缺陷化学教学中的实验实例:Dy,Eu掺杂SrAl_2O_4长余辉发光材料
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摘要
用燃烧法制备的Dy,Eu掺杂SrAl2O4长余辉发光材料能够观察到明显的余辉效应.故以此为缺陷化学的教学实验实例,并结合缺陷化学理论,对掺杂SrAl2O4物相结构、紫外可见光谱以及荧光特性进行了分析,阐明化学缺陷对SrAl2O4的结构以及性能的影响.
The paper gives an experiment example in teaching of defect chemistry for Eu and Dy co-doped SrAl2O4 with long afterglow phosphorescence.Obvious long afterglow phosphorescence can be observed for Eu and Dy co-doped SrAl2O4 synthesizing by means of combustion.The influences of chemistry defects in SrAl2O4 on its phase and energy band structure were illustrated by analyzing the results of XRD,UV-Vis and luminescence with defect chemistry.The paper can be used as supplement materials in teaching of defect chemistry to help student understand the theory of defect chemistry.
The paper gives an experiment example in teaching of defect chemistry for Eu and Dy co-doped SrAl2O4 with long afterglow phosphorescence.Obvious long afterglow phosphorescence can be observed for Eu and Dy co-doped SrAl2O4 synthesizing by means of combustion.The influences of chemistry defects in SrAl2O4 on its phase and energy band structure were illustrated by analyzing the results of XRD,UV-Vis and luminescence with defect chemistry.The paper can be used as supplement materials in teaching of defect chemistry to help student understand the theory of defect chemistry.
引文
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[6]ARELLANO O,MELNDREZ R,PEDROZA M,et al.Persistent Luminescence Dosimetric Properties of UV-irradia-ted SrAl 2 O 4:Eu 2+,Dy 3+Phosphor[J].J Lumin,2008,128(1):173-184.
[7]胡劲,孙加林,刘建良,等.铝酸锶长余辉材料制备新工艺及发光机理[J].材料与冶金学报,2006,5(2):109-114.
[8]张玉军,尹衍升.Eu 2+,Dy 3+共激活铝酸锶发光材料长余辉发光机理探讨[J].人工晶体学报,2004,33(1):67-70.
[2]胡志强.无机材料科学基础教程[M].北京:化学工业出版社,2004,56.
[3]彭敬东,马学兵.综合性大学化学实验教学体系和教学方法的思考与实施[J].西南师范大学学报:自然科学版,2010,35(2):259-263.
[4]喻胜飞,皮丕辉,文秀芳,等.稀土激活的碱土铝酸盐长余辉发光材料表面包覆的研究进展[J].稀有金属材料与工程,2008,37(10):1876-1880.
[5]周传仓,卢忠远,戴亚堂,等.燃烧法合成铕镝掺杂铝酸锶长余辉发光材料的研究[J].化工新型材料,2004,32(8):33-36.
[6]ARELLANO O,MELNDREZ R,PEDROZA M,et al.Persistent Luminescence Dosimetric Properties of UV-irradia-ted SrAl 2 O 4:Eu 2+,Dy 3+Phosphor[J].J Lumin,2008,128(1):173-184.
[7]胡劲,孙加林,刘建良,等.铝酸锶长余辉材料制备新工艺及发光机理[J].材料与冶金学报,2006,5(2):109-114.
[8]张玉军,尹衍升.Eu 2+,Dy 3+共激活铝酸锶发光材料长余辉发光机理探讨[J].人工晶体学报,2004,33(1):67-70.