Synthesis and Luminescent Properties of (Ce0.67-xGdx Tb0.33 ) MgAl11O19 Phosphors
来源期刊：JOURNAL OF RARE EARTHS2004年增刊第3期
论文作者：Zhang Junying Wang Tianmin ZHANG Zhongtai
Key words：phosphors; sol-gel; aluminates; luminescent materials;
Abstract: Phosphors with ( Ce0. 67 -xGdxTb0. 33 ) MgAl11 O19 (0 ≤ x ≤0.37 ) composition were prepared by sol-gel processing. The preparation process, crystal structure and luminescent properties of the phosphor powders were investigated.The excitation spectrum is characteristic of Ce3+ ion, while the emission spectrum is composed of lines from Tb3+ ion with main emission peaks at around 542 nm and 487 nm. As the Gd3 + concentration increases, the luminescent intensity at about 542 nm increases to a maximum when x is about 0.12 and then decreases again at higher concentration of Gd3 +ion, whereas, the luminescence at about 487 nm follows the contrary rule.
Zhang Junying1，Wang Tianmin1，ZHANG Zhongtai2
(1.School of Sciences, Beijing University of Aeronautics and Astronautics , Beijing 100083, China;
2.State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China)
Abstract:Phosphors with ( Ce0. 67 -xGdxTb0. 33 ) MgAl11 O19 (0 ≤ x ≤0.37 ) composition were prepared by sol-gel processing. The preparation process, crystal structure and luminescent properties of the phosphor powders were investigated.The excitation spectrum is characteristic of Ce3+ ion, while the emission spectrum is composed of lines from Tb3+ ion with main emission peaks at around 542 nm and 487 nm. As the Gd3 + concentration increases, the luminescent intensity at about 542 nm increases to a maximum when x is about 0.12 and then decreases again at higher concentration of Gd3 +ion, whereas, the luminescence at about 487 nm follows the contrary rule.
Key words:phosphors; sol-gel; aluminates; luminescent materials;
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