Autores: Ahmed, I.S.|Dessouki, H.A.|Ali, A.A.
30 (4), 584-591
MgAl2O4 was successfully used as a crystalline host network for the synthesis of nickel-based nano cyan refractory ceramic pigments. Different compositions of NixMg1-xAl2O4 (0.1 x 0.8) powders have been prepared by using a low temperature combustion reaction (LTCR) of the corresponding metal nitrates with urea (U) as a fuel at 300 C in an open air furnace. The as-synthesized samples were characterized by thermal analysis (TG-DTG/DTA), X-ray powder diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). UV-/Visible and diffuse reflectance spectroscopy (DRS) using CIE- L*a*b* parameters methods have been used for color measurements. The results show that the NixMg1-xAl2O4 samples are the crystalline phase with a particle size of 8.85?43.66 nm in the temperature range 500-1200 oC. The density, particle size, shape and color are determined for all the prepared samples with different calcination times and temperatures.
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