Optical properties of PrAlO3 nano ceramic

Nano crystals of PrAlO3 ceramic are prepared by the modified combustion technique. The structural analysis of the as prepared powder is done using the X-ray diffraction technique, shows that the compound possesses rhombohedral structure with R3c space group. The lattice constants are a=b=5.332Åand c=12.97Å. The crystallite size determined from the XRD and the TEM image is,33nm and 35nm respectively. The FT-IR spectral analysisconfirms the phase purity of the prepared sample. The UV-Vis absorption spectrum shows main peaks in the wavelength range 440–490 nm. The optical band gap determined from the Tauc's plot is 4.67eV. Photoluminescence spectrum obtained at the excitation wavelength 370 nm of sample is also recorded and analyzed