Transparent SiC for mid-IR windows and domes

Jitendra Singh Goela; Raymond L. Taylor

doi:10.1117/12.187382

28 September 1994 Transparent SiC for mid-IR windows and domes

Jitendra Singh Goela, Raymond L. Taylor

Proceedings Volume 2286, Window and Dome Technologies and Materials IV; (1994) https://doi.org/10.1117/12.187382
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

Transparent (beta) -SiC has been fabricated by the pyrolysis of methyltrichlorosilane in a hot wall chemical vapor deposition reactor. Characterization of material indicates that transparent SiC is a theoretically dense, highly pure (99.9996%), highly oriented (111), (beta) -phase (cubic) material possessing high optical transmission in the wavelength region 0.5 - 6 micrometers , a high value of hardness, electrical resistivity and thermal conductivity, and a low value of thermal expansion coefficient. These properties make it a good candidate material for use as domes and windows in severe environments such as high speed missiles, laser, combustion and space systems. Important properties of transparent SiC were also compared with those of the opaque SiC to determine if optical transmission can be correlated with other material properties. A good correlation was obtained between material transmission and microstructure, crystallographic structure and electrical resistivity.

Citation Download Citation

Jitendra Singh Goela and Raymond L. Taylor "Transparent SiC for mid-IR windows and domes", Proc. SPIE 2286, Window and Dome Technologies and Materials IV, (28 September 1994); https://doi.org/10.1117/12.187382

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