Titania-silica glasses prepared by sintering alkoxide derived spherical colloids

W. T. Minehan, G. L. Messing, C. G. Pantano

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Abstract

Titania-silica glasses of 3.1 to 8.5 wt% titania were prepared by sintering alkoxide synthesized colloidal powders. The process capitalizes on the advantages of sol-gel chemistry for powder synthesis while circumventing the problem of drying gels. Green bodies formed by colloidal gelation, uniaxial dry pressing and tape casting were sintered from 1200 to 1500°C to yield crystallite-free glasses. Complete solution of up to 8.5 wt% titania was inferred from TEM and FTIR analysis. Thermal expansion coefficients ranged from 2.6 × 10-7 to -0.38 × 10-7/°C between 25 and 700°C for glasses containing 3.1 to 8.5% TiO2, respectively.

Original languageEnglish (US)
Pages (from-to)163-168
Number of pages6
JournalJournal of Non-Crystalline Solids
Volume108
Issue number2
DOIs
StatePublished - Mar 1989

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All Science Journal Classification (ASJC) codes

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

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