Abstract: This paper reports the effec cts of calcination process on the structural and mid-inffrared optical properties of Zn0.9Mn0.1O nanopowders synthesized by the sol gel technique. The particle size was determ mined about 35 nm. X-ray diffraction analysis indicated that mmono-phase wurtzite structure was exhibited in sa amples calcinated at low temperatures. Appearance of secondaryy phases was well clarified that tuning the percentagge of these phases can be possible by manipulating the calcinatio tion temperatures. The characterization was comple leted by studying the mid-infrared transmittance spectra obtained by Fourier transform infrared (FTIR) spectroscopy.

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