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采用尿素溶胶法合成(Y0.95Eu0.05)2O3纳米粉，用超临界干燥技术制备了n-(Y0.95Eu0.05)2O3/SiO2气凝胶介孔组装体。结果表明，当Y3+∶Eu3+=20∶1,均相反应时间为4 h，且经680℃、 4 h灼烧热处理后得到的n-(Y0.95Eu0.05)2O3中， 光致发光强度最大（发光峰位于612 nm)，以Si与 2Y摩尔比为1∶7的n-(Y0.95Eu0.05)2O3/SiO2气凝胶介孔组装体，经同样条件热处理后，光致发光强度达不到n-(Y0.95Eu0.05)2O3的红光发射强度，而且峰位出现红移（发光峰在616 nm）。对产生上述发光强度减弱和峰位红移现象进行讨论。
(Y0.95Eu0.05) 2O3 nano-powder was synthesized by urea sol-gel method, and the mesoporous assembly of n- (Y0.95Eu0.05) 2O3 / SiO2 airgel was prepared by supercritical drying technique. The results showed that the maximum photoluminescence intensity was obtained when the reaction time was 4 h at Y3 +: Eu3 + = 20: 1 and n- (Y0.95Eu0.05) 2O3 after heat treatment at 680 ℃ for 4 h. (Luminescence peak at 612 nm). With the same conditions, the photoluminescence intensity of photoluminescence reached to the highest in the range of 612 nm for n - (Y0.95Eu0.05) 2O3 / SiO2 airgel mesoporous assembly with molar ratio of Si to 2Y being 1: 7 Less than the n- (Y0.95Eu0.05) 2O3 red emission intensity, and the peak position redshift (emission peak at 616 nm). We will discuss the weakening of luminescence intensity and the redshift of peak position.