A novel physical approach based on relative mutual independence of absorption and scattering properties of weakly-absorbing materials is formulated. The resulting simplifications in both experimental characterization and theoretical modeling of spectral properties of dispersed materials are discussed in some details. The suggested approach is verified using the published experimental data for materials of different nature. It is shown that the methods developed enable us to simplify radically the identification procedure for material properties, determine extremely low absorption coefficients of the bulk substance from the measurements for highly-scattering porous material, and estimate the effect of non-uniform distribution of adsorbed water on scattering characteristics of nano-porous super-insulations.

Volume Subject Area:
Fundamentals of Heat and Mass Transfer
Topics:
Absorption, Electromagnetic scattering, Experimental characterization, Materials properties, Modeling, Porous materials, Radiation scattering, Scattering (Physics), Transparency, Water
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Copyright © 2011
 by ASME
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