Authors: M. Vijayakumar, N. Nallamuthu, M. Venkateswarlu, N. Satyanarayana
Affilation: Research Scholar, India
Pages: 951 - 954
Keywords: nanocrystalline Dy2O3, XRD, FTIR, SEM. EDX
As the functional materials, rare-earth (RE) oxides have been widely used in various fields in the past two decades, such as high-performance luminescent devices, magnets, catalysts, batteries, sensors, etc. Among the rare-earth (RE) oxides, Dy2O3 is found to have many advantages, such as, stabilizing the monolithic structure in high temperature, oxygen ion conducting sensors etc. Hence, the present work deals with the Synthesis and characterization of Dy2O3 nano crystalline power by using a combustion Urea process by using a combustion Urea process. The formation of crystalline phase and structure of the Dy2O3 compound were identified by monitoring the dried gel, heat treated at various temperatures, from amorphous to crystalline growth through XRD and FTIR measurements. The crystallite size was calculated using the Scherer equation, D = k / cos , where D is the crystallite size, k is a constant (=0.9 assuming that the particles are spherical), is the wavelength of the X-ray radiation, is the line width (obtained after correction for the instrumental broadening) and is the angle of diffraction. The average crystallize size obtained from XRD data is found to be ~28 nm. Tthe observed IR band positions revealed the formation of Dy2O3 structure and also the removal of water molecules. The microstructure and elemental analysis of the Dy2O3 formation was conform using SEM - EDX measurements.Detailed results will be presented and discussed.