Dependence of optical properties of composite materials with nanosize oxide coatings on the properties of film-forming sols: II. Effect of the sol component concentration

We consider the effect of the component structure of a sol on optical characteristics (microscopic structure, refractive index and thickness of coating, reflectance, transmittance, and optical loss in composites of the type of a glass substrate + a nanosize oxide coating of the CuO–TiO$_2$ system) of composite materials with nanosize coatings, which are obtained in accordance with the sol-gel technology. It is shown that the chemical composition of precursors considerably affects the maturing of alcosols, the structure of coatings, and optical characteristics of composites. It is proposed that the dispersed phase represented by nanotubes facilitates a closer packing of particles into a layer as compared to the pseudospherical phase.