Advices for the use of ZERODUR at higher temperatures

Ralf Jedamzik; Thomas Westerhoff

doi:10.1117/12.2311648

10 July 2018 Advice for the use of ZERODUR at higher temperatures

Ralf Jedamzik, Thomas Westerhoff

Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III; 1070634 (2018) https://doi.org/10.1117/12.2311648
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The coefficient of thermal expansion of ZERODUR^® is optimized for an application temperature between 0°C to 50°C. Nevertheless ZERODUR^® can also be used at other temperatures. It has been shown elsewhere, that ZERODUR^® can be used at deep, down to cryogenic temperatures. At higher temperatures, the use of ZERODUR^® is restricted by the required accuracy of the coefficient of thermal expansion. As given in the ZERODUR^® catalog, the maximum application temperature is 600°C. Slight changes of the CTE may occur if ZERODUR^® is cooled down from application temperatures between 130°C and 320°C with rates that differ from the initial production annealing rate. This can be relevant in coating processes that work at temperatures above 130°C. In this paper, the effects of high temperature treatments on ZERODUR^® properties are discussed. Advices are given how to avoid material property or geometric changes if heat treatment cannot be avoided.

Citation Download Citation

Ralf Jedamzik and Thomas Westerhoff "Advice for the use of ZERODUR at higher temperatures", Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 1070634 (10 July 2018); https://doi.org/10.1117/12.2311648

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available