Facile fabrication of cool yellow pigment with enhanced NIR reflectance by tailoring oxygen defects and its application in energy-saving building

Intensity of absorption tail at long wavelength side of absorption edge is affected by concentration of oxygen vacancy (Ov), which determines chromaticity, near-infrared (NIR) reflectance and application value of cool pigments. In this work, a feasible strategy is proposed to restrain the generation...

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Bibliographic Details
Published inCeramics international Vol. 49; no. 7; pp. 10756 - 10764
Main Authors Zou, Jian, Chen, Yongpan, Lin, Hua
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.04.2023
Subjects
Cool pigments
Lattice distortion
NIR reflectance
Oxygen defects
Perovskite oxide
Oxygen defects
Lattice distortion
NIR reflectance
Perovskite oxide
Cool pigments
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Summary:Intensity of absorption tail at long wavelength side of absorption edge is affected by concentration of oxygen vacancy (Ov), which determines chromaticity, near-infrared (NIR) reflectance and application value of cool pigments. In this work, a feasible strategy is proposed to restrain the generation of Ov by lattice distortion to enhance color and NIR reflectance. Compression lattice is formed by introducing smaller ions of Ti4+ or Zr4+ into Tb site in SrTbO3 host. This results in significant reduction of concentration of Ov. Compared to SrTbO3, color component L* of SrTb0.6Zr0.4O3 increases from 69.09 to 87.30. Moreover, NIR and solar reflectance are remarkably enhanced, reaching 18.3% and 19.3%, respectively. In addition, 11.6 °C and 5.6 °C decreases in temperature were observed for inner surface of roof and indoor room of simulation house. The strategy proposed in this work will contribute to developing color-cool pigments with suitable properties and high solar regulation ability.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2022.11.268