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Citation: ZHENG Zishan, CHEN Zhi, LIN Yanmei, CHEN Bisang, LIN Heng, CHEN Guoliang, ZHOU Wenhua, YU Jin, CHEN Jianhua. Water Durability of Long Afterglow SrAl₂O₄: Eu²⁺, Dy³⁺ Phosphor Encapsulated with Foamed Plastic[J]. Chinese Journal of Applied Chemistry, ;2012, 29(1): 41-45. doi: 10.3724/SP.J.1095.2012.00041 shu

Water Durability of Long Afterglow SrAl₂O₄: Eu²⁺, Dy³⁺ Phosphor Encapsulated with Foamed Plastic

1.
Department of Chemistry and Environmental Science, Zhangzhou Normal University, Zhangzhou 363000, China

Corresponding author: ZHENG Zishan,
Received Date: 24 January 2011
Available Online: 4 July 2011
Fund Project: 国家自然科学基金(21076174) (21076174)福建省科技厅高校产学研重大项目(2010H6029) (2010H6029)福建省科技厅资助项目(JA03142)项目资助 (JA03142)

The long afterglow luminescent material of SrAl₂O₄:Eu²⁺,Dy³⁺ was encapsulated with polystyrene foamed plastic via a simple physical technology,and charaeterized by means of X-ray diffraction patterns,fourier transform infrared spectroscopy,excitation and emission spectra,thermogravimetric analysis,and transmission electron microscopy observation.Its water durability was investigated.The results show that the encapsulated layer has a thickness of about 5~10 nm and the mass fraction of encapsulation amount is about 4.9%.The encapsulation does not change the inner structure of the phosphor and has barely influence on their photoluminescence.The encapsulation can effectively improve the water durability of the phosphors with initial intensity of 5.02 cd/m².The decay time can reach up to over 10 h after immersed in water for 15 h.
- afterglow,
- encapsulation,
- foamed plastic,
- SrAl₂O₄:Eu²⁺,Dy³⁺
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Water Durability of Long Afterglow SrAl₂O₄: Eu²⁺, Dy³⁺ Phosphor Encapsulated with Foamed Plastic