Ta, Minh Tri and Rolland, Julien-Yves and Echegut, Patrick and Rousseau, Benoit and Zaghrioui, Mustapha and Giovannelli, Fabien and Gomart, Hector and Lenormand, Pascal and Ansart, Florence Prediction of thermal radiative properties (300–1000 K) of La2NiO4+δ ceramics. (2010) Applied Physics Letters, vol. 97 (n° 18). pp. 181917-1. ISSN 0003-6951
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Official URL: http://dx.doi.org/10.1063/1.3511344
A multiscale numerical model is developed to predict the thermal radiative properties (TRP) of rough La2NiO4+δ coatings. The model integrates intrinsic and extrinsic contributions related to the chemical composition and the texture, respectively. High-temperature infrared reflectivity and thermogravimetric measurements on a La2NiO4+δ single crystal make it possible to understand the role of the excess oxygen in the intrinsic TRP. We show that dense ceramics with thicknesses higher than 4 μm are optically thick, and that one can adjust the surface roughness parameters to predict their TRP.
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