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GAP:Sm粉红色荧光粉的制备

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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
 

GAP:Sm粉红色荧光粉的制备


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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