关键词: 微晶玻璃;YAG晶体;Eu掺杂;CIE色坐标;发光

Abstract: Eu doped YAG glass ceramics were synthesized by melting method.The pure YAG phase precipitation and YAG crystal microstructure of Eu before and after doped were studied by XRD and FESEM,the luminescent properties of the glass ceramics were studied by the fluorescence spectrum and CIE coordinates.The results indicate that the pure YAG phase are obtained at 1050 ℃ and the crystal size about 20-60 nm.Eu3+and Eu2+emission peak were obtained under the short-wave and long-wave ultraviolet excitation,but the luminescence intensity under the long-wave ultraviolet excitation was dozens of times of under the short-wave excitation.With the increasing of Eu doped concentration, the luminescence intensity of Eu2+enhanced obviously, the luminescence intensity of Eu3+enhanced first and then dropped.By changed the excitation wavelength and Eu doped concentration, finally obtained CIE coordinates of glass ceramics samples was(0.3326,0.3005),close to the white light coordinates. So YAG glass ceramics of the white light luminescence can be obtained by single-doped Eu.

Key words: glass ceramic;YAG crystal;Eu doped;CIE coordinates;luminescence