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Rulon Bearings

Schott Glass 8531 Soft Glass
Categories: Ceramic; Glass
Material Notes: Soft glass, free from Na, of high lead content, high dielectric constant

Encapsulation of semiconductor components at low temperature (diodes)

Information provided by SCHOTT AG.
Vendors: SCHOTT with its Business Unit Tubing offers tailor-made products & services worldwide from more than sixty special glass types for international growth markets such as industrial and environmental technology, electronics, display industry, architecture and design as well as pharmaceuticals. Contact us.

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Physical PropertiesMetricEnglishComments
Density 4.31 g/cc
@Temperature 25.0 °C		0.156 lb/in³
@Temperature 77.0 °F
 
Chemical PropertiesMetricEnglishComments
Acid Class, SR 44DIN 12116
Alkali Class, AR 33ISO 695
 
Mechanical PropertiesMetricEnglishComments
Modulus of Elasticity 52.0 GPa7540 ksi
Poissons Ratio 0.240.24
Shear Modulus 21.0 GPa3050 ksiCalculated
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity  6.30e+9 ohm-cm
@Temperature 350 °C		6.30e+9 ohm-cm
@Temperature 662 °F
 1.00e+11 ohm-cm
@Temperature 250 °C		1.00e+11 ohm-cm
@Temperature 482 °F
Dielectric Constant 9.5
@Frequency 1e+6 Hz,
Temperature 25.0 °C		9.5
@Frequency 1e+6 Hz,
Temperature 77.0 °F
Dielectric Loss Index 0.00090
@Frequency 1e+6 Hz,
Temperature 25.0 °C		0.00090
@Frequency 1e+6 Hz,
Temperature 77.0 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear 9.10 µm/m-°C
@Temperature 20.0 - 300 °C		5.06 µin/in-°F
@Temperature 68.0 - 572 °F		ISO 7991
Thermal Conductivity 0.700 W/m-K
@Temperature 90.0 °C		4.86 BTU-in/hr-ft²-°F
@Temperature 194 °F
Transformation Temperature, Tg 435 °C815 °FISO 7884-8
Softening Point 585 °C1090 °FViscosity 107.6 dPa s; ISO 7884-3
Working Point 820 °C1510 °FViscosity 104 dPa s; ISO 7884-2
Annealing Point 430 °C806 °FViscosity 1013 dPa s; ISO 7884-4
 
Optical PropertiesMetricEnglishComments
Refractive Index 1.70
@Wavelength 587.6 nm		1.70
@Wavelength 587.6 nm
 
Descriptive Properties
Hydrolytic ResistanceClass HGB 1ISO 719
Stress-optical Coefficient K (10-6mm2N-1)2.2DIN 52314
tk100(°C)450

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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