采用柠檬酸溶胶燃烧法合成了Ca_3(VO_4)_2:Eu~(3+)红色发光材料.利用XRS、SEM、荧光分光光度计等测试分析方法研究了合成温度、柠檬酸用量以及Eu~(3+)含量等对合成样品组成、结构、显微特征和发光性能的影响.结果表明,采用柠檬酸溶胶燃烧法可以在700～1000℃范围内合成纯度高、结晶度好、粒度均匀的Ca_3(VO_4)_2:Eu~(3+)红色发光粉.优化条件为温度900℃、n(柠檬酸):n(Ca~(2+)+V~(5+))=0.8、Eu~(3+)摩尔分数6%,合成产物的红光发光效果最好.
A red emitting phosphor Ca_3(VO_4)_2:Eu~(3+) is synthesized by a citric acid(CA)-assisted sol combustion method and characterized by X-ay diffraction(XRD)，scanning electron microscopy (SEM) and fluorescence spectropbotometer.The influences of processing parameters，such as synthesis temperature，the amounts of citric acid and the concentration of Eu~(3+)，on phase compositions，microscopic characteristics and luminescent properties are investigated systematically.Results show that the Ca_3(VO_4)_2:Eu~(3+) phosphor with high phase purity，good crystallinity and uniform distribution of particle size can be obtained by this citric acid-assisted sol combustion route at the synthesis temperature from 700℃ to 1000℃.The sample prepared at T=900℃，n(CA):n(Ca~(2+) +V~(5+) )=0.8，Eu~(3+) mol%=6mol% has the highest emission intensity in this work.
参考文献
| [1] | Riwotzki K;Haase M .Colloidal YVO_4:Eu and YP_(0.95)V_(0.05)O_4:Eu Nanoparticles:Luminescence and energy transfer processes[J].Journal of Physical Chemistry B,2001,105(51):12709. |
| [2] | Osvaldo A S;Simone A C;Renata R I .A new procedure to obtain Eu~(3+) doped oxide and oxosalt phosphors[J].Journal of Alloys and Compounds,2000,303-304:313. |
| [3] | Kandarakis I;Cavouras D;Panayiotakis G S et al.Europium-activated phosphors for use in X-ray detectors of medical imaging systems[J].European Journal of Radiology,1998,8(02):313. |
| [4] | Glass A M;Abrahams S C;Ballman A A et al.Calcium orthovanadate,Ca_3(VO_4)_2--A new high-temperature ferroelectric[J].Ferroelectrics,1978,17(3-4):579. |
| [5] | Brixner L H;Flournoy P A .Calcium orthovanadate Ca_3(VO_4)_2--A new laser host crystal[J].Journal of the Electrochemical Society,1965,112(03):303. |
| [6] | Grzechnik A.;Mcmillan PF. .HIGH PRESSURE BEHAVIOR OF SR-3(VO4)(2) AND BA-3(VO4)(2)[J].International Journal of Quantum Chemistry,1997(1):156-162. |
| [7] | 郑仕远;李荣缇;罗永明 et al.自蔓延燃烧法材料合成技术[J].山东陶瓷,1999,22(04):3. |
| [8] | Tsaramyrsi M;Kavousanaki D;Raptopoulou C P et al.Systematic synthesis,structural characterization,and reactivity studies of vanadium (V)-citrate anions[VO_2(C_6 H_6O_7)]_2~(2-),isolated from aqueous solutions in the pre-sence of different cations[J].Inorgan Chem Acta,2001,320(1-2):47. |
| [9] | Jain S R;Adiga K C;Pai Verneker V R .A new approach to thermochemical calculations of condensed fuel-oxidizer mixtures[J].Combustion and Flame,1981,40(C):71. |
| [10] | Wang SF.;Gu F.;Lu MK.;Song CF.;Xu D.;Yuan DR.;Liu SW. .Photoluminescence of sol-gel derived ZnTiO3 : Ni2+ nanocrystals[J].Chemical Physics Letters,2003(1/2):223-227. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%