Preparation of GdCaAl3O7 : Eu nanoparticles by a combustion method and their characterization
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GdCaAl3O7 : Eu nanoparticles were synthesized using a metal nitrate solution with glycine as fuel. X-ray diffraction (XRD), a scanning electron microscope (SEM), a transmission electron microscope (TEM) and a photoluminescence spectrophotometer (PL) were used to characterize the products obtained. XRD patterns revealed that a pure GdCaAl3O7 : Eu phase was formed by combustion of the metal nitrate solution in the presence of glycine at pH = 4. The appearance of spongy agglomerates indicates large amounts of exhaust gases and intense ignition of the powder obtained. SEM and TEM images showed that the agglomerates consisted of nanoparticles and 5-10 nm nanopores. An investigation of the chromaticity of the synthesized naophosphors showed that all samples synthesized at pH = 1 (after calcination), pH = 3 and pH = 4 have a red emission under 245 nm UV lighting. Furthermore, the synthesized sample at pH = 1 (after calcination) and the sample synthesized at pH = 4have almost the same CIE chromaticity xy values.
Abstract
GdCaAl3O7 : Eu nanoparticles were synthesized using a metal nitrate solution with glycine as fuel. X-ray diffraction (XRD), a scanning electron microscope (SEM), a transmission electron microscope (TEM) and a photoluminescence spectrophotometer (PL) were used to characterize the products obtained. XRD patterns revealed that a pure GdCaAl3O7 : Eu phase was formed by combustion of the metal nitrate solution in the presence of glycine at pH = 4. The appearance of spongy agglomerates indicates large amounts of exhaust gases and intense ignition of the powder obtained. SEM and TEM images showed that the agglomerates consisted of nanoparticles and 5-10 nm nanopores. An investigation of the chromaticity of the synthesized naophosphors showed that all samples synthesized at pH = 1 (after calcination), pH = 3 and pH = 4 have a red emission under 245 nm UV lighting. Furthermore, the synthesized sample at pH = 1 (after calcination) and the sample synthesized at pH = 4have almost the same CIE chromaticity xy values.
참고문헌 (14)
- Ch. Kulshreshtha, , Proc of ASID ’06, 8-12Oct, New Delhi, pp.294~ (2006)
- K. Lee, , Solid. State. Commun, 122, pp.485~488 (2002)
- Y.E. Smirnov, , Russ. J. Gen. Chem, 72, pp.1954~1958 (2002)
- L. Zhoua, , Solid. State. Chem, 178, pp.3004~3009 (2005)
- A. Bao, , J. Lumin, 126, pp.859~865 (2007)
- M.G. Matos, , J. Lumin, 129, pp.1120~1124 (2009)
- C.H. Kim, , J. Electrochem. Soc, 149, pp.H183~H187 (2002)
- J. McKittrick, , Displays, 19, pp.169~172 (1999)
- S. Ekambaram, , J. Alloy. Compd, 393, pp.81~92 (2005)
- J.G. Mahakhode, , J. Alloy. Compd, 438, pp.293~297 (2007)
- F.A.A.D. Jesus, , J. Eur. Ceram. Soc, 29, pp.125~130 (2009)
- M. Kottaisamy, , Rao. Mater. Res. Bull, 31, pp.1013~1020 (1996)
- F. Deganello, , J. Eur. Ceram. Soc, 29, pp.439~450 (2009)
- R.K. Lenka, , J. Alloy. Compd, 466, pp.326~329 (2008)