Solubility Limit of Sol–Gel Grown Nano Zn_1-xMg_xO Through Charge Density Distribution

Abstract

The mixed oxides Zn 1−x Mg x O were prepared as polycrystalline powders with various compositions (x = 0.02, 0.04, 0.05, and 0.10) using sol-gel technique. X-ray diffractometer (XRD) was used to characterize the powders for structural and electronic properties. X-ray diffraction analysis reveals that all the prepared samples exhibit the single wurtzite phase of zinc oxide (ZnO), and magnesiumdoping does not induce any secondary phase in the samples. The Bragg peak positions in the XRD patterns are found to be shifted towards higher 2θ values with more addition of magnesium in the zinc oxide lattice. Magnesium addition in the zinc oxide lattice is found to enhance the mid bond electron density distribution up to x = 0.05 and then decrease for x = 0.10. Evidence of host lattice as well as interstitial addition of Mg 2+ ions has been realized for x = 0.10, through electron density analysis.