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Proceedings Paper

Glass ceramics for optical applications in the visible and infrared regions with low coefficient of thermal expansion
Author(s): Hans-Georg Krolla; Wolfgang Semar
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Paper Abstract

A glass ceramic with high transmission values up to 4.5 micrometers and with extremely low thermal expansion is presented. In addition a large variety in shaping processes, for instance blocks of large dimensions, tubes, domes, and capillaries, are addressed. Furthermore a sintered cordierite glass ceramic is presented combining a low value in relative length change, a high temperature stability and a high transparency in the visible and median range infrared region. The properties include a high Young's modulus and a high Knoop hardness relative to normal IR-glasses. The application of the powder processing technique can be used successfully to prepare fully dense, complex-shaped articles.

Paper Details

Date Published: 28 September 1994
PDF: 8 pages
Proc. SPIE 2286, Window and Dome Technologies and Materials IV, (28 September 1994); doi: 10.1117/12.187383
Show Author Affiliations
Hans-Georg Krolla, Schott Glaswerke (Germany)
Wolfgang Semar, Schott Glaswerke (Germany)


Published in SPIE Proceedings Vol. 2286:
Window and Dome Technologies and Materials IV
Paul Klocek, Editor(s)

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