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用X射线粉末衍射法研究了Li_2O-CaO-Gd_2O_3-SiO_2:Eu,Bi发光体系的物相组成随Gd_2O_3含量的变化,探讨了不同硅酸盐物种和结构对Eu~(3+)和Bi~(3+)发光特性的影响。结果表明,无Gd_2O_3组分时发光体是β-CaSiO_4多晶体,当Gd_2O_3/SiO_2比超过2.5％时,Ca_2Gd_8(SiO_4)_6O_2和LiGd_9(SiO_4)_6O_2物相逐渐增加,当其成为主要物相时,EU~(3+)发光呈数倍增强,这2种含钆物相的结构既利于EU~(3+)的红光发射又利于敏化剂向激活剂传输能量,所形成的固熔体是优良的发光基质材料。
The phase composition of Li 2 O-CaO-Gd 2 O 3 -SiO 2: Eu, Bi luminescence system with Gd 2 O 3 content was studied by X-ray powder diffraction. The effects of different silicate species and structure on the luminescence of Eu 3+ and Bi 2- (3+) luminescence properties. The results show that the luminescent material is β-CaSiO 4 polycrystal without Gd 2 O 3. When Gd 2 O 3 / SiO 2 ratio exceeds 2.5%, the phases of Ca 2 Gd 8 (SiO 4) 6 O 2 and LiGd 9 (SiO 4) 6 O 2 gradually increase. , EU ~ (3 +) luminescence was enhanced by several times. The structure of these two gadolinium-containing phases is not only conducive to the red emission of EU ~ (3+) but also to the sensitizer to transfer energy to the activator. The solid solution The body is an excellent luminescent host material.