HTW Germany

HTW Hochtemperatur-
Werkstoffe GmbH

Tel.: +49 (0)8271 81 86 10
Fax: +49 (0)8271 73 72

Glass Industry

Glassy carbon SIGRADUR® is an ideal material for components in the glass industry. Glassy carbon SIGRADUR® is high temperature resistant in inert gas or vacuum up to 3000°C. Unlike all other ceramic and metallic high temperature materials, glassy carbon increase in strength with a rise in temperature up to 2700 K. It shows at 2700 K compared to room temperature the double strength. Glassy carbon has an extremely high resistance to thermal shock. Therefore short heating and cooling times are possible without any problems. Glassy carbon shows no wetting by molten glass. Due to the hard and smooth surface glassy carbon doesn’t show any particle generation like other carbon materials which would cause contaminations. Further advantages are the smooth surface, low thermal conductivity and low thermal expansion.