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

Long Gonzalez, D.; López Cuevas, J.; Gutierrez Chavarria, C.A.; Pena, P.; Baudin, C. y 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.

Descripción

Título: Synthesis of monoclinic Celsian from coal fly ash by using a one-step solid-state reaction
Autor/es:
  • Long Gonzalez, D.
  • López Cuevas, J.
  • Gutierrez Chavarria, C.A.
  • Pena, P.
  • Baudin, C.
  • Turrillas Maisterra, Javier Miguel
Tipo de Documento: Artículo
Título de Revista/Publicación: Ceramics International
Fecha: Marzo 2010
Volumen: 36
Materias:
Palabras Clave Informales: (A) Powders: solid-state reaction; (B) X-ray methods; (E) Thermal applications; Celsian
Escuela: Otros Centros UPM
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 8755
Identificador DC: http://oa.upm.es/8755/
Identificador OAI: oai:oa.upm.es:8755
Identificador DOI: 10.1016/j.ceramint.2009.10.008
URL Oficial: http://www.sciencedirect.com/science/journal/02728842
Depositado por: Memoria Investigacion
Depositado el: 29 Sep 2011 07:54
Ultima Modificación: 20 Abr 2016 17:25
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