Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes
- Autores
- Gardey Merino, María Celeste; Lascalea, Gustavo Enrique; Sánchez, Laura M.; Vazquez, Patricia Graciela; Cabanillas, Edgardo Domingo; Lamas, Diego Germán
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In this work, two new gel-combustion routes for the synthesis of Al2O3 nanopowders with aspartic acid as fuel are presented. The first route is a conventional stoichiometric process, while the second one is a non-stoichiometric, pH-controlled process. These routes were compared with similar synthesis procedures using glycine as fuel, which are well-known in the literature. The samples were calcined in air at different temperatures, in a range of 600-1200 °C. They were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and BET specific surface area. Different phases were obtained depending on the calcination temperature: amorphous, γ (metastable) or α (stable). The amorphous-to-γ transition was found for calcination temperatures in the range of 700-900 °C, while the γ-to-α one was observed for calcination temperatures of 1100-1200 °C. The retention of the metastable γ phase is probably due to a crystallite size effect. It transforms to the α phase after the crystallite size increases over a critical size during the calcination process at 1200 °C. The highest BET specific surface areas were obtained for both nitrate-aspartic acid routes proposed in this work, reaching values of about 50 m2/g. © 2009 Elsevier B.V. All rights reserved.
Fil: Gardey Merino, María Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; Argentina. Universidad Tecnológica Nacional; Argentina
Fil: Lascalea, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; Argentina
Fil: Sánchez, Laura M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; Argentina
Fil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Cabanillas, Edgardo Domingo. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lamas, Diego Germán. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; Argentina - Materia
-
Nanostructured Materials
Oxide Materials
X-Ray Diffraction - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/77473
Ver los metadatos del registro completo
id |
CONICETDig_d35233a1fc24d89bff17c67b83d1b9c5 |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/77473 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routesGardey Merino, María CelesteLascalea, Gustavo EnriqueSánchez, Laura M.Vazquez, Patricia GracielaCabanillas, Edgardo DomingoLamas, Diego GermánNanostructured MaterialsOxide MaterialsX-Ray Diffractionhttps://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2In this work, two new gel-combustion routes for the synthesis of Al2O3 nanopowders with aspartic acid as fuel are presented. The first route is a conventional stoichiometric process, while the second one is a non-stoichiometric, pH-controlled process. These routes were compared with similar synthesis procedures using glycine as fuel, which are well-known in the literature. The samples were calcined in air at different temperatures, in a range of 600-1200 °C. They were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and BET specific surface area. Different phases were obtained depending on the calcination temperature: amorphous, γ (metastable) or α (stable). The amorphous-to-γ transition was found for calcination temperatures in the range of 700-900 °C, while the γ-to-α one was observed for calcination temperatures of 1100-1200 °C. The retention of the metastable γ phase is probably due to a crystallite size effect. It transforms to the α phase after the crystallite size increases over a critical size during the calcination process at 1200 °C. The highest BET specific surface areas were obtained for both nitrate-aspartic acid routes proposed in this work, reaching values of about 50 m2/g. © 2009 Elsevier B.V. All rights reserved.Fil: Gardey Merino, María Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; Argentina. Universidad Tecnológica Nacional; ArgentinaFil: Lascalea, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; ArgentinaFil: Sánchez, Laura M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; ArgentinaFil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Cabanillas, Edgardo Domingo. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lamas, Diego Germán. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; ArgentinaElsevier Science Sa2010-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/77473Gardey Merino, María Celeste; Lascalea, Gustavo Enrique; Sánchez, Laura M.; Vazquez, Patricia Graciela; Cabanillas, Edgardo Domingo; et al.; Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes; Elsevier Science Sa; Journal of Alloys and Compounds; 495; 2; 4-2010; 578-5820925-8388CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0925838809020003info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jallcom.2009.10.042info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:19:03Zoai:ri.conicet.gov.ar:11336/77473instacron: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 10:19:03.332CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes |
title |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes |
spellingShingle |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes Gardey Merino, María Celeste Nanostructured Materials Oxide Materials X-Ray Diffraction |
title_short |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes |
