Translator Disclaimer
27 April 2009 Low-thermal expansion infrared glass ceramics
Author Affiliations +
Abstract
L2 Tech, Inc. is in development of an innovative infrared-transparent glass ceramic material with low-thermal expansion (<0.5 ppm/°C) and high thermal-shock resistance to be used as windows and domes for high speed flight. The material is an inorganic, non-porous glass ceramic, characterized by crystalline phases of evenly distributed nano-crystals in a residual glass phase. The major crystalline phase is zirconium tungstate (ZrW2O8) which has Negative Thermal Expansion (NTE). The glass phase is the infrared-transparent germanate glass which has positive thermal expansion (PTE). Then glass ceramic material has a balanced thermal expansion of near zero. The crystal structure is cubic and the thermal expansion of the glass ceramic is isotropic or equal in all directions.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philip Lam "Low-thermal expansion infrared glass ceramics", Proc. SPIE 7302, Window and Dome Technologies and Materials XI, 730211 (27 April 2009); https://doi.org/10.1117/12.818979
PROCEEDINGS
7 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Light fiber for mean infrared
Proceedings of SPIE (April 13 2003)
Development of bulk heavy-metal fluoride glass optics
Proceedings of SPIE (December 05 1993)
Development Of IR Optical Fibers In Japan
Proceedings of SPIE (May 11 1986)
The Need For Better Optical Materials
Proceedings of SPIE (December 25 1984)
Current and Emerging Materials for 3-5 Micron IR Transmission
Proceedings of SPIE (December 18 1986)

Back to Top