Preparation and Properties of Sm<,2>O<,3> Doped Y<,3>Al<,5>O<,12> Powders
YAG powders with different Sm concentrations were synthesized by nitrate-citrate sol-gel combustion method. Phase evolution, morphology and luminescent properties of the obtained materials were characterized by XRD, FESEM, photoluminescent excited by purple light, respectively. Powder X-ray diffraction showed that cubic YAG: Sm crystallites were directly obtained at 800℃ from amorphous materials. The crystallization stage was characterized by an exothermic peak of DSC curve at 910℃. FESEM micrographs revealed that the resultant phosphors were agglomerated with an average particle size of about 300nm. The photoluminescence spectra excited by 405nm wavelength showed several obvious emission bands located in the 550~700nm, corresponding to <4>G<,5/2>→<6>H<,5/2>, <4>G <,5/2>→<4>H<,7/2>, <4>G<,5/2>→<4>H<,9/2> transitions of Sm<3+> ions, respectively. For luminescence property, the emission intensity of YAG: Sm powders varied with the Sm contents and reached the maximum at 3％ (mole fraction) Sm. yttrium
aluminum garnet samarium oxide sol-gel combustion luminescence rare earths
Mu Lei(沐磊) He Wei(何伟) Wang Lixi(王丽熙) Zhang Qitu(张其土)
College of Materials Science and Engineering, Nanjing University of Technology,Nanjing 210009, China College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, Chin
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
493-496
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）