Synthesis of monoclinic Celsian from coal fly ash by using a one-step solid-state reaction

Long Gonzalez, D. and López Cuevas, J. and Gutierrez Chavarria, C.A. and Pena, P. and Baudin, C. and Turrillas Maisterra, Javier Miguel (2010). Synthesis of monoclinic Celsian from coal fly ash by using a one-step solid-state reaction. "Ceramics International", v. 36 (n. 2); pp. 661-672. ISSN 0272-8842. https://doi.org/10.1016/j.ceramint.2009.10.008.

Description

Title: Synthesis of monoclinic Celsian from coal fly ash by using a one-step solid-state reaction
Author/s:
  • Long Gonzalez, D.
  • López Cuevas, J.
  • Gutierrez Chavarria, C.A.
  • Pena, P.
  • Baudin, C.
  • Turrillas Maisterra, Javier Miguel
Item Type: Article
Título de Revista/Publicación: Ceramics International
Date: March 2010
ISSN: 0272-8842
Volume: 36
Subjects:
Freetext Keywords: (A) Powders: solid-state reaction; (B) X-ray methods; (E) Thermal applications; Celsian
Faculty: Otros Centros UPM
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Monoclinic (Celsian) and hexagonal (Hexacelsian) Ba1−xSrxAl2Si2O8 solid solutions, where x = 0, 0.25, 0.375, 0.5, 0.75 or 1, were synthesized by using Coal Fly Ash (CFA) as main raw material, employing a simple one-step solid-state reaction process involving thermal treatment for 5 h at 850–1300 °C. Fully monoclinic Celsian was obtained at 1200 °C/5 h, for SrO contents of 0.25 ≤ x ≤ 0.75. However, an optimum SrO level of 0.25 ≤ x ≤ 0.375 was recommended for the stabilization of Celsian. These synthesis conditions represent a significant improvement over the higher temperatures, longer times and/or multi-step processes needed to obtain fully monoclinic Celsian, when other raw materials are used for this purpose, according to previous literature. These results were attributed to the role of the chemical and phase constitution of CFA as well as to a likely mineralizing effect of CaO and TiO2 present in it, which enhanced the Hexacelsian to Celsian conversion.

More information

Item ID: 8755
DC Identifier: http://oa.upm.es/8755/
OAI Identifier: oai:oa.upm.es:8755
DOI: 10.1016/j.ceramint.2009.10.008
Official URL: http://www.sciencedirect.com/science/journal/02728842
Deposited by: Memoria Investigacion
Deposited on: 29 Sep 2011 07:54
Last Modified: 20 Apr 2016 17:25
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