R Jafari - Department of Color Physics, Institute for Color Science and Technology, Tehran, Iran
M Gharagozlou - Department of Nanomaterials and Nanotechnology, Institute for Color Science and Technology, Tehran, Iran

In this paper, the effect of component ratio on optical attributes of nanocomposites of Ni-Fe spinels dispersedin silica matrix is investigated. In this way, various percentages of the nano-sized magnetic particles, i.e., 10%, 20%,40% and 50%, are embedded in amorphous component. Then, the reflectance spectra of nanocomposites are measuredover the visible spectrum to calculate the colorimetric properties of nanocomposites. Results show that by increasingmolar ratio of Ni-Fe spinel nanoparticles in amorphous component, the lightness properties of nanocomposites decreasewhile the chroma attribute increase. It means that dispersion of more amounts of nano-sized magnetic crystals inamorphous network leads to darker and more saturated nanocomposites. The reflectance spectra of nanocomposites indifferent component ratio prove the colorimetric achievements. On the other hand, based on the achieved hue angles itseems that increasing of Ni-Fe spinel nanoparticles component does not lead to the significant variation in hue attributesof nanocomposites of Ni-Fe spinels.

Nanocomposites, Ni-Fe spinels, Silica, Reflectance spectra, Colorimetric attribute