Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling

Autores
Pozo Lopez, Gabriela del Valle; Condo, Adriana Maria; Urreta, Silvia Elena; Silvetti, Silvia Patricia de Guadalupe
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Iron oxide/SiO2 nanocomposites are synthesized by dry ball-milling a mixture of bcc Fe and α-quartz powders for prolonged times. A sequence of nanocomposites is obtained, with small magnetic particles dispersed in a non magnetic, amorphous matrix. The powders are characterized by X-ray diffraction and transmission electron microscopy. The magnetic hysteresis properties are investigated in the range 50-300 K. After 120 h milling, deformed, non-spherical, α-Fe nanocrystallites of about 10 nm in size and very few small (<10 nm) maghemite particles are found. At room temperature, iron particles are ferromagnetic and a large effective magnetic anisotropy is estimated, which is mainly attributed to surface effects. Between 160 and 200 h milling, maghemite nanoparticles are observed while after 220 h grinding, hematite phase appears; after 340 h milling, the sample consists of ferromagnetic hematite particles with a broad size distribution (5-50 nm) embedded in an amorphous matrix.
Fil: Pozo Lopez, Gabriela del Valle. 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. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Condo, Adriana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Urreta, Silvia Elena. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Silvetti, Silvia Patricia de Guadalupe. 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. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Materia
A. COMPOSITES
A. MAGNETIC MATERIALS
A. NANOSTRUCTURES
C. ELECTRON MICROSCOPY
C. X-RAY DIFFRACTION
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:11336/180525
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/180525
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball millingPozo Lopez, Gabriela del ValleCondo, Adriana MariaUrreta, Silvia ElenaSilvetti, Silvia Patricia de GuadalupeA. COMPOSITESA. MAGNETIC MATERIALSA. NANOSTRUCTURESC. ELECTRON MICROSCOPYC. X-RAY DIFFRACTIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Iron oxide/SiO2 nanocomposites are synthesized by dry ball-milling a mixture of bcc Fe and α-quartz powders for prolonged times. A sequence of nanocomposites is obtained, with small magnetic particles dispersed in a non magnetic, amorphous matrix. The powders are characterized by X-ray diffraction and transmission electron microscopy. The magnetic hysteresis properties are investigated in the range 50-300 K. After 120 h milling, deformed, non-spherical, α-Fe nanocrystallites of about 10 nm in size and very few small (<10 nm) maghemite particles are found. At room temperature, iron particles are ferromagnetic and a large effective magnetic anisotropy is estimated, which is mainly attributed to surface effects. Between 160 and 200 h milling, maghemite nanoparticles are observed while after 220 h grinding, hematite phase appears; after 340 h milling, the sample consists of ferromagnetic hematite particles with a broad size distribution (5-50 nm) embedded in an amorphous matrix.Fil: Pozo Lopez, Gabriela del Valle. 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. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaFil: Condo, Adriana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; ArgentinaFil: Urreta, Silvia Elena. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaFil: Silvetti, Silvia Patricia de Guadalupe. 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. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaPergamon-Elsevier Science Ltd2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/180525Pozo Lopez, Gabriela del Valle; Condo, Adriana Maria; Urreta, Silvia Elena; Silvetti, Silvia Patricia de Guadalupe; Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling; Pergamon-Elsevier Science Ltd; Materials Research Bulletin; 49; 1; 1-2014; 237-2440025-5408CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0025540813007423info:eu-repo/semantics/altIdentifier/doi/10.1016/j.materresbull.2013.09.003info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:33Zoai:ri.conicet.gov.ar:11336/180525instacron: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 10:08:34.244CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
title Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
spellingShingle Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
Pozo Lopez, Gabriela del Valle
A. COMPOSITES
A. MAGNETIC MATERIALS
A. NANOSTRUCTURES
C. ELECTRON MICROSCOPY
C. X-RAY DIFFRACTION
title_short Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
