Nanostructured zinc aluminates: A promising material for cool roof coating
Nanostructured zinc aluminate pigments were synthesized using a citrate solegel method. All the samples were annealed at 600 C, 700 C, 800 C, and 1100 C for 6 h, respectively. The as-synthesized samples were characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
H. : ĐHQGHN
2020
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| Subjects: | |
| Online Access: | http://repository.vnu.edu.vn/handle/VNU_123/76694 https://doi.org/10.1016/j.jsamd.2019.10.003 |
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| Institution: | Vietnam National University, Hanoi |
| Language: | English |
| Summary: | Nanostructured zinc aluminate pigments were synthesized using a citrate solegel method. All the
samples were annealed at 600 C, 700 C, 800 C, and 1100 C for 6 h, respectively. The as-synthesized
samples were characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR),
field emission scanning electron microscopy (FE-SEM), UVeViseNIR spectroscopy and CIE L*a*b* color
analysis. The phase purity and structural analysis of the zinc aluminates were confirmed using X-ray
diffraction and Rietveld refinement. The morphological and microchemical analysis was done using FESEM, TEM and EDX. The particle size and reflectance properties are found to be sensitive to the annealing
temperature. The samples exhibited a total solar reflectance of about 85%. An attempt was also made to
compare the total solar reflectance of the synthesized zinc aluminates with that of commercially
available TiO2 by applying over a concrete cement surface. |
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