Schott Glass 8347 Borosilicate Glass

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Schott Glass 8347 Borosilicate Glass
Categories:	Ceramic; Glass
Material Notes:	Borosilicate glass 3.3 acc. To ISO 3585, chemically and thermally highly resistant, highly UV-transmitting The heavy metal content for the elements lead, cadmium, mercury, and hexavalent chromium is less than 100 ppm 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. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	2.23 g/cc @Temperature 25.0 °C

Chemical Properties	Original Value	Comments
Acid Class, SR	1	DIN 12116
Alkali Class, AR	2	ISO 695

Mechanical Properties	Original Value	Comments
Modulus of Elasticity	63.0 GPa
Poissons Ratio	0.20
Shear Modulus	26.3 GPa	Calculated

Electrical Properties	Original Value	Comments
Volume Resistivity	3.20e+6 ohm-cm @Temperature 350 °C
	1.00e+8 ohm-cm @Temperature 250 °C
Dielectric Constant	4.6 @Frequency 1e+6 Hz, Temperature 25.0 °C
Dielectric Loss Index	0.0037 @Frequency 1e+6 Hz, Temperature 25.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	3.30 µm/m-°C @Temperature 20.0 - 300 °C	ISO 7991
Thermal Conductivity	1.20 W/m-K @Temperature 90.0 °C
Transformation Temperature, Tg	525 °C	ISO 7884-8
Softening Point	825 °C	Viscosity 10^7.6 dPa s; ISO 7884-3
Working Point	1260 °C	Viscosity 10⁴ dPa s; ISO 7884-2
Annealing Point	560 °C	Viscosity 10¹³ dPa s; ISO 7884-4

Optical Properties	Original Value	Comments
Refractive Index	1.473 @Wavelength 587.6 nm
UV Transmittance	<= 70 % @Thickness 1.00 mm, Wavelength 254 nm

Descriptive Properties
Hydrolytic Resistance	Class HGB 1	ISO 719
Stress-optical Coefficient K (10^-6mm²N^-1)	4	DIN 52314
t_k100(°C)	250

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CSGS924 / 162029

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