摘要
用红外光谱仪测定光洁金属表面反射率谱,再根据Kramers-Kronig积分式和Fresnel方程,计算出几种金属表面的折射率n(ω)和消光系数κ(ω),然后使用n(ω),κ(ω)和Mcmahon关系式求出全波长方向发射率(0～90°).与用'全波长方向发射率测定装置'测定的结果的比较表明,在0°～60°的范围内两者基本一致.本文提出的方法克服了在实验上获得材料表面大角度方向发射率的困难.
A new method to get the directional emissivities (0~90° has been presented. The optical constants (including the refractive index and the extinction coefficient) of some metals were numerically determined by applying experimental data of spectra reflectivity and the Kramers-Kronig relations and Fresnel reflect equation, and so the directional emissivity can then be calculated. The numerical data were compared to the experimental results of directional emissivities which were mea-sured with the Directional Emissivity Measuring Equipment (only 0~60°is available). The feasibility of the calculational methods can be confirmed by their accordance. The experiments deficiency in getting values more than 60°can be overcome by this method.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2002年第3期319-331,共13页
Chinese Journal of Materials Research
基金
国家自然科学基金资助项目59476023.
