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Bikram Keshari Das,Tanushree Das,Kajal Parashar,S. K. S. Parashar,Rajeev Kumar,A.V. Anupama,Balaram Sahoo 대한금속·재료학회 2020 ELECTRONIC MATERIALS LETTERS Vol.16 No.3
The present work, Cr doped ZnO nanoceramics abbreviated as Zn1-xCrxO (x=0, 0.01, 0.03) synthesized by mechanical alloying. The structural, morphological, dielectric and optical properties of the synthesized samples were studied by using X-raydifraction (XRD), Field Emission Scanning Electron Microscopic analysis (FE-SEM), UV–Visible spectroscopy (UV–Vis)and Impedance analyzer respectively. The structural parameters were measured by Rietveld method. The result shows theformation of single phase nanoceramics with hexagonal wurtzite structure with space group P63mc. The crystallite size wasfound to decrease with increase in Cr concentration (~ 20 nm) and broadening of XRD peak exists in the samples. FE-SEMresult shows that incorporation of Cr changes the surface morphology of ZnO. The band gap energy (Eg) at room temperaturewas measured using Tauc relation and was found to decreases with increase in Cr concentration. The dielectric constant (ε)value of ZnO decreases with Cr doping and with increase in concentration the peak shifted towards higher temperature region.