Crystal structure and optical properties of YMnO₃ compound with high near-infrared reflectance

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• 作者：Aijun Han ; ^{haj@mail.njust.edu.cn} ; Minchun Zhao ; Mingquan Ye ; Juanjuan Liao ; Zhimin Zhang ; Nan Li
• 关键词：YMnO3 ; NIR reflectance ; Sol&ndash ; gel ; Cool pigments
• 刊名：Solar Energy
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：91
• 期：Complete
• 页码：32-36
• 全文大小：328 K

文摘

The new application of YMnO₃ as a high near-infrared (NIR) reflective inorganic pigment has been developed. Single-phased perovskite nanocrystalline YMnO₃ samples with different average sizes have been synthesized through a polyacrylamide gel route. With the calcination temperature increasing from 700 ¡ãC to 900 ¡ãC, the color of the samples is blue-green, and the broad band value decreases from 1.89 to 1.58 eV due to the O_2p-Mn_3d charge-transfer transition. The NIR reflectance and solar reflectance values of corresponding pigmented coating increase from 51.4 % to 53.4 % and from 23.9 % to 32.5 % , respectively, which are higher than that of commercially available roofing products of the same color. The prepared YMnO₃ pigment can be well served as colored ¡°cool colorant¡±.