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Prediction of thermal radiative properties (300-1000 K) of La2NiO4+δ ceramics
被引:7
|作者:
Ta, M. T.
[1
]
Rolland, J. Y.
[1
]
Echegut, P.
[1
]
Rousseau, B.
[1
]
Zaghrioui, M.
[2
]
Giovannelli, F.
[2
]
Gomart, H.
[3
]
Lenormand, P.
[4
]
Ansart, F.
[4
]
机构:
[1] CNRS, CEMHTI, UPR 3079, F-45071 Orleans, France
[2] IUT Blois, LEMA, CNRS, UMR 6157, F-41029 Blois, France
[3] Ecole Cent Paris, EM2C, CNRS, UPR 288, F-92295 Chatenay Malabry, France
[4] Univ Toulouse 3, CIRIMAT, CNRS, UMR 5085, F-31062 Toulouse, France
关键词:
OPTICAL CONDUCTIVITY;
TRANSPORT-PROPERTIES;
SINGLE-CRYSTAL;
OXIDES;
SPECTRA;
D O I:
10.1063/1.3511344
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
A multiscale numerical model is developed to predict the thermal radiative properties (TRP) of rough La2NiO4+delta 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+delta 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 mu m are optically thick, and that one can adjust the surface roughness parameters to predict their TRP. (c) 2010 American Institute of Physics. [doi:10.1063/1.3511344]
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