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Long Gonzalez, D., López Cuevas, J., Gutierrez Chavarria, C.A., Pena, P., 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.
Title: | Synthesis of monoclinic Celsian from coal fly ash by using a one-step solid-state reaction |
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Author/s: |
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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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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.
Item ID: | 8755 |
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DC Identifier: | https://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/02728... |
Deposited by: | Memoria Investigacion |
Deposited on: | 29 Sep 2011 07:54 |
Last Modified: | 20 Apr 2016 17:25 |