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Schott Dark ROBAX® Glass Ceramic

Category Ceramic , Glass , Glass Ceramic , Optical
Manufacturer Schott North America
Trade Name Dark ROBAX®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Dark ROBAX® is an infra-red transparent glass-ceramic having virtually zero thermal expansion and sufficient mechanical resistance required for all standard applications. It is produced in rolled sheets with one surface flat and one surface textured with nubs. As a result of its extremely low thermal expansion, Dark ROBAX® can be subjected to extreme temperature differences. Even when used in high temperature conditions, Dark ROBAX® maintains excellent stability of form. Dark ROBAX® can be further processed mechanically using all of the normal methods of glass processing.Applications: Dark ROBAX® possesses a high degree of resistance against thermal stresses and chemical surface attacks. Its diverse range of applications include: high temperature vision windows for UV and visual light blocking, heat insulators, commercial heating equipment, and electronics.Information provided by SCHOTT North America.
Physical Properties Metric English Comments
Density 2.59 g/cc
0.0936 lb/in³
Mechanical Properties Metric English Comments
Modulus of Elasticity 95.0 GPa
13800 ksi
Flexural Strength 85.0 - 135 MPa
12300 - 19600 psi
Poissons Ratio 0.25
0.25
Shear Modulus 38.0 GPa
5510 ksi
Calculated
Thermal Properties Metric English Comments
CTE, linear -0.150 - 0.150 µm/m-°C

@Temperature 20.0 - 700 °C
-0.0833 - 0.0833 µin/in-°F

@Temperature 68.0 - 1290 °F
Specific Heat Capacity 0.810 J/g-°C

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

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

@Temperature 100 °C
11.1 BTU-in/hr-ft²-°F

@Temperature 212 °F
Maximum Service Temperature, Air 700 °C
1290 °F
100 to 10,000 hr, depends on temperature gradient
800 °C
1470 °F
<100 hr, depends on temperature gradient
Optical Properties Metric English Comments
IR Transmittance 90 %
90 %
transparent; thickness not quantified
Electrical Properties Metric English Comments
Volume Resistivity >= 200000 ohm-cm

@Temperature 350 °C
>= 200000 ohm-cm

@Temperature 662 °F
>= 5.00e+6 ohm-cm

@Temperature 250 °C
>= 5.00e+6 ohm-cm

@Temperature 482 °F
1.00e+8 ohm-cm

@Temperature 170 °C
1.00e+8 ohm-cm

@Temperature 338 °F
Dielectric Constant 7.8
7.8
Dissipation Factor 0.020
0.020
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