Schott RayVolution® D99 Sodium-Potassium-Barium-Silicate Glass

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Schott RayVolution® D99 Sodium-Potassium-Barium-Silicate Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	Highly UV-transmitting. Used as envelope for germicidal lamps (low pressure mercury vapor discharge lamps) and for UV detectors. The heavy metal content of 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	2.52 g/cc @Temperature 25.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	9.90 µm/m-°C @Temperature 20.0 - 300 °C	ISO 7991
Transformation Temperature, Tg	480 °C	ISO 7884-8
Softening Point	675 °C	Viscosity 10^7.6 dPa s; ISO 7884-3
Working Point	995 °C	Viscosity 10⁴ dPa s; ISO 7884-2
Annealing Point	490 °C	Viscosity 10¹³ dPa s; ISO 7884-4

Optical Properties	Original Value	Comments
Refractive Index	1.506 @Wavelength 587.6 nm
UV Transmittance	>= 75 % @Thickness 1.00 mm, Wavelength 254 nm

Descriptive Properties
Acid Resistance	Class S2	DIN 12116
Alkali Resistance	Class A3	ISO 695
Hydrolytic Resistance	Class HGB 5	ISO 719

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CSGS948 / 291336

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