High Purity Mullite by Slip Casting Method from Calcined Alumina and Kaolinitic Clay

The mullite – 3Al₂O₃.2SiO₂-, has different applications, specially in refractory materials, as it is the silicoaluminous refractory material for excellence. The most frequent methods used to prepare mullite are based on the thermal decomposition of clay or kaolin, supplemented with alumina to achiev...

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Autores principales: Moreno Erazo, Ángela Ximena, Scian, Alberto Néstor
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Química
Mullite
Kaolinitc Clay
Alumina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/147619
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-147619
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
Química
Mullite
Kaolinitc Clay
Alumina
spellingShingle Ciencias Exactas
Química
Mullite
Kaolinitc Clay
Alumina
Moreno Erazo, Ángela Ximena
Scian, Alberto Néstor
High Purity Mullite by Slip Casting Method from Calcined Alumina and Kaolinitic Clay
topic_facet Ciencias Exactas
Química
Mullite
Kaolinitc Clay
Alumina
description The mullite – 3Al₂O₃.2SiO₂-, has different applications, specially in refractory materials, as it is the silicoaluminous refractory material for excellence. The most frequent methods used to prepare mullite are based on the thermal decomposition of clay or kaolin, supplemented with alumina to achieve the desired stoichiometry, or also by mixing silica with alumina with the suitable thermal treatment. In this work mullites were obtained from two different mixtures of two clays as raw materials (Tincar Súper clay and La Rioja clay) and one source of alumina (calcined alumina) using in both cases a 3Al₂O₃.2SiO₂ stoichiometry. With the aim of proceeding to formulate synthetic mullite with 3-2 stoichiometry (100 gr of Tincar Super clay with 147.2 gr of calcined alumina (AtinAcal) and 100 gr of La Rioja clay with 80 gr of calcined alumina (AriojAcal)), a suspension of 78 wt% of solids in distilled water was prepared using ammonium polyacrylate as dispersant. To shape specimens casting method in plaster moulds was used, obtaining probes of 0.80 by 0.80 by 6.0 cm³, dried at 110° C and later calcined at 1550° C for 4 hours. Probes calcined were characterized by X-Ray diffraction (XRD), modulus of rupture, thermal shock resistance, density and porosity by Archimedes method (open pores), and permanent lineal change with respect to the forming mold.
format Articulo
Articulo
author Moreno Erazo, Ángela Ximena
Scian, Alberto Néstor
author_facet Moreno Erazo, Ángela Ximena
Scian, Alberto Néstor
author_sort Moreno Erazo, Ángela Ximena
title High Purity Mullite by Slip Casting Method from Calcined Alumina and Kaolinitic Clay
title_short High Purity Mullite by Slip Casting Method from Calcined Alumina and Kaolinitic Clay
title_full High Purity Mullite by Slip Casting Method from Calcined Alumina and Kaolinitic Clay
title_fullStr High Purity Mullite by Slip Casting Method from Calcined Alumina and Kaolinitic Clay
title_full_unstemmed High Purity Mullite by Slip Casting Method from Calcined Alumina and Kaolinitic Clay
title_sort high purity mullite by slip casting method from calcined alumina and kaolinitic clay
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/147619
work_keys_str_mv AT morenoerazoangelaximena highpuritymullitebyslipcastingmethodfromcalcinedaluminaandkaoliniticclay
AT scianalbertonestor highpuritymullitebyslipcastingmethodfromcalcinedaluminaandkaoliniticclay
bdutipo_str Repositorios
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