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Full Record for Micrograph 542
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- Micrograph no
- 542
- Brief description
- Devitrified Glass: glass sample heated at 900°C for 17 hours.
- Keywords
- ceramic
, devitrification , glass , silica - Categories
- Ceramic
- System
- SiO2
- Composition
- Mostly silica, SiO2
- Standard codes
- Reaction
- Processing
- Flat glass is produced using the Float Glass Process. Samples were heated at 900°C for 17 hours to induce devitrification.
- Applications
- Sample preparation
- Thin section
- Technique
- Transmitted polarised light microscopy, with sensitive tint plate
- Length bar
- 100 μm
- Further information
- During the devitrification process, the glass changes from being completely amorphous to partially crystalline, as it adsorbs moisture from the atmosphere. Devitrified glass has a frosty or cloudy, iridescent appearance. Devitrification occurs naturally over long periods of time, but can be induced by heating to high temperatures for prolonged periods of time.
- Contributor
- Dr K M Knowles
- Organisation
- Department of Materials Science and Metallurgy, University of Cambridge
- Date
- 01/10/02
- Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales- Related micrographs