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Characterization of CeO2–Al2O3–SiO2 glasses by infrared and x-ray absorption near edge structure spectroscopies

Published online by Cambridge University Press:  31 January 2011

Sin-Lung Lin ,
Chii-Shyang Hwang  and
Jyh-Fu Lee
Sin-Lung Lin
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan, Republic of China
Chii-Shyang Hwang
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan, Republic of China
Jyh-Fu Lee
Affiliation:
Research Division, Synchrotron Radiation Research Center, Hsinchu, Taiwan, Republic of China
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Abstract

Structural characteristics of CeO2–Al2O3–SiO2 glasses have been studied by infrared and x-ray absorption near edge structure (XANES) spectroscopies, and the Kramers-Kronig analysis of IR reflection data was performed. Results of IR spectra show that ceria is the network modifier and favors the formation of [SiO4] tetrahedron with nonbridging oxygens. The high frequency Si–O–Si stretching vibrational peak near 1100 cm−1 shifts toward the lower frequency as ceria content increases and alumina content is constant. XANES data of the cerium LIII edge show that the majority of cerium ions in cerium aluminosilicate glasses are Ce3+ ions. The ratio of Ce4+/Ce3+ increases with increasing the ratio of Ce/(Al + Si). However, the ratio of Ce4+/Ce3+ decreases with increasing the ratio of Al/(Al + Si).

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 10 , October 1996 , pp. 2641 - 2650
Copyright
Copyright © Materials Research Society 1996

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