การสังเคราะห์สีผงเซรามิกสีแดงสะท้อนรังสีอินฟราเรดใกล้

Pattana Rakkwamsuk; Sitthisuntorn Supothina; Lada Pansukhumthana; Teerasak Tangkittimasak

doi:10.60136/bas.v8.2019.254

Authors

Pattana Rakkwamsuk School of Energy, Environment and Materials, KMUTT
Sitthisuntorn Supothina NECTEC
Lada Pansukhumthana Department of Science Service
Teerasak Tangkittimasak School of Energy, Environment and Materials, KMUTT

DOI:

https://doi.org/10.60136/bas.v8.2019.254

Keywords:

Coral red pigment, Solar reflective pigment, Near-infrared reflective pigment, Complex inorganic compound pigment

Abstract

This paper presents the research and development of red ceramic pigment synthesized by solid-state reaction of zircon doped with iron oxide, aluminium oxide and silicon dioxide that formed complex inorganic compound pigment. The pigment offered shades of coral red and high reflectivity in the near-infrared (NIR) region. The pigment can be used as a vehicle for a high solar reflective coating that reduces heat absorbed by building structures, promotes energy conservation in an air-conditioning system, and enhance human thermal comfort in the building.

The synthesis was performed by ball-milling raw materials composed of ZrSiO₄ Fe₂O₃ Al₂O₃and SiO₂. The compound of ZrSiO₄ Fe₂O₃ Al₂O₃and SiO₂ at the ratio of 45:25:(30-x):x, where x varied between 0 and 30 wt%, was calcined at 1,100, 1,200 and 1,300 °C. The calcined compound was then washed, oven-dried and ground, that yielded powdered pigment with the shade of brown. The color of pigments, measured and computed in compliance with CIE L* a* b*, did not alter as the calcining temperature changed but had a brighter shade of coral red as the quantity of SiO₂ increased. It was found that the pigment synthesized from ZrSiO₄:Fe₂O₃:Al₂O₃:SiO₂ at 45:25:20:10 and calcined at 1,100 °C offered the highest NIR reflectance at 65.9 %

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