Preparation And Properties Of Ultrafine Phosphor

The experiment of Urea-sol method for synthesizing global, well-proportioned ,superfine-particle Y203: Eu red phosphor whose particle-diameter is 100?00nm is discussed in detail by this paper. And the experiment of synthesizing Y203: Tb green phosphor whose particle-diameter is 125?50nm by Urea-sol method is reported for the first time in present our knowledge by the paper.The particle-size and shapes of different temperature superfine-particle phosphors are observed and taken photos with scanning electron microscopy (SEM) .The diffraction patterns of them are measured by X-ray diffractometer ( XRD ) and microcosmic crystal-structure is analyzed . The emissive spectra and luminescent curves of them are measured with dynamic-test apparatus. A comparison is given between superfine-particle phosphor and Japanese commercial proj ection-tube phosphor. The characteristics of superfine-particle phosphors are deeply and carefully investigated in many aspects.The paper includes three parts, six chapters in all. Part one is composed of the first two chapters. The history of phosphor and future requirements of display phosphors are described and the mechanism of luminescence of phosphor materials is also explained; part two is only chapter three . The domestic and oversea methods of synthesizing nanoparticle phosphors and the design of thesis's experiment are discussed in this part; part three includes four chapter and five, the synthesis experiments and research courses and measured data of superfine-particle red and green phosphors are described in it. At the end of paper , it give a summary for the research and some considerations to improve the performance ofsuperfine-particle phosphor and the advantage if we use these special phosphors.