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Schott ROBAX® Glass Ceramic

Category Ceramic , Glass , Glass Ceramic , Optical
Manufacturer Schott North America
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
ROBAX® is a highly transparent glass-ceramic having virtually zero thermal expansion and sufficient mechanical resistance required for all standard applications. It is produced in flat, rolled sheets.As a result of its extremely low thermal expansion, ROBAX® can be subjected to extreme temperature differences. Even when used in high temperature conditions, ROBAX® maintains excellent stability of form. ROBAX® can be further processed mechanically using all of the normal methods of glass processing.Applications: ROBAX® possesses a high degree of resistance against thermal stresses and chemical surface attacks. Its diverse range of applications include: chemical process sight glass, high temperature vision windows, heat insulators, commercial ovens/broilers, architectural and outdoor lighting, electronics and UV light wave blocking applications.Information provided by SCHOTT North America.
Physical Properties Metric English Comments
Density 2.56 g/cc
0.0925 lb/in³
Mechanical Properties Metric English Comments
Modulus of Elasticity 92.0 GPa
13300 ksi
Poissons Ratio 0.25
0.25
Shear Modulus 36.8 GPa
5340 ksi
Calculated
Thermal Properties Metric English Comments
CTE, linear -0.300 - 0.300 µm/m-°C

@Temperature 20.0 - 700 °C
-0.167 - 0.167 µin/in-°F

@Temperature 68.0 - 1290 °F
Specific Heat Capacity 0.800 J/g-°C

@Temperature 20.0 - 100 °C
0.191 BTU/lb-°F

@Temperature 68.0 - 212 °F
Thermal Conductivity 1.60 W/m-K

@Temperature 90.0 °C
11.1 BTU-in/hr-ft²-°F

@Temperature 194 °F
Maximum Service Temperature, Air 680 °C
1260 °F
100 to 10,000 hr, depends on temperature gradient
760 °C
1400 °F
<100 hr, depends on temperature gradient
Optical Properties Metric English Comments
Transmission, Visible 90 %
90 %
transparent; thickness not quantified
Electrical Properties Metric English Comments
Volume Resistivity >= 250000 ohm-cm

@Temperature 350 °C
>= 250000 ohm-cm

@Temperature 662 °F
>= 6.30e+6 ohm-cm

@Temperature 250 °C
>= 6.30e+6 ohm-cm

@Temperature 482 °F
1.00e+8 ohm-cm

@Temperature 175 °C
1.00e+8 ohm-cm

@Temperature 347 °F
Dielectric Constant 7.8
7.8
Dissipation Factor 0.019
0.019
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