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长余辉发光材料SrAl₂O₄:Eu²⁺,Dy³⁺的稳定性研究

Research on the Moisture Resistance of SrAl₂O₄:Eu²⁺,Dy³⁺

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【Author】 GUO Chong-feng~1,L Yu-hua~2,SU Qiang~(1, 2) (1. School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275,China; 2. Laboratory of Rare-Earth Chemistry and Physics∥Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022,China)

【机构】中山大学化学与化学工程学院；中国科学院长春应用化学研究所稀土化学和物理开放研究室；中山大学化学与化学工程学院广东广州510275；吉林长春130022；广东广州510275；吉林长春130022；

【摘要】 Eu2+和Dy3+激活的铝酸盐是典型的长余辉发光材料,吸引了广大科研工作者进行研究,且已广泛用于人们的日常生活中。但是,这类长余辉发光材料在水溶液中极易水解,抗湿性差,严重制约了其应用,为此采用了在其表面包覆抗湿性能较好的无机膜来提高其耐水性,采用XRD、SEM等方法来表征其膜的存在,且对荧光粉包膜前后的发光性能及耐水性进行了详尽的研究。结果表明包膜并没有对荧光粉的发光性能有太大的影响,却使其耐水性有了较大的改善。更多还原

【Abstract】 Stability of the luminescent and long phosphorescent properties of SrAl₂O₄:Eu²⁺,Dy³⁺ in water was researched. The phosphors are easy to hydrolysis,their luminescent character changes and emit blue green light. To improve the moisture resistance of SrAl₂O₄:Eu²⁺,Dy³⁺, phosphor was fired with ammonium difluoride at 700 ℃.The phosphor particles were coated with a moisture-impervious coating.The results showed that it improved the moisture resistance of phosphors and did not degrade the luminesence obviously.更多还原