Effects of water content of gels on sol-gel glass structures

G. Kordas; L. C. Klein

doi:10.1016/0022-3093(86)90793-3

Effects of water content of gels on sol-gel glass structures

G. Kordas, L. C. Klein

School of Engineering, Materials Science & Engineering

Rutgers, The State University

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

SiO₂ gels produced by 4 and 16 mol water/mol Si(OC₂H₅)₄ [TEOS] were densified at 1000°C and then exposed to γ-ray irradiation in order to produce paramagnetic defect centers. The paramagnetic defect centers detected in the sol-gel (n = 4,16) glasses depend on the mol H₂O/mol TEOS ratio (n = 4,16) of the gels from which they wer derived. In the n = 16 sol-gel glass three different O₂^- ions were detected while in the n = 4 sol-gel glass the E′ center and the CO₂^- radical were observed. Some of these paramagnetic states were not found in the SiO₂ glasses produced by the oxide melting techniques. These differences may suggest structural differences between the structures of the SiO₂ glasses produced by the sol-gel and oxide melting techniques.

Original language	American English
Pages (from-to)	325-328
Number of pages	4
Journal	Journal of Non-Crystalline Solids
Volume	84
Issue number	1-3
DOIs	https://doi.org/10.1016/0022-3093(86)90793-3
State	Published - Jul 2 1986

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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title = "Effects of water content of gels on sol-gel glass structures",

abstract = "SiO2 gels produced by 4 and 16 mol water/mol Si(OC2H5)4 [TEOS] were densified at 1000°C and then exposed to γ-ray irradiation in order to produce paramagnetic defect centers. The paramagnetic defect centers detected in the sol-gel (n = 4,16) glasses depend on the mol H2O/mol TEOS ratio (n = 4,16) of the gels from which they wer derived. In the n = 16 sol-gel glass three different O2- ions were detected while in the n = 4 sol-gel glass the E′ center and the CO2- radical were observed. Some of these paramagnetic states were not found in the SiO2 glasses produced by the oxide melting techniques. These differences may suggest structural differences between the structures of the SiO2 glasses produced by the sol-gel and oxide melting techniques.",

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AU - Klein, L. C.

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N2 - SiO2 gels produced by 4 and 16 mol water/mol Si(OC2H5)4 [TEOS] were densified at 1000°C and then exposed to γ-ray irradiation in order to produce paramagnetic defect centers. The paramagnetic defect centers detected in the sol-gel (n = 4,16) glasses depend on the mol H2O/mol TEOS ratio (n = 4,16) of the gels from which they wer derived. In the n = 16 sol-gel glass three different O2- ions were detected while in the n = 4 sol-gel glass the E′ center and the CO2- radical were observed. Some of these paramagnetic states were not found in the SiO2 glasses produced by the oxide melting techniques. These differences may suggest structural differences between the structures of the SiO2 glasses produced by the sol-gel and oxide melting techniques.

AB - SiO2 gels produced by 4 and 16 mol water/mol Si(OC2H5)4 [TEOS] were densified at 1000°C and then exposed to γ-ray irradiation in order to produce paramagnetic defect centers. The paramagnetic defect centers detected in the sol-gel (n = 4,16) glasses depend on the mol H2O/mol TEOS ratio (n = 4,16) of the gels from which they wer derived. In the n = 16 sol-gel glass three different O2- ions were detected while in the n = 4 sol-gel glass the E′ center and the CO2- radical were observed. Some of these paramagnetic states were not found in the SiO2 glasses produced by the oxide melting techniques. These differences may suggest structural differences between the structures of the SiO2 glasses produced by the sol-gel and oxide melting techniques.

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Effects of water content of gels on sol-gel glass structures

Abstract

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