Preparation of NIR reflective brown pigment
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Publication Details
Author list: Thongkanluang T., Chirakanphaisarn N., Limsuwan P.
Publisher: Elsevier
Publication year: 2012
Volume number: 32
Start page: 895
End page: 901
Number of pages: 7
ISSN: 1877-7058
Languages: English-Great Britain (EN-GB)
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Abstract
Complex inorganic brown pigments having a high near infrared solar reflectance have been synthesized. Fe2O3 is the host component and mixtures of Sb2O3, SiO2, Al 2O3, and TiO2 were used as the guest components. Sb2O3, SiO2, Al2O 3, and TiO2 were mixed into 40 different compositions. It was found that a sample, denoted by S31, with a composition of Fe 2O3, Sb2O3, SiO2, Al 2O3, and TiO2 of 70, 10, 12, 2 and 6 wt% respectively, gives a maximum near infrared solar reflectance of 46.7%. Brown pigment colours were measured in CIE L*a*b* colour index. The S31 pigment powder was then prepared as a reflective coating material with different amounts of pigment powder from 4- 8 g in 100 g of ceramic glaze. The prepared materials were sprayed on the biscuit clay tiles for reflectance measurements. It was found that 5 g of S31 pigment powder mixed with 100 g of ceramic glaze gives the highest near-infrared reflectance value of 41.3 %. The newly synthesized pigment is a suitable ceramic roof coating for its high reflectance performance and the durability performing once the ceramic roof installed on house. ฉ 2010 Published by Elsevier Ltd.
Keywords
Brown pigment, Ceramic glaze, Near-infrared reflectance
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