Determination of Exfoliated Vermiculite Scattering and Absorption Coefficients Jointly by Modeling and Experimental Methods
https://doi.org/10.56304/S2304487X21030111
Abstract
Experimental results for the extinction coefficient of exfoliated vermiculite determined by the FT-IR technique in the wavelength range from 1.33 to 27 μm are reported. The samples for the experiments have been prepared by dissolving particles of exfoliated vermiculite in IR transparent salt KBr of four different fractions (less than 60 μm, from 60 to 100 μm, from 100 to 150 μm and from 150 to 200 μm) and three mass concentrations (approximately 0.1, 0.2, and 0.3 %). The spectral scattering coefficient has been determined by the statistical modeling method of incident radiation scattering by particle (angle and point of incidence are set randomly by a uniform distribution and a particle linear size is set randomly by a normal distribution in fraction limits), which can be presented as one of three geometrical bodies: cylinder, sphere and rectangular parallelepiped, and using classical optics formulas. The spectral absorption coefficient obtained in our previous study has been refined from the experimental extinction coefficient. The Planck integral values of these coefficients and the Rosseland absorption coefficient have been calculated. Extinction coefficients have been theoretically evaluated to compare three proposed particle models on the best accordance with the results of jointly experiment and modeling.
About the Authors
A. V. Skurikhin
National Research University “Moscow Power Engineering Institute”
Russian Federation
Russian Federation
111250
Moscow
A. V. Kostanovsky
National Research University “Moscow Power Engineering Institute”; Joint Institute for High Temperatures Russian Academy of Sciences
Russian Federation
Russian Federation
111250
125412
Moscow
S. K. Belus
Institute of Chemical Reagents and High Purity Chemical Substances, National Research Center Kurchatov Institute
Russian Federation
Russian Federation
107076
Moscow
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Review
For citations:
Skurikhin A.V., Kostanovsky A.V., Belus S.K. Determination of Exfoliated Vermiculite Scattering and Absorption Coefficients Jointly by Modeling and Experimental Methods. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2021;10(3):195-207. (In Russ.) https://doi.org/10.56304/S2304487X21030111
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