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Structure of heat-treated sol-gel SiO2 glasses containing silver

Published online by Cambridge University Press:  31 January 2011

M. G. Garníca-Romo ,
J. González-Hernández ,
M. A. Hernández-Landaverde ,
Y. V. Vorobiev ,
F. Ruiz  and
J. R. Martínez
M. G. Garníca-Romo
Affiliation:
División de Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Querétaro, Qro., México
J. González-Hernández
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Querétaro, Qro., México
M. A. Hernández-Landaverde
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Querétaro, Qro., México
Y. V. Vorobiev
Affiliation:
Centro de Investigación y de Estudios Avanzados del IPN, Unidad Querétaro, Querétaro, Qro., México
F. Ruiz*
Affiliation:
Facultad de Ciencias, Universidad Autónoma de San Luis Potosí 78000, San Luis Potosí, S.L.P. México
J. R. Martínez
Affiliation:
Facultad de Ciencias, Universidad Autónoma de San Luis Potosí 78000, San Luis Potosí, S.L.P. México
*
a)Address all correspondence to this author.
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Abstract

The crystallization of bulk amorphous SiO2 samples, prepared by the sol-gel method, was obtained by heat treatments in air at temperatures as low as 500 °C. This occurs when silver is added to the precursor solutions in an amount such that it forms aggregates embedded in the glass. Another requirement to observe the low-temperature glass crystallization is that the bulk samples must be prepared from precursor solutions with specific compositions. These compositions, have a high H2O/TEOS ratio, which produces an amorphous SiO2 structure with some structural similarities to cristobalite, the phase in which the SiO2 glass crystallizes.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 7 , July 2001 , pp. 2007 - 2012
Copyright
Copyright © Materials Research Society 2001

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