Wang Yongya, Meng Fanbo, Chen Huiyu, Luo Wenqin, Xu Shunjian, Lv Chunyan
Huzhou Key Laboratory of Green Energy Materials and Battery Cascade Utilization, Huzhou College, Huzhou 313000, China.
Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Materials (Basel). 2024 Sep 12;17(18):4481. doi: 10.3390/ma17184481.
Ce-doped lithium alumino-silicate (Li-Al-Si) scintillating glass was prepared using a melting method and crystallized via heat treatment. X-ray diffraction and transmission electron microscopy confirmed the presence of nanocrystals in the materials. Radioluminescence spectra, obtained by X-ray excitation, and luminescence spectra, obtained by 338 nm excitation, showed that the luminescence intensity increased after crystallization. The glass was combined with pure silica as the inner cladding to fabricate a hybrid fiber core using a melt-in-tube technique. The composition of the fiber core was examined using an electron probe microanalyzer. The glass fiber produced strong blue luminescence under UV excitation. After a micro-crystallizing heat treatment of the hybrid fiber at 850 °C in a reducing atmosphere, a Ce-doped lithium alumino-silicate glass-ceramic scintillating hybrid fiber was obtained. The nanocrystal structure of the fiber core was examined using micro-Raman spectroscopy. Excitation and luminescence spectra of the hybrid fiber before and after micro-crystallization were measured using microspectrofluorimetry. The results demonstrated that the fiber remained luminous after micro-crystallization. Hence, this work provides a new way to prepare scintillating glass-ceramic hybrid fibers for neutron detection.
采用熔融法制备了掺铈锂铝硅酸盐（Li-Al-Si）闪烁玻璃，并通过热处理使其结晶。X射线衍射和透射电子显微镜证实了材料中存在纳米晶体。通过X射线激发获得的辐射发光光谱和通过338nm激发获得的发光光谱表明，结晶后发光强度增加。将该玻璃与纯二氧化硅作为内包层结合，采用管中熔融技术制备了混合纤维芯。使用电子探针微分析仪检查了纤维芯的成分。该玻璃纤维在紫外线激发下产生强烈的蓝色发光。在还原气氛中于850℃对混合纤维进行微晶化热处理后，获得了掺铈锂铝硅酸盐玻璃陶瓷闪烁混合纤维。使用显微拉曼光谱检查了纤维芯的纳米晶体结构。使用显微荧光光谱法测量了微晶化前后混合纤维的激发光谱和发光光谱。结果表明，微晶化后纤维仍保持发光。因此，这项工作为制备用于中子探测的闪烁玻璃陶瓷混合纤维提供了一种新方法。
