Gd^(3+)对黄磷炉渣发光微晶玻璃析晶及性能的影响

Effect of Gd^(3+)on the Crystallization and Luminescence Properties of Yellow Phosphorus Slag Glass-ceramics

以黄磷炉渣为主要原料,制备了不同钆含量的Tb^(3+)掺杂CaO-Al_(2)O_(3)-SiO_(2)系统微晶玻璃.采用差热分析仪、X射线衍射仪、荧光光谱仪研究了Gd_(2)O_(3)含量对该微晶玻璃析晶及发光性能的影响.结果表明:在1%~4%的Gd_(2)O_(3)添加范围内,Gd_(2)O_(3)的添加使微晶玻璃析晶峰温度和析晶活化能均升高,对基础玻璃的析晶有一定的阻碍作用;在λ_(em)=542nm的激发光谱中,Gd^(3+)和Tb^(3+)的特征激发峰强度均随Gd_(2)O_(3)含量的增加逐渐增强,在λ_(ex)=317nm的发射光谱中,Gd_(2)O_(3)的添加使Tb^(3+)特征发射峰强度增加明显,微晶玻璃的荧光寿命逐渐增长.通过光谱图结合能级图分析,在该微晶玻璃体系中Gd^(3+)对Tb^(3+)具有敏化作用,Gd^(3+)可通过共振传递的方式将能量传递给Tb^(3+),从而提高Tb^(3+)掺杂黄磷炉渣微晶玻璃的发光强度.

Tb^(3+)doped CaO-Al_(2)O_(3)-SiO_(2)luminescent glass-ceramics with different content of Gd_(2)O_(3)were prepared,yellow phosphorus slag being the main raw material.The effects of Gd_(2)O_(3)content on the crystallization and luminescent properties of the glass-ceramics were researched by differential thermal analysis,X-ray diffraction and fluorescence spectrometer.The results show that in the range of 1%—4%Gd_(2)O_(3),the addition of Gd_(2)O_(3)increases the crystallization peak temperature and crystallization activation energy of the glass-ceramics,which has a certain hindering effect on the crystallization of the base glass.In the excitation spectrum ofλ_(em)=542 nm,the characteristic excitation peak intensity of Gd^(3+)and Tb^(3+)gradually increase with the increase of Gd_(2)O_(3)content.In the emission spectrum ofλ_(em)=317 nm,the addition of Gd_(2)O_(3)increase the Tb^(3+)characteristic emission peak intensity significantly,and the lifetime of fluorescence progressively extended.By analyzing the spectrogram and the energy level diagram,it turns out that Gd^(3+)has a sensitizing effect on Tb^(3+)in this glass-ceramic system,and Gd^(3+)can transfer energy to Tb^(3+)through resonance transmission and enhance the luminescence of Tb^(3+)doped yellow phosphorous slag glass-ceramics strength.