Ultralow expansion TiO2SiO2 glasses can be prepared by a variety of sol-gel routes. The Raman spectra are similar to the spectra of glasses prepared by high-temperature melt and vapor deposition techniques. The Raman spectra resemble the spectra of silica glass with the addition of a polarized band at 1106 cm-1and a depolarized band at 933 cm-1which varied in intensity with titanium concentration. The spectra are explained in terms of titanium-rich clusters within a matrix of silica-rich glass. The onset of crystallization in heat-treated glasses is seen in the Raman spectra as a series of sharp bands characteristic of the anatase form of TiO2.
All Science Journal Classification (ASJC) codes
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering