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Proceedings Paper

High-temperature material characterization for multispectral window
Author(s): James Park; Marvin-Ray Arida; Zahyun Ku; Woo-Yong Jang; Augustine M. Urbas
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Paper Abstract

A microwave cylindrical cavity combined with a laser has been investigated to characterize the temperature dependence of widow materials in the Air Force Research Laboratory (AFRL). This paper discusses the requirements of high temperature RF material characterizations for transparent ceramic materials, such as ALON, that can potentially be used for multispectral windows. The RF cylindrical resonator was designed and the numerical model was studied to characterize the dielectric constant of materials. The dielectric constant can be extracted from the resonant frequency shift based on the cavity perturbation method (CPM), which is sensitive to the sample size and shape. Laser heating was applied to the material under test (MUT), which could easily be heated above 1000°C by the laser irradiation, in order to conduct CPM at high temperature. The temperature distribution in a material was also analyzed to investigate the impact of the thermal properties and the sample shape.

Paper Details

Date Published: 3 May 2017
PDF: 7 pages
Proc. SPIE 10179, Window and Dome Technologies and Materials XV, 101790E (3 May 2017); doi: 10.1117/12.2262755
Show Author Affiliations
James Park, Air Force Research Lab. (United States)
Marvin-Ray Arida, Air Force Institute of Technology (United States)
Zahyun Ku, Air Force Research Lab. (United States)
Woo-Yong Jang, Air Force Research Lab. (United States)
Univ. of Dayton Research Institute (United States)
Augustine M. Urbas, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 10179:
Window and Dome Technologies and Materials XV
Brian J. Zelinski, Editor(s)

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