ZERODUR® is a glass ceramic with an extremely low thermal expansion for demanding applications in which geometrical shape and distance changes must kept smallest possible under temperature variations. The key properties of ZERODUR® are:- Extremely low coefficient of thermal expansion (CTE) for a wide temperature range
- Excellent CTE homogeneity throughout the total volume
- Very low content of imperfections
- Wide range of precise geometrical Shapes
- Extremely smooth surface with residual roughness below 1 nm
Uses:- Stages and mirrors for lithography equipment
- Mirror substrates for segmented and monolithic large astronomical telescopes
- Ultra light weighted mirror blanks
- High precision mechanical parts, e.g. ring laser gyroscope bodies
- Reference standards for precision measurement technology and comet probes
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