高分子网络凝胶法制备Nd∶YAG纳米粉体及其表征

Preparation and Characterization of Nd∶YAG Nano-powders by Polyacrylamide Gel Method

摘要:

以Al(NO₃)₃·9H₂O、Y(NO₃)₃·6H₂O 和 Nd(NO₃)₃·6H₂O为原材料，丙烯酰胺和N′N-亚甲基双丙烯酰胺为单体和网络剂，采用高分子网络凝胶法制备了Nd∶YAG纳米粉体。分别用热重 差热分析、Ｘ射线衍射、扫描电子显微镜、透射电子显微镜和荧光分光光度计对所得样品进行表征。结果表明，钇铝石榴石晶相的形成温度为880℃，粉体呈珊瑚虫状，粒径随着温度的升高而增大。Nd∶YAG纳米粉在401nm处有强烈的发光峰，可以作为紫光光源的考虑对象；另外在研究中还发现了Nd³⁺在YAG中的浓度猝灭现象。

Abstract:

Using Al(NO₃)₃·9H₂O、Y(NO₃)₃·6H₂O and Nd(NO₃)₃·6H₂O，acrylamide and N′N-methylene bis acrylamide as the starting materials, monomer and lattice reagent, respectively，the Nd∶YAG powders were prepared by polyacrylamide gel method. The prepared samples were characterized by thermo-gravimetric-differential scanning calorimetry, XRD, scanning electron microscopy, transmission electron microscopy, and photoluminescence spectroscopy. The results indicate that the formation temperature of pure YAG phase is 880℃. The YAG powders exhibit coral shape, and the particle size increases with the rise of temperature. The luminescence spectrum of YAG∶Nd³⁺ exhibits the strongest emission peak at 401nm. Concentration quenching effect of Nd³⁺ in YAG was observed in the study.