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以Nd2O3、Yb2O3、Gd2O3和Ga2O3为原料,采用柠檬酸凝胶燃烧法制备了Nd3xYb3yGd(3-3x-3y)Ga5O12(Nd、Yb:GGG)纳米多晶粉体。利用XRD、IR、SEM及荧光光谱研究了Nd、Yb:GGG纳米多晶粉体的相组成及荧光性能。XRD测试结果表明,粉体在未煅烧时已结晶,煅烧温度为700℃时粉体已形成Nd、Yb:GGG纯相;SEM观察发现,Nd、Yb:GGG纳米多晶粉体粒度约为50nm,粒径均匀,分散性较好。荧光光谱测试结果表明,Nd、Yb:GGG纳米多晶粉体最强发射峰在1030nm,是Yb3+的2F5/2-2F7/2谱项导致的荧光发射,未发现Nd3+的荧光发射峰,说明Nd3+将吸收的能量传递给了Yb3+。
Nd3xYb3yGd (3-3x-3y) Ga5O12 (Nd, Yb: GGG) nanocrystalline powders were prepared by citric acid gel combustion using Nd2O3, Yb2O3, Gd2O3 and Ga2O3 as raw materials. The phase composition and fluorescence of Nd, Yb: GGG nanocrystalline powders were investigated by XRD, IR, SEM and fluorescence spectroscopy. The results of XRD showed that the powders had crystallized without calcination and the Nd, Yb: GGG pure phases were formed at the calcination temperature of 700 ℃. The SEM and SEM showed that the grain sizes of Nd and Yb: GGG nanocrystalline powders were about 50 nm , Uniform particle size, better dispersion. The results of fluorescence spectroscopy showed that the strongest emission peak of Nd, Yb: GGG nanocrystalline powder was at 1030 nm, which was the fluorescence emission of 2F5 / 2-2F7 / 2 spectra of Yb3 +. No fluorescence emission peak of Nd3 + was found. The absorbed energy is passed to Yb3 +.