Structural Evolution of Colloidal Silica Gels to Glass

Jackie Y. Ying, Jay Burton Benziger, Alexandra Navrotsky

Research output: Contribution to journalArticle

29 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 languageEnglish (US)
Pages (from-to)2561-2570
Number of pages10
JournalJournal of the American Ceramic Society
Volume76
Issue number10
DOIs
StatePublished - Jan 1 1993

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Structural Evolution of Colloidal Silica Gels to Glass'. Together they form a unique fingerprint.

  • Cite this