磷酸盐发光材料的制备及性能研究
毕业论文关键词： 溶胶凝胶法；水热法；磷酸盐发光材料；发光性能
Preparation and properties of Phosphate luminescent material
Abstract:Nowadays, it’s well known that the achievements of rare earth materials in the luminescent material are very huge. China as a rare earths richest country should depend on the advantage of the natural conditions to develop the rare earth materials in each field. In this thesis, sol-gel method is used to rare earth alkali phosphate and rare earth orthophosphate luminescent material. During the sol-gel synthesis process, the proper organic complex was added to modify the morphology and microstructure of the final products. Furthermore, the triethyl phosphate was also chose to act as the reactants, which can be complex with the organic additive to form the net structure to control the morphology and particle size of the final product and to reduce the aggregation phenomenon. Finally, rare earth luminescent ions – doped as – prepared YPO4 from organic complex – assisted sol – gel method present different light emission under UV excitation.
Keywords:sol-gel method;Phosphate luminescent material;hydrothermal method;
luminescence property;Sr3Y(PO4)3
目录
1. 绪论 1
1.1. 稀土材料概述 1
1.1.1. 稀土元素简介 1
1.1.2. 稀土离子的电子结构 1
1.1.3. 稀土发光材料分类 2
1.1.4. 稀土发光材料的优点 3
1.1.5. 稀土离子的发光原理 3
1.2. 稀土发光材料 4
1.2.1. 碱土金属稀土磷酸盐 5
1.2.2. 稀土正磷酸盐的研究进展 5
1.3. 稀土发光材料的合成方法 6
1.3.1. 固相法 6
1.3.2. 化学沉淀法 6
1.3.3. 溶胶-凝胶法 6
1.3.4. 水热法 7
1.3.5. 燃烧法 7
1.3.6. 微乳液法 7
1.3.7. 喷雾热解法 8
1.3.8. 微波法 8
2. 实验部分 9
2.1. 实验试剂与仪器 9
2.1.1. 试剂 9
2.1.2. 仪器 9
2.2. 实验步骤 10
2.2.1. Sr3Y(PO4)3的合成 10
2.2.2. YPO4合成 10
2.2.3. YPO4掺杂1%、3%、5%、7%、9%的Eu3+、Tb3+离子 11
2.2.4. 对所有样品进行表征 11
3. 结果与讨论 12
3.1. 不同的反应条件对合成碱土金属磷酸盐产物的影响 12
3.1.1. 不同含量的葡萄糖对合成的产物结构影响 12
3.1.2. 不同焙烧温度对合成产物的结构影响 14
3.2. 有无葡萄糖对合成稀土磷酸盐产物结构的影响 15