RESEARCH ON SUBMICRON METAL-FIBER SOLUTIONS.
Final rept. 1 Mar-30 Nov 67,
MELPAR INC FALLS CHURCH VA
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The program is a study of possible mechanisms for use in a fast-acting, variable-density filter for high intensity flash protection. Fibers of boehmits, silicon carbide, and snapphire, with and without metal coatings, were dispersed in amyl acetate-toluene mixture, observed in an electro-optical test cell. Absorption spectra and light scattering measurements did not show a strong, specific absorption at a wavelength twice the fiber length. Discussion of theoretical results suggests such absorption is not to be expected. Experiments with electrochromic cells revealed that high-voltage activation is effective mostly through gas generation rather than oxidation of leuco dye. The two processes are almost equally efficient. To develop a workable flash-protection device, the use of a combined gas-bubbleelectrochromic cell appears most promising. Author
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