ZERODUR® glass ceramic from SCHOTT is an inorganic, non-porous, lithium aluminium silicon oxide material made by a process of controlled volume crystallization. It contains a crystallized phase and a rest glass phase which together create the unique properties of this exceptional material.
ZERODUR® glass block
Unlike glass materials, ZERODUR® has an ultra low coefficient of thermal expansion (CTE), which even can become zero or slightly negative at some temperatures. This is even much lower than the CTE of quartz glass. Another unique characteristic of ZERODUR® low expansion glass ceramic is its exceptional good homogeneity. Even in large ZERODUR® material blocks, the fluctuations of mechanical and thermal properties are nearly not measurable. A good transparency in the range of about 400 - 2.300 nm allows a verification of the inner quality of the ZERODUR® raw material. Therefore, it can be ensured, that neither bubbles nor inclusions are undetected. Our company uses different available grades of ZERODUR® glass ceramic to manufacture substrates for high quality optics used for high-end applications in research, science, industry, space technology and astronomy. But also for the design of length standards, large telescope mirror projects, laser cavity systems, as well as for the design of mechanical components for fiber optics, that might not change their length when exposed to temperature changes, ZERODUR® high performance glass ceramic is an ideal material choice.
Our company is machining all kind of optics for a broas range of applications from these very interesting glass ceramic materials. In order to request a quotation for a finished part made of original ZERODUR® zero expansion glass from SCHOTT at custom dimensions, please use the button below:
Electrical resistivity (at 20 °C)
For further detailed specifications and additional data of ZERODUR®, please use our information request page.
All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on specifications"