ZERODUR® uniquely combines the properties of glass and ceramics, making it ideal for high-precision applications in research and development.

Developed by Schott AG in 1956, it has since proven itself in use under extreme conditions, such as those prevalent in astronomy.
The glass-ceramic material is produced under controlled volume crystallization and the resulting residual glass and crystalline phase determine the exceptional material behaviour.

ZERODUR® is characterized by good material homogeneity, chemical resistance and long-term stability.

A special feature is its zero expansion in the event of temperature fluctuations, resulting in hardly any fluctuating mechanical properties.
These special features make ZERODUR® ideal as a substrate material for optical elements in comet probes, as a mirror substrate for large astronomical telescopes and other applications in precision optics and measurement technology.