Glass Ceramic

Name:
Glass Ceramic
Detailed information:
A devitrified or crystallized form of glass whose properties can be made to vary over a wide range.

Properties:

Rupture modulus up to 50,000 psi, d 2.5, thermal shock resistance 900C, highest continuous-use temperature 700C. Glass ceramics lie between borosilicate glasses and fused silica in high-temperature capability.

Derivation:

A standard glass formula to which a nucleating agent, such as titania, has been added, is melted, rolled into sheet, and cooled. It is then heated to a temperature at which nucleation occurs, causing formation of crystals.

Use:

Range and stove tops, laboratory bench tops, architectural panels, restaurant heating and warming equipment, telescope mirrors.

See Nucleation; “Pyroceram” Brand 9608 [Corning]; “Cer-Vit” [Owens-Corning]