Influence of Al, Fe, and Cu on the microstructure, diffused reflectance, THz, and dielectric properties for ZnTiO3 nanocrystalline

Bakr, Ahmed M., Ali B. Abou Hammad, Ahmed R. Wassel, Amany M. El Nahrawy, and A. M. Mansour. “Influence of Al, Fe, and Cu on the microstructure, diffused reflectance, THz, and dielectric properties for ZnTiO3 nanocrystalline.” International Journal of Materials Engineering Innovation 12, no. 2 (2021): 115-133.

Abstract

Structural, diffused reflectance, THz, and dielectric features of perovskite ZnTiO₃ (doped with 5 mol.% of Al, Cu, and Fe) prepared using the sol-gel and calcined at 800°C have been investigated. The Al, Cu, and Fe can replace the titanium ions and form sols solutions in the ZnTiO₃ phase, and the spectroscopic and dielectric of the ZnTiO₃ peaks changed with the dopant addition. X-ray diffraction patterns elucidate the creation of the ZnTiO₃ rhombohedral phase, while the introduction of Al and Fe within the ZnTiO₃ structure is composed of two phases identified as cubic phase Zn₂TiO₄ structure and TiO₂ besides the rhombohedral of zinc-titanate. The various dopants induce a surface morphology modification observed by SEM. Diffusive reflection for ZnTiO₃ doped Al, Cu, and Fe indicated higher transparent over the wavelength 400 nm which making them a choice as excellent transparent semiconductor oxides for different optoelectronic applications. The electric modulus has the least values nearly reach zero at low frequency denoting that a neglected contribution of electrode polarisation to the total polarisation. THz and dielectric performance of a material is closely related to its composition and microstructure.