Extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an XRD and XANES analysis

The thermal transformations processes of kaolinite (K) in kaolinitic clays is knownto consist of a dehydroxylation into metakaolin (MK) at ≈600 °C, followed by the formation of a spinel type aluminosilicate (SAS) at≈980 °C, and finally the development of mullite (M) at higher temperatures (1200–1300...

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Detalles Bibliográficos
Autores principales: Andrini, Leandro Rubén, Gauna, Matías Roberto, Conconi, María Susana, Suárez, Gustavo, Requejo, Félix Gregorio, Aglietti, Esteban Fausto, Rendtorff Birrer, Nicolás Maximiliano
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Química
Kaolinitic clay
Firing transformations
X-ray absorption
Al K-XANES
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/119451
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-119451
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Kaolinitic clay
Firing transformations
X-ray absorption
Al K-XANES
spellingShingle Química
Kaolinitic clay
Firing transformations
X-ray absorption
Al K-XANES
Andrini, Leandro Rubén
Gauna, Matías Roberto
Conconi, María Susana
Suárez, Gustavo
Requejo, Félix Gregorio
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
Extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an XRD and XANES analysis
topic_facet Química
Kaolinitic clay
Firing transformations
X-ray absorption
Al K-XANES
description The thermal transformations processes of kaolinite (K) in kaolinitic clays is knownto consist of a dehydroxylation into metakaolin (MK) at ≈600 °C, followed by the formation of a spinel type aluminosilicate (SAS) at≈980 °C, and finally the development of mullite (M) at higher temperatures (1200–1300 °C). The structural characterization of thesematerials is generally based on X-ray diffraction (XRD) studies,where the XRD features of K and M are well defined due to their crystalline nature, but as consequence of the low crystallinity of MK and SAS, the precise characterization of these phases is not possible using this technique. In this study the nature of aluminum atoms in the different materials obtained by thermal treatments of a kaolinite is investigated using Al K-XANES and compared with other well-known aluminum containing materials. XRD and SEM characterization were also carried out. The results confirm the potentiality of this synchrotron based techniques for the characterization of natural materials and ceramics especially with low crystallinity. Particularly the mullite aluminums Al K-XANES spectra were not reported before.
format Articulo
Articulo
author Andrini, Leandro Rubén
Gauna, Matías Roberto
Conconi, María Susana
Suárez, Gustavo
Requejo, Félix Gregorio
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
author_facet Andrini, Leandro Rubén
Gauna, Matías Roberto
Conconi, María Susana
Suárez, Gustavo
Requejo, Félix Gregorio
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
author_sort Andrini, Leandro Rubén
title Extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an XRD and XANES analysis
title_short Extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an XRD and XANES analysis
title_full Extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an XRD and XANES analysis
title_fullStr Extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an XRD and XANES analysis
title_full_unstemmed Extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an XRD and XANES analysis
title_sort extended and local structural description of a kaolinitic clay, its fired ceramics and intermediates: an xrd and xanes analysis
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/119451
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