分散、超细Fe3+-Eu3+/Ce3+/Nd3+共掺杂α-Al2O3纳米颗粒的制备及其发光性能研究

完全分散、窄尺寸分布的过渡金属-稀土元素共掺杂α-Al2O3纳米荧光颗粒的制备在发光材料领域具有重要意义。本项目拟采用添加辅助相结合化学共沉淀，进而分级聚沉分离来制备发光性能优异、完全分散、窄尺寸分布（最小尺寸分布在10 nm以下）的Fe3+-Eu3+/Ce3+/Nd3+共掺杂α-Al2O3纳米荧光颗粒；阐明前驱体制备及煅烧过程中元素存在形式及分布特征的演变过程及规律，揭示α-Al2O3中Fe3+含量可控掺杂机制；揭示分级聚沉分离时聚沉剂、颗粒尺寸分布特征对聚沉过程的影响机制，明确窄尺寸分布颗粒制备工艺；探讨Fe3+-Eu3+/Ce3+/Nd3+共掺杂α-Al2O3纳米荧光颗粒组分/尺寸-结构-发光性能三者间的依赖关系及作用机制，揭示其发光机理；为分散、超细α-Al2O3基纳米荧光颗粒的应用奠定基础。

The preparation of full disperse transition metal-rare earth element co-doped α-Al2O3 fluorescent nanoparticles with narrow size distribution is significant in the field of luminescence materials. In this project, full disperse α-Al2O3-based fluorescent nanoparticles with excellent luminescent properties and narrow size distribution (a minimum size distribution under 10 nm) will be prepared by adding auxiliary phase combined with chemical coprecipitation method, and then fractionated coagulation separation. The evolution and regularity of the existential forms and distribution characteristics of elements in the process of precursor preparation and calcination will be revealed. Fe3+ content controllable doped mechanism in α-Al2O3 will be explored. The influence mechanism of coagulating agent and particle size distribution characteristics during fractionated coagulation separation on the process of coagulation will be revealed. The preparation technology of the particles with narrow size distribution will be ascertained. The relationship and mechanism of composition/size-structure-luminescent property of the Fe3+-Eu3+/Ce3+/Nd3+ co-doped α-Al2O3 fluorescent nanoparticles will be revealed. The luminescent mechanism will be analyzed. It will lay the foundation for the application of disperse ultra-fine α-Al2O3-based fluorescent nanoparticles.