Effect of Precipitants on Morphologies of Lu_2O_3 Phosphors by Co-precipitation Process

Eu~(3+)-doped Lu_2O_3 phosphor nanopowders were synthesized by co-precipitation process with NH_3·H_2O,NH_4HCO_3 and the mixed solution of NH_3·H_2O and NH_4HCO_3 as the precipitants, respectively.Effects of precipitants on microstructures and properties of obtained Lu_2O_3 phosphor were investigated on study of decomposition behavior of precipitate precursor by means of DTA-TG-MS and FTIR spectra.The morphologies and particle size distributions of obtained Lu_2O_3 phosphors were characterized.It is found that powders from the mixed precipitant method exhibits best microstructural morphology with weak agglomeration state and particle size distribution.After being calcined at 1000℃for 2h,the average crystalline size of Lu_2O_3 reaches 35nm with medium particle size (D_(50)) of 0.48μm.