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钕镱共掺钇铝石榴石纳米粉体

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Abstract:

采用溶胶–凝胶燃烧法,制备了钕镱共掺钇铝石榴石(Nd3+/Yb3+YAG)透明陶瓷纳米粉体,并用热分析、X射线衍射、红外光谱、透射电镜、吸收及荧光光谱等测试方法对其结构、形貌及性能进行分析。结果表明经900℃煅烧,Nd3+/Yb3+YAG透明陶瓷的质量损失为49.56%,所得到的Nd3+/Yb3+YAG纳米粉体结晶好,烧结性好,纯度较高,形状规则,粒径均匀,均在60~100nm之间。在808nm处具有较强的吸收带,对应于Nd离子4I9/2-4F7/2跃迁,有利于对808nm激光二级管泵浦光的吸收。在1064nm处,Nd3+/Yb3+YAG的发射峰要强于Nd3+YAG,说明在Nd3+/Yb3+YAG中,通过[(4F3/2)Nd,(2F7/2)Yb]→[(4I9/2)Nd,(2F5/2)Yb]离子间的交叉弛豫,产生了有效的Yb3+到Nd3+的能量转移,从而实现激光的高效输出。

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