title_full |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes |
title_fullStr |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes |
title_full_unstemmed |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes |
title_sort |
Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes |
dc.creator.none.fl_str_mv |
Gardey Merino, María Celeste Lascalea, Gustavo Enrique Sánchez, Laura M. Vazquez, Patricia Graciela Cabanillas, Edgardo Domingo Lamas, Diego Germán |
author |
Gardey Merino, María Celeste |
author_facet |
Gardey Merino, María Celeste Lascalea, Gustavo Enrique Sánchez, Laura M. Vazquez, Patricia Graciela Cabanillas, Edgardo Domingo Lamas, Diego Germán |
author_role |
author |
author2 |
Lascalea, Gustavo Enrique Sánchez, Laura M. Vazquez, Patricia Graciela Cabanillas, Edgardo Domingo Lamas, Diego Germán |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Nanostructured Materials Oxide Materials X-Ray Diffraction |
topic |
Nanostructured Materials Oxide Materials X-Ray Diffraction |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.10 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
In this work, two new gel-combustion routes for the synthesis of Al2O3 nanopowders with aspartic acid as fuel are presented. The first route is a conventional stoichiometric process, while the second one is a non-stoichiometric, pH-controlled process. These routes were compared with similar synthesis procedures using glycine as fuel, which are well-known in the literature. The samples were calcined in air at different temperatures, in a range of 600-1200 °C. They were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and BET specific surface area. Different phases were obtained depending on the calcination temperature: amorphous, γ (metastable) or α (stable). The amorphous-to-γ transition was found for calcination temperatures in the range of 700-900 °C, while the γ-to-α one was observed for calcination temperatures of 1100-1200 °C. The retention of the metastable γ phase is probably due to a crystallite size effect. It transforms to the α phase after the crystallite size increases over a critical size during the calcination process at 1200 °C. The highest BET specific surface areas were obtained for both nitrate-aspartic acid routes proposed in this work, reaching values of about 50 m2/g. © 2009 Elsevier B.V. All rights reserved. Fil: Gardey Merino, María Celeste. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; Argentina. Universidad Tecnológica Nacional; Argentina Fil: Lascalea, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Tecnológicas. Laboratorio de Investigaciones y Servicios Ambientales Mendoza; Argentina Fil: Sánchez, Laura M.. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; Argentina Fil: Vazquez, Patricia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina Fil: Cabanillas, Edgardo Domingo. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Lamas, Diego Germán. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Científicas y Técnicas de las Fuerzas Armadas. Centro de Investigaciones en Sólidos; Argentina |
description |
In this work, two new gel-combustion routes for the synthesis of Al2O3 nanopowders with aspartic acid as fuel are presented. The first route is a conventional stoichiometric process, while the second one is a non-stoichiometric, pH-controlled process. These routes were compared with similar synthesis procedures using glycine as fuel, which are well-known in the literature. The samples were calcined in air at different temperatures, in a range of 600-1200 °C. They were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and BET specific surface area. Different phases were obtained depending on the calcination temperature: amorphous, γ (metastable) or α (stable). The amorphous-to-γ transition was found for calcination temperatures in the range of 700-900 °C, while the γ-to-α one was observed for calcination temperatures of 1100-1200 °C. The retention of the metastable γ phase is probably due to a crystallite size effect. It transforms to the α phase after the crystallite size increases over a critical size during the calcination process at 1200 °C. The highest BET specific surface areas were obtained for both nitrate-aspartic acid routes proposed in this work, reaching values of about 50 m2/g. © 2009 Elsevier B.V. All rights reserved. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-04 |
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/11336/77473 Gardey Merino, María Celeste; Lascalea, Gustavo Enrique; Sánchez, Laura M.; Vazquez, Patricia Graciela; Cabanillas, Edgardo Domingo; et al.; Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes; Elsevier Science Sa; Journal of Alloys and Compounds; 495; 2; 4-2010; 578-582 0925-8388 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/77473 |
identifier_str_mv |
Gardey Merino, María Celeste; Lascalea, Gustavo Enrique; Sánchez, Laura M.; Vazquez, Patricia Graciela; Cabanillas, Edgardo Domingo; et al.; Nanostructured aluminium oxide powders obtained by aspartic acid-nitrate gel-combustion routes; Elsevier Science Sa; Journal of Alloys and Compounds; 495; 2; 4-2010; 578-582 0925-8388 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/S0925838809020003 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jallcom.2009.10.042 |
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 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 |
_version_ |
1844614158568390656 |
score |
13.070432 |