TGG nanopowders were prepared by sol-gel method. The phase structure of TGG nanopowders was investi-gated by XRD, TG-DTA, IR and SEM, etc. The results indicated that TGG nanopowders belong to cubic-phase system. The TGG crystal phase appeared during the phase transition process, which leads to the absorption peaks oc-curring from 1000℃ to 1100℃. The vibration modes of Tb-O-Ga bond were pointed out by IR spectra. The particle size of the samples sintered at 1100℃ is about 100nm.%采用溶胶凝胶法制备TGG纳米粉体,利用XRD、TG-DSC、IR和SEM等测试手段分析了TGG纳米粉体的物相结构.结果表明:TGG纳米粉体属于立方晶系,在1000℃和1100℃下烧结的样品,颗径尺分别为80nm和100nm.1000℃附近出现的失重是因为发生了相变过程,生成了TGG晶相,通过红外光谱和拉曼光谱对TGG粉体的振动模式进行了归属.
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