Effect of Cr Doping on the Structural, Optical and Dielectric Properties of MoO3 Microrods Synthesized by Sol-Gel Auto Combustion Method

In the present work, pure and Cr-doped MoO3 microrods were successfully prepared through sol gel auto combustion method. The phase evaluation microstructural, dielectric, optical properties of synthesized samples investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), an impedance analyzer (1 MHz–3 GHz). All showed hexagonal structure with space group (P63). According to Vegard’s law, lattice parameters increase in chromium (Cr3+) contents. addition, Williamson–Hall (W–H) plot was drawn for evaluating micro-strain (εW-H) crystallite size (DW-H) parameters. From microstructural analysis it found that increased along Cr3+ Decreasing band gap observed (from 2.98 2.71 eV) increasing variation dielectric constant tangent loss respect frequency analyzed.