XRD and FTIR characterization of nanocrystalline YVO_4: Eu derived by co-precipitation process

摘要

Nanosized YVO_4 powders doped with Eu~(3+) were synthesized through a co-precipitation process. The influence of annealing temperature on the microstructural features was investigated by X-ray powder diffraction (XRD) and Fourier Transform Infrared spectroscopy (FTIR). Nanocrystalline YVO_4 phase is obtained just after the precipitation process without thermal treatment. The integral breadth approach based on Williamson-Hall plots was used for analysis of XRD line broadening. By this simple method, a dramatic increase of apparent the size of coherently diffracting domains is evidenced when the temperature of thermal treatment is increased from about 500 to 600℃. XRD data were compared with the annealing temperature behaviour of FTIR absorption bands corresponding to the VO_4 group.