摘要：为了增强传统实验教学的吸引力,提升本科生的综合实验技能和科研素养,课程组基于“两性一度”原则,设计了纳米X射线发光材料的制备与表征研究性综合实验。实验采用均匀沉淀法,结合固气硫化技术制备纳米Gd2O2S:Tb3+发光材料,利用X射线衍射、扫描电子显微镜和发光光谱对材料的结构物相、形貌和发光性能进行表征。通过实验的学习和训练,提高了学生对发光材料合成与表征方法的认知,强化了学生的实验操作能力,培养了学生的科学研究素养和创新思维。

摘要：yD3＋/Tm3＋ co-doped and yD3＋/Ho3＋/Tm3＋ tri-doped tellurite glasses were synthesized by fusing the mixture of TeO2, PbF2, AIF3, BaF2, Yb2O3, Tm203 and H0203 in a cortmdum crucible at 850 ℃ for 20 min. The synthesized glasses were characterized by upconversion emission spectra under the excitation of 980 nm laser, and the emission colors were investigated according to the CIE-1931 standards. The results indicated that yD3＋/Tm3＋ co-doped tellurite glass exhibited blue upconversion emission with favor- able color coordinates of （0.20, 0.07）. Yb3＋, HO3＋ and Tm3＋ tri-doped tellurite glasses presented white upconversion luminescence under a single 980 nm laser excitation. Moreover, a very wide range of emission colors could be tuned by altering Ho3＋ concentration. Combining the contribution of adjusting Ho3＋ concentration and pump power, near equal energy white light was obtained.

摘要：为了将发光材料的合成及表征过程融入实验教学,解决仪器设备昂贵、实验成本高、实验过程存在高温烫伤风险等问题,构建了固相法合成上转换荧光粉及光谱测量虚拟仿真实验教学系统.基于“高阶性、创新性和挑战度”原则,设计了虚拟仿真实验教学内容,建立了学考分离的教学评价模式.通过对实验工艺方法、设备认知、光路拆装及测量等环节的虚拟训练,旨在使学生充分了解和掌握上转换发光的物理过程,固相法制备上转换荧光粉的工艺流程,相关仪器设备的使用以及发射光谱的测量和分析方法.该虚拟仿真实验为科研反哺教学提供了新的途径,拓展了基础物理实验教学的广度和深度.