Glass Ceramics has a very low thermal expansion rate, so it is essential for a large number of demanding high-tech applications that require extremely high accuracy.

Zerodur glass-ceramic has always been one of Schott's most unique and extraordinary products.
Due to its extremely low thermal expansion rate, it is essential for a large number of demanding high-tech applications requiring extremely high precision.

OHARA CLEARCERAM-Z is a kind of microcrystalline glass with ultra-low coefficient of thermal expansion
This material was developed by ohara based on high uniform melting and precise crystallization.