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中国地质大学(武汉) 材料与化学学院, 湖北 武汉 430074
纸质出版日期:2012-8-10,
收稿日期:2012-4-25,
修回日期:2012-6-2,
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李雪静, 梁玉军, 杨帆, 夏章艮, 李云丽, 黄文珠. 助熔剂对绿色荧光粉Ba<sub>2</sub> SiO<sub>4</sub>∶Eu<sup>2+</sup> 颗粒形貌及发光性能的影响[J]. 发光学报, 2012,33(8): 817-823
LI Xue-jing, LIANG Yu-jun, YANG Fan, XIA Zhang-gen, LI Yun-li, HUANG Wen-zhu. Effect of Fluxes on Morphology and Luminescent Properties of Ba<sub>2</sub>SiO<sub>4</sub>∶Eu<sup>2+</sup> Green Phosphor[J]. Chinese Journal of Luminescence, 2012,33(8): 817-823
李雪静, 梁玉军, 杨帆, 夏章艮, 李云丽, 黄文珠. 助熔剂对绿色荧光粉Ba<sub>2</sub> SiO<sub>4</sub>∶Eu<sup>2+</sup> 颗粒形貌及发光性能的影响[J]. 发光学报, 2012,33(8): 817-823 DOI: 10.3788/fgxb20123308.0817.
LI Xue-jing, LIANG Yu-jun, YANG Fan, XIA Zhang-gen, LI Yun-li, HUANG Wen-zhu. Effect of Fluxes on Morphology and Luminescent Properties of Ba<sub>2</sub>SiO<sub>4</sub>∶Eu<sup>2+</sup> Green Phosphor[J]. Chinese Journal of Luminescence, 2012,33(8): 817-823 DOI: 10.3788/fgxb20123308.0817.
采用高温固相法在弱还原气氛下合成了Ba
2
SiO
4
∶Eu
2+
绿色荧光粉
利用X射线衍射、扫描电子显微镜和荧光分光光度计考察了不同助熔剂对Ba
2
SiO
4
∶Eu
2+
荧光粉的结晶度、物相纯度、颗粒形貌和发光强度的影响
并详细讨论了不同助熔剂在荧光粉制备过程中的作用机理。结果表明:不加助熔剂时样品存在BaSi
2
和SiO
2
杂相;利用NH
4
F、Na
2
CO
3
或H
3
BO
3
作为助熔剂时会抑制BaSi
2
杂相的形成
而BaF
2
作助熔剂可以得到纯的斜方晶系。与未加助熔剂合成的荧光粉相比
添加质量分数为2% 的BaF
2
、NH
4
F或Na
2
CO
3
后合成样品的发光强度分别提高了138%
81%和34%;而质量分数为2%的H
3
BO
3
作助熔剂时
荧光粉的发光强度反而降低了14%。BaF
2
作助熔剂合成的荧光粉颗粒形貌接近球形
以NH
4
F、Na
2
CO
3
或H
3
BO
3
作助熔剂合成的荧光粉颗粒形貌分别为不规则片状、纺锤体形和不规则多边形大颗粒。
A series of Ba
2
SiO
4
∶Eu
2+
green phosphors have been synthesized by high temperature solid state method. The effects of different fluxes on the crystal structure
surface morphology and spectral characteristics of Ba
2
SiO
4
∶Eu
2+
phosphors were systematically investigated by X-ray powder diffraction (XRD)
scanning electron microscopy (SEM) and fluorescence spectrophotometer. The function mechanism of different fluxes on the preparation of Ba
2
SiO
4
∶Eu
2+
phosphors have also been discussed. XRD results show that the Ba
2
SiO
4
∶Eu
2+
phosphor without flux has the impurity phase of BaSi
2
and SiO
2
during firing
while fritted with NH
4
F
Na
2
CO
3
or H
3
BO
3
flux
the impurity phase of BaSi
2
can be suppressed. BaF
2
flux can get the pure orthorhombic. By comparing the influence of different fluxes on the emission of Eu
2+
it was found that the emission intensity of the Ba
2
SiO
4
∶Eu
2+
phosphor with 2% mass fraction of BaF
2
NH
4
F or Na
2
CO
3
flux improved by 138%
81%
34% than that of the powder without the flux material
while the luminescent intensity reduced 14% when using 2% mass fraction of H
3
BO
3
as flux. The phosphor powders were spherical-like shapes using BaF
2
as the flux
while the phosphor powder prepared with NH
4
F
Na
2
CO
3
or H
3
BO
3
as flux had the irregular laminated structure
spindle shape and irregular polygon
respectively.
Ba2SiO4∶Eu2+固相法助熔剂荧光粉
Ba2SiO4∶Eu2+solid-state methodfluxphosphor
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Liu Y F, Zhang X, Hao Z D, et al. Crystal structure and luminescence properties of (Ca2.94-xLuxCe0.06)(ScMg)Si3O12 phosphors for white LEDs [J]. Chin. J. Lumin.(发光学报), 2011, 32(5):445-450 (in Chinese).
Nishisu Y, Kobayashi M, Ohya H, et al. Preparation of Eu-doped alkaline-earth silicate phosphor particles by using liquid-phase synthesis method [J]. J. Alloys Compd., 2006, 408-412:898-902.
Jung K Y, Kim J H, Kang Y C. Luminescence enhancement of Eu-doped calcium magnesium silicate blue phosphor for UV-LED application [J]. J. Lumin., 2009, 129(6):615-619.
Im W B, Kim Y I, Yoo H S, et al. Luminescent and structural properties of (Sr1-x, Bax)3MgSi2O8∶Eu2+∶Effects of Ba content on the Eu2+ site preference for thermal stability [J]. Inorg. Chem., 2009, 48(2):557-564.
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Feng Z Y, Zhuang W D, Huang X W, et al. Effect of MgF2-H3BO3 flux on the properties of (Ce, Tb)MgAl11O19 phosphor [J]. J. Rare Earths (中国稀土学报,英文版), 2010, 28(3):351-354 (in English).
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Chen Y B, Gong M G, Cheah K W. Effects of fluxes on the synthesis of Ca3Sc2Si3O12∶Ce3+ green phosphors for white light-emitting diodes [J]. Mater. Sci. Eng. B, 2010, 166(1):24-27.
Lo C L, Duh J G, Chiou B S, et al. Synthesis of Eu3+-activated yttrium oxysulfide red phosphor by flux fusion method [J]. Mater. Chem. Phys., 2001, 71(2):179-189.
Duault F, Junker M, Grosseau P, et al. Effect of different fluxes on the morphology of the LaPO4∶Ce,Tb phosphor [J]. Powder Technol., 2005, 154(2-3):132-137.
Wang G B, Li Z G, He C L, et al. Effect of fluxes agent on crystal structure, morphology and luminescent properties of BaMgAl10O17∶Eu2+ [J]. Chemical Intermediate (化工中间体), 2011, 8(3):40-43 (in Chinese).
Wang W J, Liu B T, Wang Y H, et al. Morphology control and photoluminescence of BaMgAl10O17∶Eu2+,Mn2+ phosphors prepared by flux method [J]. Mater. Lett., 2011, 65(23-24):3580-3582.
Shen Y D, Dong Y, Li H J, et al. Effect of different fluxes on morphology and luminescence property of YAG∶Tb phosphor [J]. Chin. J. Funct. Mater.(功能材料), 2008, 12(39):1949-1952 (in Chinese).
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Pao R P. Morphology and stability of flux grown blue emitting BAM phosphor for plasma display panels applications [J]. J. Electrochem. Soc., 2005, 152(7):H115-H119.
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