Improving Thermal Stability of BaMgAl10O17:Eu Phosphor
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第2期
论文作者：Dong Yan Cao Tong He Jinhua Jiang Jianqing Zhang Chao Liang Chao
Key words：PDP; BaMgAl10O17∶Eu; thermal degradation; thermal stability; SiO2; surface coating; rare earths;
Abstract: Heterogeneous precipitation method was used to prepared surface coating on self-made BaMgAl10O17:Eu phosphor. Results illustrate that the coating film can be silicon dioxide in amorphous state with 50 nm in thickness. Photoluminescence results indicate that the coating layer presents an observable improved effect on the enhancement of thermal stability. When baked at 600 ℃ for 1 h, the luminance of coated BAM keeps at 92% higher than that of uncoated BAM by 23%. This protective effect can be attributed to the high compact degree and uniformity of this amorphous SiO2 coating film which is served as a diffusion block layer to inbreak oxygen atom, thus releases the oxidation extent of Eu2+ effectively.
Dong Yan1，Cao Tong1，He Jinhua2，Jiang Jianqing1，Zhang Chao3，Liang Chao3
(1.Department of Material Science and Engineering, Southeast University, Nanjing 210096, China;
2.Jiangsu Bote New Materials Co., Ltd, Nanjing 210008, China;
3.Jiangsu Subote New Materials Co., Ltd., Nanjing 210008, China)
Abstract:Heterogeneous precipitation method was used to prepared surface coating on self-made BaMgAl10O17:Eu phosphor. Results illustrate that the coating film can be silicon dioxide in amorphous state with 50 nm in thickness. Photoluminescence results indicate that the coating layer presents an observable improved effect on the enhancement of thermal stability. When baked at 600 ℃ for 1 h, the luminance of coated BAM keeps at 92% higher than that of uncoated BAM by 23%. This protective effect can be attributed to the high compact degree and uniformity of this amorphous SiO2 coating film which is served as a diffusion block layer to inbreak oxygen atom, thus releases the oxidation extent of Eu2+ effectively.
Key words:PDP; BaMgAl10O17∶Eu; thermal degradation; thermal stability; SiO2; surface coating; rare earths;
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