Structural Evolution of Colloidal Silica Gels to Glass

Jackie Y. Ying; Jay B. Benziger; Alexandra Navrotsky

doi:10.1111/j.1151-2916.1993.tb03982.x

Structural Evolution of Colloidal Silica Gels to Glass

Jackie Y. Ying, Jay B. Benziger, Alexandra Navrotsky

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30 Scopus citations

Abstract

The gel‐to‐ceramic evolution of colloidal‐derived silica gels was examined by thermal analysis, infrared photoacoustic spectroscopy, physical characterization, and high‐temperature calorimetry. Oxygen in the firing atmosphere promoted sintering of colloidal gels relative to firing in a nitrogen or argon atmosphere. Water vapor in the atmosphere promoted consolidation and crystallization to cristobalite. Addition of PVA to the colloidal gel resulted in consolidation and crystallization of the gel at 1000°C, ∼150°C less than gels without the PVA binder. The enthalpy of consolidation of the gels to fused silica glass was approximately − 10 kJ/mol, primarily due to reduction of surface area.

Original language	English (US)
Pages (from-to)	2561-2570
Number of pages	10
Journal	Journal of the American Ceramic Society
Volume	76
Issue number	10
DOIs	https://doi.org/10.1111/j.1151-2916.1993.tb03982.x
State	Published - Oct 1993
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1993.tb03982.x

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title = "Structural Evolution of Colloidal Silica Gels to Glass",

abstract = "The gel‐to‐ceramic evolution of colloidal‐derived silica gels was examined by thermal analysis, infrared photoacoustic spectroscopy, physical characterization, and high‐temperature calorimetry. Oxygen in the firing atmosphere promoted sintering of colloidal gels relative to firing in a nitrogen or argon atmosphere. Water vapor in the atmosphere promoted consolidation and crystallization to cristobalite. Addition of PVA to the colloidal gel resulted in consolidation and crystallization of the gel at 1000°C, ∼150°C less than gels without the PVA binder. The enthalpy of consolidation of the gels to fused silica glass was approximately − 10 kJ/mol, primarily due to reduction of surface area.",

author = "Ying, {Jackie Y.} and Benziger, {Jay B.} and Alexandra Navrotsky",

year = "1993",

month = oct,

doi = "10.1111/j.1151-2916.1993.tb03982.x",

language = "English (US)",

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journal = "Journal of the American Ceramic Society",

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T1 - Structural Evolution of Colloidal Silica Gels to Glass

AU - Ying, Jackie Y.

AU - Benziger, Jay B.

AU - Navrotsky, Alexandra

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N2 - The gel‐to‐ceramic evolution of colloidal‐derived silica gels was examined by thermal analysis, infrared photoacoustic spectroscopy, physical characterization, and high‐temperature calorimetry. Oxygen in the firing atmosphere promoted sintering of colloidal gels relative to firing in a nitrogen or argon atmosphere. Water vapor in the atmosphere promoted consolidation and crystallization to cristobalite. Addition of PVA to the colloidal gel resulted in consolidation and crystallization of the gel at 1000°C, ∼150°C less than gels without the PVA binder. The enthalpy of consolidation of the gels to fused silica glass was approximately − 10 kJ/mol, primarily due to reduction of surface area.

AB - The gel‐to‐ceramic evolution of colloidal‐derived silica gels was examined by thermal analysis, infrared photoacoustic spectroscopy, physical characterization, and high‐temperature calorimetry. Oxygen in the firing atmosphere promoted sintering of colloidal gels relative to firing in a nitrogen or argon atmosphere. Water vapor in the atmosphere promoted consolidation and crystallization to cristobalite. Addition of PVA to the colloidal gel resulted in consolidation and crystallization of the gel at 1000°C, ∼150°C less than gels without the PVA binder. The enthalpy of consolidation of the gels to fused silica glass was approximately − 10 kJ/mol, primarily due to reduction of surface area.

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M3 - Article

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JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

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Structural Evolution of Colloidal Silica Gels to Glass

Abstract

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