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用均相沉淀法和凝胶燃烧法分别合成了掺镱钆镓石榴石粉体(Yb~(3+)Gd_3Ga_5O_(12),gadolinium gallium garnet doped with ytterbium,Yb:GGG)。借助X射线衍射、透射电镜、热分析、红外光谱及荧光光谱等手段对制备粉体的结构、形貌、热分解过程及光谱特性进行对比分析。结果表明:在900℃煅烧8h后,2种方法均能获得单相立方的Yb:GGG纳米粉体。均相沉淀法及凝胶燃烧法得到的粉体平均粒径分别约为80nm和47nm。在488nm激发波长下,2种方法获得的Yb:GGG粉体的荧光光谱相似,荧光发射的最强峰位于1 027nm处,是Yb~(3+)的~2F_(7/2)→~2F_(5/2)谱相导致的荧光发射。
The Yb3Gd3Ga5O12, gadolinium gallium garnet doped with Ytterbium, Yb: GGG were synthesized by homogeneous precipitation method and gel combustion method respectively. The structure, morphology, thermal decomposition process and spectral characteristics of the prepared powders were analyzed by means of X-ray diffraction, transmission electron microscopy, thermal analysis, infrared spectroscopy and fluorescence spectroscopy. The results show that Yb: GGG single phase powder can be obtained by both methods after being calcined at 900 ℃ for 8 h. The average particle size of the powder obtained by the homogeneous precipitation method and the gel combustion method are about 80 nm and 47 nm, respectively. The fluorescence spectra of Yb: GGG powders obtained by the two methods at 488 nm excitation wavelength were similar, the strongest peak of fluorescence emission was at 1027 nm, which was ~ 2F_ (7/2) → ~ 2F_ (5/2) Spectral Fluorescence.