کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1785971 | 1023401 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Difference of optical properties between porous alumina and sapphire using two-substrate method at elevated temperature
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report on simultaneous measurements of the emittance, transmittance and reflectance of a porous alumina under same environment at 573Â K, which has not been obtained. It is demonstrated that the correction of substrate radiation and multiple reflections is important for the accurate measurement of infrared (IR) optical properties of porous materials in a two-substrate method. We deduced the extinction, absorption and scattering coefficients of the alumina from the measured three quantities, based on the classical geometry model. The coefficients explain the difference of the IR optical properties between the alumina and the sapphire. The increasing reflectance of the alumina with thickness, unlike the sapphire, is attributed to the relatively high scattering coefficient at short wavelengths.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 13, Issue 8, October 2013, Pages 1594-1599
Journal: Current Applied Physics - Volume 13, Issue 8, October 2013, Pages 1594-1599
نویسندگان
Sangho Jeon, Dong-Hee Kang, Geun Woo Lee,