Abstract
We investigated relatively new techniques for densification and crystallization of sol-gel silica, titania and silica-titania coatings at relatively low temperatures. Irradiation of ultraviolet photons above the band-gap energy was found to lead shrinkage of the sol-gel films through electronic excitations. Crystallization of sol-gel titania coatings was achieved by irradiation of ultraviolet laser (4.7 eV) beam. Exposure to water vapor was shown to be effective in rearrangement of sol-gel films causing densification of silica, crystallization of titania and phase separation of silica-titania around 100°C. These techniques are useful for preparation of hard silica coatings and crystalline titania films on low-heat-resistant substrates, such as polymer plates.
| Original language | English |
|---|---|
| Pages (from-to) | 91-94 |
| Number of pages | 4 |
| Journal | Thin Solid Films |
| Volume | 351 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 1999 Aug 30 |
| Event | Proceedings of the 1998 2nd International Confernce on Coatings on Glass (ICCG) - Saarbrucken, Germany Duration: 1998 Sept 6 → 1998 Sept 10 |
Keywords
- Laser irradiation
- Silicon oxide
- Ttitanium oxide
- Water
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry