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Effect of Gradual Substitution of CaO by SrO in Glass-Ceramic Materials of the System SiO2 - Al2O3 - CaF2 - RO (R = Ca, Mg, Sr)

Published online by Cambridge University Press:  14 February 2012

M. Garza-García ,
J. López-Cuevas ,
C.A. Gutiérrez-Chavarría ,
N. Piedad-Sánchez ,
E. Camporredondo-Saucedo  and
O. Hernández-Ibarra
M. Garza-García
Affiliation:
Universidad Autónoma de Coahuila, Escuela Superior de Ingeniería, Nueva Rosita, Coahuila, México.
J. López-Cuevas
Affiliation:
Centro de Investigación y Estudios Avanzados del IPN, Unidad Saltillo, Coahuila, México.
C.A. Gutiérrez-Chavarría
Affiliation:
Centro de Investigación y Estudios Avanzados del IPN, Unidad Saltillo, Coahuila, México.
N. Piedad-Sánchez
Affiliation:
Facultad de Metalurgia. Universidad Autónoma de Coahuila, Monclova, Coahuila, México.
E. Camporredondo-Saucedo
Affiliation:
Facultad de Metalurgia. Universidad Autónoma de Coahuila, Monclova, Coahuila, México.
O. Hernández-Ibarra
Affiliation:
Instituto Tecnológico de Estudios Superiores de la Región Carbonífera, Coahuila, México.
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Abstract

The density, Vickers microhardness and crystallization fraction of glass-ceramic materials synthesized from parent glasses are determined in which CaO is gradually substituted by SrO. The chemical composition (in mol.%) of the parent glasses is 54SiO2-(23-X)CaO-12MgO-5Al2O3-6CaF2-XSrO, where X is the employed CaO substitution level (X = 0, 3, 6 and 9 mol.%, with X = 0 corresponding to the reference material). In order to determine the type of crystallization occurring in the glass-ceramic samples, as well as the crystalline phases formed in them, these are characterized by both Scanning Electron Microscopy (SEM/EDS) and X-Ray Diffraction (XRD). Independently of the CaO substitution level employed, the glass-ceramics show the formation of a solid solution corresponding to diopside-type pyroxene, with chemical formula Ca(Mg,Al)(Al,Si)2O6, as a single crystalline phase. The synthesized glass-ceramic materials with the reference composition show the highest Vickers microhardness and crystallization fraction, as well as the lowest density.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1373: Symposium S4 – Advanced Structural Materials—2011 , 2012 , imrc-1373-s4-09
Copyright
Copyright © Materials Research Society 2012

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References

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