Corning® PYROCERAM® Glass Ceramic

Glass Type: Glass Ceramics


Corning® PYROCERAM® is a transparent glass-ceramic having almost a zero thermal expansion. It is an excellent choice for applications when there is the probability of high heat and cold shock. PYROCERAM® is widely used for residential applications such as fireplace and wood burning stove windows, oven windows, broiler windows and other such appliances. PYROCERAM® is also used in architectural and outdoor lighting, electronics, UV light-wave blocking applications and chemical process sight glass.

Thermal PropertiesMechanical Properties
Thermal Coefficient of Expansion0± 3.0 x 10-7 K-1Density2.51 g/cm3 (at 20°C/68°F)
Annealing Point547°C/ 1017° FKnoop Hardness705 kg/mm2
Softening PointN/AYoung's Modulus94.3 Gpa
Strain Point700°C/ 1292° FPoisson's Ratio0.25
Chemical PropertiesElectrical Properties
Hydrolytic ResistanceClass1Dielectric ConstantE=8.1 MHz @R.T.
Acid ResistanceClass1Resistivitylog10 ρ 6.8 at 250° C (482°F)
Alkali ResistanceClass1Dielectric StrengthN/A
Optical Properties
Refractive Index1.55