Lopez, Jose Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Materia
COMPOSITE MATERIALS
MÖSSBAUER SPECTROSCOPY
MAGNETOMETER
MAGNETIC PROPERTIES
MECHANOCHEMISTRY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/245796
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/245796
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixturesBotta, Pablo MartínRamos, Cinthia PaulaBercoff, Paula GabrielaBotta, Pablo MartínPorto Lopez, Jose ManuelCOMPOSITE MATERIALSMÖSSBAUER SPECTROSCOPYMAGNETOMETERMAGNETIC PROPERTIESMECHANOCHEMISTRYhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The mechanochemical activation of Ti/Fe2O3 powder mixtures with molar ratio 1 and 1.5 was performed with the aim of understanding the effects of the starting composition on the reactivity and structure of the produced phases. The solid mixture was characterized by scanning electron microscopy, X-ray diffraction, vibrating sample magnetometry and Mössbauer spectroscopy. The consumption of the reactants and the formation of metallic iron are observed at short activation times. After 3 h, the redox reaction completes, yielding a composite powder formed by nanocrystalline Fe particles dispersed in an oxide matrix. The mixture with the highest Ti/Fe ratio leads to the formation of a TiO2 matrix, whereas the other composition forms FeTiO3. Both composite materials have very high saturation magnetization and moderate coercivities. Under subsequent thermal treatment at 700 °C, the activated solids show a progressive crystalline ordering with partial oxidation of Fe (mainly to FeTiO3 and Fe2O3) and crystallization into the rutile phase of TiO2. This leads to a significant decrease of magnetization and coercivity.Fil: Botta, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Ramos, Cinthia Paula. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bercoff, Paula Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; ArgentinaFil: Botta, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Porto Lopez, Jose Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaElsevier Science SA2012-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/245796Botta, Pablo Martín; Ramos, Cinthia Paula; Bercoff, Paula Gabriela; Botta, Pablo Martín; Porto Lopez, Jose Manuel; Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures; Elsevier Science SA; Materials Chemistry and Physics; 133; 2-3; 4-2012; 971-9760254-0584CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058412001514info:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2012.01.125info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:33Zoai:ri.conicet.gov.ar:11336/245796instacron: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:34982025-09-03 09:45:33.629CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
title Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
spellingShingle Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
Botta, Pablo Martín
COMPOSITE MATERIALS
MÖSSBAUER SPECTROSCOPY
MAGNETOMETER
MAGNETIC PROPERTIES
MECHANOCHEMISTRY
title_short Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
title_full Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
title_fullStr Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
title_full_unstemmed Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
title_sort Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures
dc.creator.none.fl_str_mv Botta, Pablo Martín
Ramos, Cinthia Paula
Bercoff, Paula Gabriela
Botta, Pablo Martín
Porto Lopez, Jose Manuel
author Botta, Pablo Martín
author_facet Botta, Pablo Martín
Ramos, Cinthia Paula
Bercoff, Paula Gabriela
Porto Lopez, Jose Manuel
author_role author
author2 Ramos, Cinthia Paula
Bercoff, Paula Gabriela
Porto Lopez, Jose Manuel
author2_role author
author
author
dc.subject.none.fl_str_mv COMPOSITE MATERIALS
MÖSSBAUER SPECTROSCOPY
MAGNETOMETER
MAGNETIC PROPERTIES
MECHANOCHEMISTRY
topic COMPOSITE MATERIALS
MÖSSBAUER SPECTROSCOPY
MAGNETOMETER
MAGNETIC PROPERTIES
MECHANOCHEMISTRY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The mechanochemical activation of Ti/Fe2O3 powder mixtures with molar ratio 1 and 1.5 was performed with the aim of understanding the effects of the starting composition on the reactivity and structure of the produced phases. The solid mixture was characterized by scanning electron microscopy, X-ray diffraction, vibrating sample magnetometry and Mössbauer spectroscopy. The consumption of the reactants and the formation of metallic iron are observed at short activation times. After 3 h, the redox reaction completes, yielding a composite powder formed by nanocrystalline Fe particles dispersed in an oxide matrix. The mixture with the highest Ti/Fe ratio leads to the formation of a TiO2 matrix, whereas the other composition forms FeTiO3. Both composite materials have very high saturation magnetization and moderate coercivities. Under subsequent thermal treatment at 700 °C, the activated solids show a progressive crystalline ordering with partial oxidation of Fe (mainly to FeTiO3 and Fe2O3) and crystallization into the rutile phase of TiO2. This leads to a significant decrease of magnetization and coercivity.
Fil: Botta, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Ramos, Cinthia Paula. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Bercoff, Paula Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina
Fil: Botta, Pablo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Porto Lopez, Jose Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
description The mechanochemical activation of Ti/Fe2O3 powder mixtures with molar ratio 1 and 1.5 was performed with the aim of understanding the effects of the starting composition on the reactivity and structure of the produced phases. The solid mixture was characterized by scanning electron microscopy, X-ray diffraction, vibrating sample magnetometry and Mössbauer spectroscopy. The consumption of the reactants and the formation of metallic iron are observed at short activation times. After 3 h, the redox reaction completes, yielding a composite powder formed by nanocrystalline Fe particles dispersed in an oxide matrix. The mixture with the highest Ti/Fe ratio leads to the formation of a TiO2 matrix, whereas the other composition forms FeTiO3. Both composite materials have very high saturation magnetization and moderate coercivities. Under subsequent thermal treatment at 700 °C, the activated solids show a progressive crystalline ordering with partial oxidation of Fe (mainly to FeTiO3 and Fe2O3) and crystallization into the rutile phase of TiO2. This leads to a significant decrease of magnetization and coercivity.
publishDate 2012
dc.date.none.fl_str_mv 2012-04
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/11336/245796
Botta, Pablo Martín; Ramos, Cinthia Paula; Bercoff, Paula Gabriela; Botta, Pablo Martín; Porto Lopez, Jose Manuel; Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures; Elsevier Science SA; Materials Chemistry and Physics; 133; 2-3; 4-2012; 971-976
0254-0584
CONICET Digital
CONICET
url http://hdl.handle.net/11336/245796
identifier_str_mv Botta, Pablo Martín; Ramos, Cinthia Paula; Bercoff, Paula Gabriela; Botta, Pablo Martín; Porto Lopez, Jose Manuel; Effects of the Ti/Fe ratio on the phase composition and magnetic properties of mechanochemically activated Ti–Fe2O3 mixtures; Elsevier Science SA; Materials Chemistry and Physics; 133; 2-3; 4-2012; 971-976
0254-0584
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058412001514
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2012.01.125
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science SA
publisher.none.fl_str_mv Elsevier Science SA
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 13.13397

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