Dr. Gholamhossein Khorrami, Dr. Maliheh Mousavi, Dr. Mohammad Alinejadmofrad,
Volume 32, Issue 1 (4-2024)
Abstract
In this research, pure and Ba-doped lead zirconate titanate nanopowders were synthesized by sol-gel combustion in order to investigate their structural, optical and electrical properties. The results of the structural investigations showed that the samples have a tetragonal crystal structure with the crystallite size of about 20 to 30 nm. Cohen's method and size-strain diagram were used to calculate the lattice constants and the average size of nanocrystals, respectively. Transmission electron microscope was used to determine the size and shape of nanoparticles. Optical properties of prepared samples were studied using Kramers-Kronig relations and FTIR technique. The band gap of the samples was obtained about 3.5 eV using Kubelka-Munk equation. Dielectric constant of pure and Ba-doped samples was obtained 1050 and 570 at frequency of 100 Hz, respectively. SEM image showed the grain size of pure samples is about 2 to 3 μm.
