STRUCTURE AND DIELECTRIC PROPERTIES OF NANOCOMPOSITES: OPAL MATRIX - TITANIUM OXIDE AND RARE-EARTH TITANATES

Abstract

The conditions for the formation of nanocomposites based on the basis of lattice packings SiO2 nanospheres (opal matrices) with included clusters of crystalline phase of titanium oxide (TiO2 and TiO) and rare-earth titanates of the general formula R2TiO5 or R2Ti2O7, where R - Er, Dy, Gd, Pr, Tb and Yb in interspherical nanospacing are considered. The composition and structure of the nanocomposites studied electron microscopy, X-ray diffraction and Raman spectroscopy. Results of measuring of the frequency dependences of real and imaginary components of the permittivity and microwave conductivity (ranging 10-2-1012 Hz) obtained nanostructures are viewed.

Keywords

• opal matrix
• nanocomposites
• titanium oxide
• rare-earth titanates
• x-ray diffractometry
• raman spectroscopy
• dielectric properties