Firing transformations of an Argentinean calcareous commercial clay

Mineralogical transformations caused by firing are usually studied by XRD methods only semi-quantitatively. In this work the original mineral disappearance and the neo-mineralization were evaluated quantitatively. Furthermore an indirect non crystalline phase quantification was performed under 1100°...

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Detalles Bibliográficos
Autores principales: Serra, María Florencia, Conconi, María Susana, Suárez, Gustavo, Aglietti, Esteban Fausto, Rendtorff Birrer, Nicolás Maximiliano
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Exactas
Silicate ceramic processing
Structure
X-ray diffraction
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85602
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85602
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Silicate ceramic processing
Structure
X-ray diffraction
spellingShingle Ciencias Exactas
Silicate ceramic processing
Structure
X-ray diffraction
Serra, María Florencia
Conconi, María Susana
Suárez, Gustavo
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
Firing transformations of an Argentinean calcareous commercial clay
topic_facet Ciencias Exactas
Silicate ceramic processing
Structure
X-ray diffraction
description Mineralogical transformations caused by firing are usually studied by XRD methods only semi-quantitatively. In this work the original mineral disappearance and the neo-mineralization were evaluated quantitatively. Furthermore an indirect non crystalline phase quantification was performed under 1100°C was also carried out using the quartz content as internal standard. This study specifically discusses the behavior of an Argentinean white calcareous earthenware commercial when subjected to traditional ceramic firing, besides the technological importance of this particular material, it acts as a model for other clay based ceramic materials. Materials were subjected to thermal treatments between 700°C and 1100°C. A preliminary sintering characterization was carried out by contraction and porosity evolution. Simultaneous thermogravimetric and differential thermal analysis (TG-DTA) was carried out to elucidate the actual temperature at which the chemical changes°Ccur. Finally, a quantitative analysis based on the Rietveld refinement of the X-ray diffraction patterns was performed to characterize the crystalline phases present in both the clay and in the materials obtained after different thermal treatments. The actual chemical reactions are proposed. The phases identified after firing at traditional working temperature (1040°C) are quartz, plagioclase, and the Spinel type alumino-silicate, accompanied by the non-diffracting un-reacted metakaolin and some amount of amorphous glassy phase. At intermediate temperatures (900°C) the presence of gehlenite was also detected. The carbonates (calcite and dolomite) presence and decomposition were also evaluated and demonstrated to determine the sintering characteristics of this material.
format Articulo
Articulo
author Serra, María Florencia
Conconi, María Susana
Suárez, Gustavo
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
author_facet Serra, María Florencia
Conconi, María Susana
Suárez, Gustavo
Aglietti, Esteban Fausto
Rendtorff Birrer, Nicolás Maximiliano
author_sort Serra, María Florencia
title Firing transformations of an Argentinean calcareous commercial clay
title_short Firing transformations of an Argentinean calcareous commercial clay
title_full Firing transformations of an Argentinean calcareous commercial clay
title_fullStr Firing transformations of an Argentinean calcareous commercial clay
title_full_unstemmed Firing transformations of an Argentinean calcareous commercial clay
title_sort firing transformations of an argentinean calcareous commercial clay
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85602
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