title_full Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
title_fullStr Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
title_full_unstemmed Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
title_sort Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling
dc.creator.none.fl_str_mv Pozo Lopez, Gabriela del Valle
Condo, Adriana Maria
Urreta, Silvia Elena
Silvetti, Silvia Patricia de Guadalupe
author Pozo Lopez, Gabriela del Valle
author_facet Pozo Lopez, Gabriela del Valle
Condo, Adriana Maria
Urreta, Silvia Elena
Silvetti, Silvia Patricia de Guadalupe
author_role author
author2 Condo, Adriana Maria
Urreta, Silvia Elena
Silvetti, Silvia Patricia de Guadalupe
author2_role author
author
author
dc.subject.none.fl_str_mv A. COMPOSITES
A. MAGNETIC MATERIALS
A. NANOSTRUCTURES
C. ELECTRON MICROSCOPY
C. X-RAY DIFFRACTION
topic A. COMPOSITES
A. MAGNETIC MATERIALS
A. NANOSTRUCTURES
C. ELECTRON MICROSCOPY
C. X-RAY DIFFRACTION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Iron oxide/SiO2 nanocomposites are synthesized by dry ball-milling a mixture of bcc Fe and α-quartz powders for prolonged times. A sequence of nanocomposites is obtained, with small magnetic particles dispersed in a non magnetic, amorphous matrix. The powders are characterized by X-ray diffraction and transmission electron microscopy. The magnetic hysteresis properties are investigated in the range 50-300 K. After 120 h milling, deformed, non-spherical, α-Fe nanocrystallites of about 10 nm in size and very few small (<10 nm) maghemite particles are found. At room temperature, iron particles are ferromagnetic and a large effective magnetic anisotropy is estimated, which is mainly attributed to surface effects. Between 160 and 200 h milling, maghemite nanoparticles are observed while after 220 h grinding, hematite phase appears; after 340 h milling, the sample consists of ferromagnetic hematite particles with a broad size distribution (5-50 nm) embedded in an amorphous matrix.
Fil: Pozo Lopez, Gabriela del Valle. 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. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Condo, Adriana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Física de Metales; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina
Fil: Urreta, Silvia Elena. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Silvetti, Silvia Patricia de Guadalupe. 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. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
description Iron oxide/SiO2 nanocomposites are synthesized by dry ball-milling a mixture of bcc Fe and α-quartz powders for prolonged times. A sequence of nanocomposites is obtained, with small magnetic particles dispersed in a non magnetic, amorphous matrix. The powders are characterized by X-ray diffraction and transmission electron microscopy. The magnetic hysteresis properties are investigated in the range 50-300 K. After 120 h milling, deformed, non-spherical, α-Fe nanocrystallites of about 10 nm in size and very few small (<10 nm) maghemite particles are found. At room temperature, iron particles are ferromagnetic and a large effective magnetic anisotropy is estimated, which is mainly attributed to surface effects. Between 160 and 200 h milling, maghemite nanoparticles are observed while after 220 h grinding, hematite phase appears; after 340 h milling, the sample consists of ferromagnetic hematite particles with a broad size distribution (5-50 nm) embedded in an amorphous matrix.
publishDate 2014
dc.date.none.fl_str_mv 2014-01
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/11336/180525
Pozo Lopez, Gabriela del Valle; Condo, Adriana Maria; Urreta, Silvia Elena; Silvetti, Silvia Patricia de Guadalupe; Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling; Pergamon-Elsevier Science Ltd; Materials Research Bulletin; 49; 1; 1-2014; 237-244
0025-5408
CONICET Digital
CONICET
url http://hdl.handle.net/11336/180525
identifier_str_mv Pozo Lopez, Gabriela del Valle; Condo, Adriana Maria; Urreta, Silvia Elena; Silvetti, Silvia Patricia de Guadalupe; Synthesis of Fe/SiO2 and iron oxides/SiO2 nanocomposites by long-term ball milling; Pergamon-Elsevier Science Ltd; Materials Research Bulletin; 49; 1; 1-2014; 237-244
0025-5408
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0025540813007423
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.materresbull.2013.09.003
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
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
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
_version_ 1842270049741570048
score 13.13397

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