|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|6457468||1420664||2017||5 صفحه PDF||سفارش دهید||دانلود کنید|
- Spectral hemispherical reflectivity measured for CeO2âÎ´, with Î´ in the range 0-0.0377.
- Spectroscopic measurements covered the wavelength range 300-2800Â nm.
- Sample with interconnected Î¼m-sized pores shows similar selectivity.
- Empirical correlation derived for the total hemispherical reflectivity.
Nonstoichiometric ceria, CeO2-Î´, has emerged as a promising redox material for thermochemically splitting H2O and CO2 using concentrated solar energy. Knowledge of its radiative properties is crucial for the design of efficient solar reactors. Samples of various nonstoichiometries (0â¤Î´â¤0.0377) were prepared by thermal reduction in a thermogravimetric analyzer at high temperatures (Tâ¥1473Â K) and under low oxygen partial pressures (pO2â¤2.5Â·10â4Â atm). The spectral hemispherical reflectivity was measured using a spectroscopic goniometry system in the spectral range 300-2800Â nm. A porous ceria sample with interconnected Âµm-sized pores showed comparable selectivity because of its high optical thickness. The total hemispherical reflectivity was computed for emission temperatures in the range 900-6000Â K relevant to solar reactors.
Journal: Solar Energy Materials and Solar Cells - Volume 159, January 2017, Pages 167-171