Synthesis of SrAl2O4: Eu2+, Dy3+ Nanometer Phosphors by Detonation and Combustion Method
-
摘要: 在低温条件下分别用爆轰法和燃烧法制备出了SrAl2O4:Eu2+,Dy3+ 纳米发光粉。从合成条件、热处理温度等方面详细对比了爆轰法和燃烧法对所制备的SrAl2O4:Eu2+,Dy3+纳米发光粉的晶体生长行为、粒子形貌和光学性质等的影响。研究表明,随着热处理温度的升高,爆轰法制备的纳米发光粉的平均粒径逐渐增大,而燃烧法制备的纳米发光粉的平均粒径先减小后增大,在600 ℃时平均粒径存在一个极小值。在同样热处理温度下,爆轰法制备的纳米发光粉的平均粒径增长明显高于燃烧法合成的纳米发光粉的平均粒径。最后讨论了长余辉的发光机理,并给出了如何改进合成方法的建议。Abstract: The SrAl2O4: Eu2+, Dy3+ (SED) nanometer phosphors were synthesized at lower temperature by detonation and combustion method, respectively. The effects of synthesis conditions, annealing temperature on the growth behavior, the particle morphologies and optical properties of the as-prepared SED particles were contrasted. It was showed that the mean size of the SED particles prepared by detonation method increased gradually with increasing heat treatment, and that the mean size of the SED particles prepared by combustion method decreased firstly and then increased quickly and had a minimal value at 600 ℃. The mean size of the SED particles prepared by detonation method increased more quickly than that of the SED particles prepared by combustion method at same annealing temperature. Finally, the mechanism for the long afterglow was discussed and some suggestions on how to improve the synthesis methods were also presented.
-
Key words:
- detonation method /
- combustion method /
- nanometer phosphor powders /
- optical properties
-
Matsuzawa T, Aoki Y, Takeuchi N, et al. A New Long Phosphorescent Phosphor with High Brightness, SrAl2O4: Eu2+, Dy3+ [J]. J Electrochem Soc, 1996, 143(8): 2670-2673. Jia W, Yuan H, Lu L, et al. Phosphorescent Dynamics in SrAl2O4: Eu2+, Dy3+ Single Crystal Fibers [J]. J Lumin, 1998, 76-77: 424-428. Yuan Z X, Chang C K, Mao D L, et al. Effect of Composition on the Luminescent Properties of Sr4Al14O25: Eu2+, Dy3+ Phosphors [J]. J Alloy Compd, 2004, 377(1-2): 268-271. Chang C K, Mao D L, Shen J F, et al. Preparation of Long Persistent SrO2Al2O3 Ceramics and Their Luminescent Properties [J]. J Alloy Compd, 2003, 348(1-2): 224-230. Liu Y L, Ding H. Research Developments of Long Lasting Phosphorescence Materials [J]. Chinese J Inorganic Chemistry, 2001, 17(2): 181-187. ( in Chinese) 刘应亮, 丁红. 长余辉发光材料的研究进展 [J]. 无机化学学报, 2001, 17(2): 181-187. Smets B, Rutten J, Hokes G, et al. 2SrO3Al2O3: Eu2+ and 1. 29(Ba, Ca)O, 6Al2O3: Eu2+ [J]. J Electrochem Soc, 1989, 136(7): 2119-2123. Palilla B C, Levine A K, Tomkus M R. Fluorescent Properties of Alkaline Earth Aluminates of The Type MAl2O4 Activated by Divalent Europium [J]. J Electrochem Soc, 1968, 115(6): 642-646. Nakazawa E, Mochida T. Traps in SrAl2O4: Eu2+ Phosphor with Rare-Earth Ion Doping [J]. J Lumin, 1997, 72-74: 236-238. Mastsuzama T, Aoki Y, Takeuchi N, et al. A New Long Phosphorescent Phosphor with High Brightness SrAl2O4: Eu2+, Dy3+ [J]. J Electrochem Soc, 1996, 143(8): 2670-2673. Peng T Y, Liu H J, Yang H P, et al. Synthesis of SrAl2O4: Eu, Dy Phosphor Nanometer Powders by Sol-Gel Processes and Its Optical Properties [J]. Mater Chem Phys, 2004, 85(1): 68-72. Kutty T R N, Jagannathan R, Rao R P. Luminescence of Eu2+ in Strontium Aluminates Prepared by the Hydrothermal Method [J]. Mater Res Bull, 1990, 25(11): 1355-1362. Kingsley J J, Suresh K, Patil K C. Combustion Synthesis of Fine-Particle Metal Aluminates [J]. J Mater Sci, 1990, 25: 1305. Lin Y, Zhang Z, Zhang F, et al. Preparation of the Ultrafine SrAl2O4: Eu, Dy Needle-Like Phosphor and Its Optical Properties [J]. Mater Chem Phys, 2000, 65(7): 103-106. Katsumata T, Nabae T, Sasajima K, et al. Growth and Characteristics of Long Persistent SrAl2O4- and CaAl2O4-Based Phosphor Crystals by a Floating Zone Technique [J]. J Crystal Growth, 1998, 183(3): 361-365. Qu Y D, Li X J, Chen T, et al. Development of Long-Lasting Phosphorescent Materials of Aluminates Hosts [J]. Chinese J Rare Metals, 2006, 30(1): 100-106. (in Chinese) 曲艳东, 李晓杰, 陈涛, 等. 铝酸盐系长余辉发光材料的研究新进展 [J]. 稀有金属, 2006, 30(1): 100-106. Peng T Y, Yang H P, Pu X L, et al. Combustion Synthesis and Photoluminescence of SrAl2O4: Eu, Dy Phosphor Nanoparticles [J]. Mater Lett, 2004, 58(3-4): 352-356. Li X J, Qu Y D, Xie X H, et al, Preparation of SrAl2O4: Eu2+, Dy3+ Nanometer Phosphors by Detonation Method [J]. Mater Lett, 2006, 60(29-30): 3673-3677. Matsuzawa T, Aoki Y, Takeuchi T, et al. A New Long Phosphorescent Phosphor with High Brightness, SrAl2O4: Eu2+, Dy3+ [J]. J Electrochem Soc, 1996, 143(8): 2670-2673. Liu J J, He H L, Jin X G, et al. Synthesis of Nanosized Nickel Ferrites by Shock Waves and Their Magnetic Properties [J]. Mater Res Bull, 2001, 36(13-14): 2357-2363.
点击查看大图
计量
- 文章访问数: 7770
- HTML全文浏览量: 298
- PDF下载量: 661