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Tuning the spectral emittance of α-SiC open-cell foams up to 1300 K with their macro porosity
Maud Aronovici, Giovanni Bianchi, Luca Ferrari, Maurizio Barbato, Sandro Gianella, Giulio Scocchi, and Alberto Ortona, Journal of the American Ceramic Society 98(8), 2625 (2015).
Michael Scheffler and Paolo Colombo, Cellular ceramics: structure, manufacturing, properties and applications (John Wiley & Sons, 2006).
Cyril Caliot, Gilberto Domingues, Gilles Flamant, Benoit Rousseau, Jerome Vicente, and Simon Guevelou, Journal of Porous Media 18(10), (2015).
M. T. Ta, J. Y. Rolland, P. Echegut, B. Rousseau, M. Zaghrioui, F. Giovannelli, H. Gomart, P. Lenormand, and F. Ansart, Applied Physics Letters 97(18), 181917 (2010).
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A simple and robust analytical model is used to finely predict the spectral emittance under air up to 1300 K of α-SiC open-cell foams constituted of optically thick struts. The model integrates both the chemical composition and the macro-porosity and is valid only if foams have volumes higher than their Representative Elementary Volumes required for determining their emittance. Infrared emission spectroscopy carried out on a doped silicon carbide single crystal associated to homemade numerical tools based on 3D meshed images (Monte Carlo Ray Tracing code, foam generator) make possible to understand the exact role of the cell network in emittance. Finally, one can tune the spectral emittance of α-SiC foams up to 1300 K by simply changing their porosity.
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