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Elmet Technologies

Schott Sapphire Optical Window
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Sapphire, as one of the hardest, most durable and scratch resistant materials, offers a broad transmission range from UV to mid infrared wavelengths (250 – 5000 nm). It is able to withstand extreme environmental conditions and temperature changes. SCHOTT offers sapphire windows in different supply forms, dimensions, and in customized processing stages.Material:
  • Extreme hardness & high mechanical strength (withstands extreme environmental conditions)
  • Excellent thermal conductivity/heat resistance
  • High transmittance (UV to IR)
  • Low dn/dT
  • High electrical resistance (10e14 Ohm-cm)
  • High dielectric constant (9.39 from 1.0 MHz to 8.5 GHz)
Applications:
  • Infrared applications (e. g. radiometry, guidance, gas analysis, medicine, safety and security)
  • High-pressure and shock-loading applications (e.g. chamber or heater windows in chemical process equipment)
  • Optical applications (e.g. optical components from UV to IR)
  • Scratchproof sapphire watch glasses
Advantages:
  • SCHOTT offers sapphire material in optical quality
  • Customized characteristics concerning dimensions and shapes (round, square, and more, diameters up to 300 mm)
  • Polished surface and customized coating for different applications
  • Best Practice in sapphire processing due to long term experiences from handling optical materials
  • Usage of most advanced equipment and state-of-the-art metrology for manufacturing and quality control

Information provided by SCHOTT.

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 3.98 g/cc0.144 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Knoop 1525 - 20001525 - 2000
Hardness, Mohs 9.09.0
Tensile Strength at Break 276 - 414 MPa40000 - 60000 psi
Modulus of Elasticity 345 GPa50000 ksi
Flexural Strength 483 - 896 MPa70000 - 130000 psi
Flexural Modulus 35.9 GPa5200 ksi
Compressive Modulus 37.9 GPa5500 ksi
Bulk Modulus 241 GPa35000 ksi
Poissons Ratio 0.290.29
Shear Modulus 148 GPa21500 ksi
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity  1.00e+6 ohm-cm
@Temperature 1000 °C
1.00e+6 ohm-cm
@Temperature 1830 °F
 1.00e+11 ohm-cm
@Temperature 500 °C
1.00e+11 ohm-cm
@Temperature 932 °F
 1.00e+16 ohm-cm
@Temperature 25.0 °C
1.00e+16 ohm-cm
@Temperature 77.0 °F
Dielectric Constant 9.49.4E perpendicular to c-axis
 11.511.5E parallel to c-axis
Dielectric Strength 48.0 kV/mm1220 kV/in
Dissipation Factor 0.000100.00010
 
Thermal PropertiesMetricEnglishComments
CTE, linear 8.40 µm/m-°C
@Temperature 25.0 - 800 °C
4.67 µin/in-°F
@Temperature 77.0 - 1470 °F
Specific Heat Capacity 0.774 J/g-°C0.185 BTU/lb-°F
Thermal Conductivity 27.21 W/m-K188.8 BTU-in/hr-ft²-°F
Melting Point 2040 °C3700 °F

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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