69.  Characterization of ZnGa2O4 Obtained by Hydrothermal Synthesis

Authors: P. Vlazan, M. Bradiceanu, R. Bucur, M. Vasile, I. Grozescu


Abstract:

Zinc gallate (ZnGa2O4) is a normal spinel crystal structure (space group Fd3m). ZnGa2O4 has attracted much attention due its multitude of possible applications regarding field emission display, electroluminescent devices and in the last decade mostly sensor domain. ZnGa2O4 nanoparticles were obtained by hydrothermal method using Ga2O3 and Zn(NO3)2 x 6H2O precursors in basic medium using a Teflon-lined stainless steel autoclave tightly sealed. The synthesys was effectuated at 210oC for 4h. Hydrothermal method is one of the most promising solution chemical methods. Thus the particles size and their distribution, phase homogeneity, and morphology could be well controlled. These powders were characterized by X-ray diffraction (XDR) and scanning electron microscopy (SEM), energy dispersive spectroscopy (EDAX) and atomic force microscopy (AFM). Photoluminescence (PL) measurements were obtained with a conventional lamp as an excitation source.


Keywords: ZnGa2O4, hydrothermal synthesis, nanoparticle, photoluminescence, SEM, X-ray

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