GAP：Sm粉红色荧光粉的制备
GAP：Sm粉红色荧光粉的制备(含任务书,开题报告,外文翻译,毕业论文7700字,答辩PPT)
摘 要
采用柠檬酸盐—硝酸盐燃烧法制备钐掺杂钙钛矿型钆铝酸盐荧光粉体（GdAlO3：Sm），并对GdAlO3：Sm3+粉体进行发光性能测试。测试时主要手段有：X射线衍射分析（XRD）、热分析（TG-DSC）、荧光光谱分析(PL)和紫外激发照相。
实 验结果表明：由柠檬酸盐-硝酸盐所制得凝胶，在400℃预烧凝胶1h得到前驱粉体，将所得粉体研磨后，在900℃高温煅烧2h可以得到平均粒径为 1.80um单相GdAlO3粉末，且预烧后煅烧前的研磨可以有效降低粉末粒径。GdAlO3:Sm荧光粉，在365nm紫外灯照射下呈现明亮粉红色；在 254nm、296nm、402nm激发下，发射粉红色荧光（其中4G5/2–6H7/2发射峰强度最大，对应602nm）；当掺杂浓度达到7%时，发光 强度达到最大。
关键词：柠檬酸盐—硝酸盐燃烧法；钆铝酸盐；荧光粉；钙钛矿结构；钐
The fabrication of GAP:Sm pink phosphor
Abstract
The citrate-nitrate combustion method was used to prepare the Sm-doping perovskite gadolinium aluminate phosphor (GdAlO3:Sm), and the phophor’s luminescent property was detected. X-ray diffraction analysis (XRD), fluorescence spectroscopy (PL) and UV photograph were the main analysis methods.
Experimental results showed: GdAlO3 single phase powder could be fabricated at 400℃ for 1h then at 900℃ for 2h by the precursor powder which was made by citrate-nitrate combustion method. The final powder size is 1.80um. The grinding after 400℃ for 1h and before final annealing would reduce the powder size greatly. GdAlO3:Sm emitted bright pink luminescence under 365nm UV light. Under 254nm, 296nm, 402nm excitation, the phosphor would emit pink luminescence with the peak at 602nm, respect to Sm3+ 4G5/2–6H7/2 electronic transition; the most suitable doping amount for Sm3+ in GdAlO3 matrix is 7% atomic ratio.
Keywords: the citrate-nitrate combustion method, gadolinium aluminate, phosphors, perovskite, Sm
目 录
摘要 I
Abstract I
1 引言 1
2 实验方法 3
2.1 实验原料 4
2.2 性能测试 4
2.3 实验方法 4
3 实验结果和讨论 5
3.1 钙钛矿型钆铝酸盐的合成 5
3.1.1 钆铝酸盐粉体最佳煅烧温度分析 5
3.1.2 柠檬酸盐-硝酸盐燃烧法 7
3.2 光谱分析 9
4 结论 11
5 参考文献 11
致谢 14
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