| Abstrakt: |
Yellowish-brown inorganic pigments having a high near infrared solar reflectance have been synthesized. In this research, Fe2O3 was used as the host component, whereas, the mixtures of Sb2O3, SiO2, Al2O3, and TiO2 were used as the guest components. The guest components were investigated over a range of 36 different compositions. The results showed that the pigment, denoted by YB32, with a composition of Fe2O3, Sb2O3, SiO2, Al2O3, and TiO2 of 65, 15, 10, 2 and 8 wt.% respectively, generated a maximum near infrared solar reflectance of 40.8% while the YB3 pigment was found to have a minimum reflectance of 29.3%. The CIE L*a*b* colour index was used to measure the yellowish-brown pigment colours. The YB32 and YB3 pigment powders were also characterized by powder X-ray diffraction technique. It was found that the YB3 powder developed a new phase, FeSb2O3, which is mainly responsible for the decrease in the near infrared solar reflectance. |
