Eu^3+掺杂含CaF2纳米晶锗酸盐微晶玻璃的制备及其发光性质

Preparation and Luminescence Properties of Eu Doped Germanate Glass Ceramics Containing CaF Nanocrystals

通过高温熔融淬冷法制备了Eu^3+掺杂锗酸盐玻璃,测试了393 nm光激发下不同Eu^3+掺杂浓度锗酸盐玻璃的发光性质,结果表明Eu^3+的最佳掺杂浓度为4%。对4%Eu^3+掺杂锗酸盐玻璃进行热处理得到Eu^3+掺杂含CaF2纳米晶的透明锗酸盐微晶玻璃。微晶玻璃的XRD结果表明,玻璃中析出相为纯的立方相CaF2,不含其他杂相,其晶粒尺寸约为13~19 nm。在393 nm紫外光激发下,微晶玻璃的发光强度随着热处理温度与热处理时间的增加而显著增强。同时,与基础玻璃相比,微晶玻璃在X射线激发下红光也得到显著增强。结果表明,Eu^3+掺杂含CaF2纳米晶锗酸盐微晶玻璃在X射线探测领域具有潜在的应用前景。

Eu^3+doped germanate glasses were prepared by melting and quenching at high temperature.The luminescence properties of germanate glasses with different concentrations of Eu^3+under the excitation of 393 nm light were measured.The results show that the optimal concentration of Eu^3+is 4%.Eu^3+doped transparent germanate glass ceramics containing CaF2 nanocrystals were prepared by heat treatment on 4%Eu^3+doped germanate glasses.The XRD results of the glass ceramics show that the precipitated phase is pure cubic CaF2,without other impurity phases,and the grain size is about 13~19 nm.Under the excitation of 393 nm light,the luminescence intensity of glass ceramics increases with the increment of heat treatment temperature and time.At the same time,compared with germanate glass,the red emission of germanate glass ceramics is significantly enhanced under X-ray excitation.The results show that Eu^3+doped germanate glass ceramics containing CaF2 nanocrystals have potential application prospects in the field of X-ray detection.