RESEARCH PAPERS: Radiative Transfer

Pigments to Reflect the Infrared Radiation From Fire

[+] Author and Article Information
P. Berdahl

Energy & Environment Division, Lawrence Berkeley Laboratory, Berkeley, CA 94720

J. Heat Transfer 117(2), 355-358 (May 01, 1995) (4 pages) doi:10.1115/1.2822529 History: Received April 01, 1994; Revised August 01, 1994; Online December 05, 2007


Conventional paints transmit or absorb most of the intense infrared radiation emitted by fire, a fact that contributes to the spread of fire. Techniques used for design of coatings with high visible reflectivity are here adapted to the design of coatings that have high reflectivity in the 1 to 8 μm wavelength range important in fires. Promising materials for pigments include titanium dioxide, iron oxide, chromium oxide, and silicon, with particle diameters in the 1 to 2 μm range. Aluminum flake pigments are also effective. Pigment synthesis by the deposition of coatings on mica flakes is briefly discussed.

Copyright © 1995 by The American Society of Mechanical Engineers
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