Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid

Autores
Hernández, María Florencia; Suárez, Gustavo; Cipollone, Mariano; Conconi, María Susana; Aglietti, Esteban Fausto; Rendtorff Birrer, Nicolás Maximiliano
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The formation of aluminum borates (Al18B4O33 and Al4B2O9) from alumina and boron oxide occurs between 600 and 800 °C. These materials have refractory properties and corrosion resistance. The objective of this work is to develop materials from the Al2O3-B2O3 system, employing alumina and boric acid as starting powders, to study the critical processing variables and describe the developed microstructure and properties. Three formulations (13, 19.5 and 26 wt% B2O3) were studied. In order to confirm the formation of borates, the differential thermal analysis and thermogravimetric analysis were carried out. Afterwards, uniaxially pressed disc-shaped specimens were fired at four temperatures above the formation temperature. The textural properties of the ceramics were evaluated by the immersion method, this permit to evaluate the sintering processes. Then the degree of borate formation was confirmed by X-ray diffraction. Finally, the developed microstructures were characterized by scanning electron microscopy, and the diametral compression behavior was evaluated. A series of porous (≈50%) refractory materials from the Al2O3-B2O3 system were developed. The processing strategy resulted in materials with Al18B4O33 as the main crystalline phase. Needle grains with diameters between 0.2 and 1 μm and an aspect ratio over 20:1 were obtained. Thus, based on the information gathered from our research, aluminum borate ceramic materials can be designed for structural, insulating or filtering applications employing only alumina and boric acid as boron oxide source.
Centro de Tecnología de Recursos Minerales y Cerámica
Facultad de Ciencias Exactas
Materia
Química
Porous ceramics
Aluminum borate
Processing
Characterization
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/104762
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/104762
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acidHernández, María FlorenciaSuárez, GustavoCipollone, MarianoConconi, María SusanaAglietti, Esteban FaustoRendtorff Birrer, Nicolás MaximilianoQuímicaPorous ceramicsAluminum borateProcessingCharacterizationThe formation of aluminum borates (Al18B4O33 and Al4B2O9) from alumina and boron oxide occurs between 600 and 800 °C. These materials have refractory properties and corrosion resistance. The objective of this work is to develop materials from the Al2O3-B2O3 system, employing alumina and boric acid as starting powders, to study the critical processing variables and describe the developed microstructure and properties. Three formulations (13, 19.5 and 26 wt% B2O3) were studied. In order to confirm the formation of borates, the differential thermal analysis and thermogravimetric analysis were carried out. Afterwards, uniaxially pressed disc-shaped specimens were fired at four temperatures above the formation temperature. The textural properties of the ceramics were evaluated by the immersion method, this permit to evaluate the sintering processes. Then the degree of borate formation was confirmed by X-ray diffraction. Finally, the developed microstructures were characterized by scanning electron microscopy, and the diametral compression behavior was evaluated. A series of porous (≈50%) refractory materials from the Al2O3-B2O3 system were developed. The processing strategy resulted in materials with Al18B4O33 as the main crystalline phase. Needle grains with diameters between 0.2 and 1 μm and an aspect ratio over 20:1 were obtained. Thus, based on the information gathered from our research, aluminum borate ceramic materials can be designed for structural, insulating or filtering applications employing only alumina and boric acid as boron oxide source.Centro de Tecnología de Recursos Minerales y CerámicaFacultad de Ciencias Exactas2017-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2188-2195http://sedici.unlp.edu.ar/handle/10915/104762enginfo:eu-repo/semantics/altIdentifier/issn/0272-8842info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ceramint.2016.11.002info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-17T10:05:39Zoai:sedici.unlp.edu.ar:10915/104762Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-17 10:05:39.804SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
title Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
spellingShingle Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
Hernández, María Florencia
Química
Porous ceramics
Aluminum borate
Processing
Characterization
title_short Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
title_full Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
title_fullStr Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
title_full_unstemmed Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
title_sort Formation, microstructure and properties of aluminum borate ceramics obtained from alumina and boric acid
dc.creator.none.fl_str_mv Hernández, María Florencia
Suárez, Gustavo
Cipollone, Mariano
Conconi, María Susana
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
author Hernández, María Florencia
author_facet Hernández, María Florencia
Suárez, Gustavo
Cipollone, Mariano
Conconi, María Susana
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
author_role author
author2 Suárez, Gustavo
Cipollone, Mariano
Conconi, María Susana
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Química
Porous ceramics
Aluminum borate
Processing
Characterization
topic Química
Porous ceramics
Aluminum borate
Processing
Characterization
dc.description.none.fl_txt_mv The formation of aluminum borates (Al18B4O33 and Al4B2O9) from alumina and boron oxide occurs between 600 and 800 °C. These materials have refractory properties and corrosion resistance. The objective of this work is to develop materials from the Al2O3-B2O3 system, employing alumina and boric acid as starting powders, to study the critical processing variables and describe the developed microstructure and properties. Three formulations (13, 19.5 and 26 wt% B2O3) were studied. In order to confirm the formation of borates, the differential thermal analysis and thermogravimetric analysis were carried out. Afterwards, uniaxially pressed disc-shaped specimens were fired at four temperatures above the formation temperature. The textural properties of the ceramics were evaluated by the immersion method, this permit to evaluate the sintering processes. Then the degree of borate formation was confirmed by X-ray diffraction. Finally, the developed microstructures were characterized by scanning electron microscopy, and the diametral compression behavior was evaluated. A series of porous (≈50%) refractory materials from the Al2O3-B2O3 system were developed. The processing strategy resulted in materials with Al18B4O33 as the main crystalline phase. Needle grains with diameters between 0.2 and 1 μm and an aspect ratio over 20:1 were obtained. Thus, based on the information gathered from our research, aluminum borate ceramic materials can be designed for structural, insulating or filtering applications employing only alumina and boric acid as boron oxide source.
Centro de Tecnología de Recursos Minerales y Cerámica
Facultad de Ciencias Exactas
description The formation of aluminum borates (Al18B4O33 and Al4B2O9) from alumina and boron oxide occurs between 600 and 800 °C. These materials have refractory properties and corrosion resistance. The objective of this work is to develop materials from the Al2O3-B2O3 system, employing alumina and boric acid as starting powders, to study the critical processing variables and describe the developed microstructure and properties. Three formulations (13, 19.5 and 26 wt% B2O3) were studied. In order to confirm the formation of borates, the differential thermal analysis and thermogravimetric analysis were carried out. Afterwards, uniaxially pressed disc-shaped specimens were fired at four temperatures above the formation temperature. The textural properties of the ceramics were evaluated by the immersion method, this permit to evaluate the sintering processes. Then the degree of borate formation was confirmed by X-ray diffraction. Finally, the developed microstructures were characterized by scanning electron microscopy, and the diametral compression behavior was evaluated. A series of porous (≈50%) refractory materials from the Al2O3-B2O3 system were developed. The processing strategy resulted in materials with Al18B4O33 as the main crystalline phase. Needle grains with diameters between 0.2 and 1 μm and an aspect ratio over 20:1 were obtained. Thus, based on the information gathered from our research, aluminum borate ceramic materials can be designed for structural, insulating or filtering applications employing only alumina and boric acid as boron oxide source.
publishDate 2017
dc.date.none.fl_str_mv 2017-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/104762
url http://sedici.unlp.edu.ar/handle/10915/104762
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0272-8842
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ceramint.2016.11.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
2188-2195
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instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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