A comparative study of nanostructured calcium copper titanate thin film and powder and their properties

Abstract

Abstract This paper reports on the effect of phase formation on the dielectric behaviour of nanostructured calcium copper titanate (CaCu3Ti4O12) thin film and powder prepared by using the sol–gel method. X-ray diffraction peaks were indexed as a cubic phase belonging to the Im3 space group for both film and powder. The monophase with a highly crystalline nature was obtained at lower temperature for thin film compared with powder. Micrographs of CaCu3Ti4O12 thin film and nanopowder confirmed the presence of nano-dimensional particles. The functional groups and optical properties of both film and powder were characterized by using the Fourier transform infrared spectrum and the photoluminescence spectrum. The CaCu3Ti4O12 thin film showed higher dielectric permittivity than powder, which strongly suggests that nanostructured thin film is a more efficient material than powder for microelectronic devices.