Abstract
In the present contribution, the study of nanostuctured powders of Mn2+-doped ZnO with different doping concentration (1, 2, 5 at%) was approached. The samples were synthesized by sol–gel method, and the influence of the Mn content on the thermal behavior of the resulted gels was established by thermogravimetric and thermodifferential analysis. Based on the results obtained by thermal analysis, the gels were isothermally treated at 500 °C, 1 h. The XRD powder measurements revealed that all samples had hexagonal wurtzite structure and no other secondary phases were observed suggesting that the Mn2+ ions have substituted Zn sites. Moreover, the incorporation of Mn2+ into ZnO lattice was also confirmed by Infrared and Raman spectroscopy. Energy-dispersive X-ray analysis indicates the existence of Mn2+ in all samples, even in that with 1 at% Mn. The morphology of the samples depends on Mn2+ concentrations. A decrease in the grain size with the increase in Mn2+ concentration was observed. Mn2+-doped ZnO nanopowders with desired structure and properties as promising materials in potential piezoelectric applications, were obtained.
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