Schott GS25 Transition Glass

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Schott GS25 Transition Glass
Categories:	Ceramic; Glass
Material Notes:	SCHOTT glass no. 8218. Used as a sealing glass for various electronic components and fiber optics. The heavy metal content for the elements lead, cadmium, mercury, and hexavalent chromium is below 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	2.21 g/cc	DIN 66137-2

Electrical Properties	Original Value	Comments
Volume Resistivity	1.0e+9 ohm-cm @Temperature 350 °C
	5.0e+10 ohm-cm @Temperature 250 °C

Thermal Properties	Original Value	Comments
CTE, linear	2.65 µm/m-°C @Temperature 20.0 - 300 °C	ISO 7991
Softening Point	1055 °C	Viscosity 10^7.6 dPa s; ISO 7884-3
Working Point	1605 °C	Viscosity 10⁴ dPa s; ISO 7884-2
Annealing Point	640 °C	Viscosity 10¹³ dPa s; ISO 7884-4
Strain Point	565 °C	Viscosity 10^14.7 dPa s; ISO 7884-4

Descriptive Properties
t_k100(°C)	440

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CSGS946 / 254984

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