【摘要】 研究了La2O3对Yb:Y2O3透明陶瓷光谱性能的影响,添加适量La2O3以后,Yb:Y2O3透明陶瓷的吸收峰和发射峰的位置不变,但由于La3+的离子半径大于Y3+的离子半径,在Y2O3中引入La3+离子后,导致Y2O3晶格常数变大,晶场强度变弱,同时降低了Y2O3晶体的有序度,致使发射峰强度有所下降,发射截面变小.过量的La2O3(x=0.16)造成Yb3+激活离子发射强度明显下降;其荧光寿命在添加La2O3后总体增大45%—60%.更多还原

【Abstract】 The effect of La₂O₃ doping on the spectroscopic properties of transparent Yb:Y₂O₃ ceramics was studied.After doping La₂O₃,the shapes and positions of the absorption and emission peaks of transparent（Yb 0.05Y 0.95-xLa_x）₂O₃ ceramics were almost the same as those of Yb:Y₂O₃.When La₂O₃ was added into Yb:Y₂O₃,the lattice constant of（Yb 0.05Y 0.95-xLa_x）₂O₃ became large and the crystal field strength weaker due to introducing of larger radius of La 3+ ion,simultaneously its degree of order is decreased,which results in the decrease of the emission intensities and the emission cross-sections.The emission intensities were reduced greatly for the excessive doping of La₂O₃（16at%）in（Yb 0.05Y 0.95-xLa_x）₂O₃ ceramics.On the whole the fluorescent lifetimes of the samples are increased by 45%—60% after doping La₂O₃.更多还原