SCHOTT ZERODUR®

The most important and significant properties of the optical glass ceramic ZERODUR® are the extremely small coefficient of linear thermal expansion as well as the homogeneity of this coefficient throughout the entire piece. Individual pieces of ZERODUR® (discs, plates, rods) can be supplied with a mean coefficient of linear thermal expansion α in the temperature range 0°C to 50°C in three expansion classes as follows:

Expansion Class 0	0± 0.02·10-6/K
Expansion Class 1	0± 0.05·10-6/K
Expansion Class 2	0± 0.10·10-6/K

Density (g/cm3)	2.53
Young’s Modules E (Gpa)	90
Poisson’s Ratio µ	0.24
Knoop Hardness (HK 0.1/20)	620
Expansion Coefficient a (20° -700°C) (10-6 /K)	0.2
Expansion Coefficient a (0° -50°C) (10-6 /K)	0.0 ± 0.1
Thermal Capacity cp (20°C) (J/(gK))	0.80
Thermal Conductivity 90°C (W/(mK))	1.46
Max. Application Temperature (°C)	600

WHILE EVERY ATTEMPT HAS BEEN MADE TO VERIFY THE SOURCE OF THE INFORMATION, NO RESPONSIBILITY IS ACCEPTED FOR ACCURACY OF DATA.