Effect of propylene glycol-water ratio on morphology of Y_2O_2S particles prepared by complex homogeneous precipitation method(<Feature>Global Innovation in Advanced Ceramics)

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The effect of propylene glycol-water ratio on the final particles morphology of Eu doped Y_2O_2S red phosphor prepared by the complex homogeneous precipitation at 95℃ and 160℃ was examined. The synthesis method was based on hydrolysis of urea and precipitation of the hydroxide in the presence of a glycol under solvothremal conditions; the sulfurization of the powders was carried out at 1000℃ in the N_2-H_2S gas. It was found that by changing the glycol concentration one may efficiently control the size of the particles in the range from 60 to 400 nm. The most homogeneous and non-agglomerated powders formed during precipitation at 160℃ in the range of glycol-water mass ratios from 1:1 to 3:1. At the same time, the crystallinity determined from the XRD peaks broadening changes in a narrower range of 30-70 nm.
社団法人日本セラミックス協会の論文
2008-03-01