Sintering of titania-silica powder compacts with a bimodal pore-size distribution

W. T. Minehan, M. R. Schaefer, G. L. Messing

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The sintering of 7.3% TiO2{single bond}SiO2 powders that were synthesized by the spontaneous emulsification of metal alkoxides was studied. The particles were ∼ 130 nm in diameter and consisted of primary particles of 32 nm diameter. The bimodal pore size distribution of powder compacts resulted in a two-stage sintering process with the individual particles sintering to full density at 1075°C and the interparticle porosity requiring 1200°C for complete removal. By using the compact density at the beginning of the interparticle stage of densification, it was determined that the sintering of the glass powders fits Scherer's open pore, viscous sintering model. The viscosities of the TiO2{single bond}SiO2 glass derived from the model are in reasonable agreement with literature reports for titania-silica glasses.

Original languageEnglish (US)
Pages (from-to)582-587
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume147-148
Issue numberC
DOIs
StatePublished - 1992

All Science Journal Classification (ASJC) codes

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

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