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1. 吉林大学 化学学院,吉林 长春,130026
2. 中国科学院长春应用化学研究所 稀土资源利用国家重点实验室,吉林 长春,130022
纸质出版日期:2009-10-30,
网络出版日期:2009-10-30,
收稿日期:2009-1-25,
修回日期:1900-1-2,
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胡 冰, 洪广言, 甘树才, 等. YTaO4 : Eu,Gd的合成及其发光[J]. 发光学报, 2009,30(5):601-605.
HU Bing, HONG Guang-yan, GAN Shu-cai, et al. Preparation and Luminescence Properties of YTaO4 : Gd,Eu[J]. Chinese Journal of Luminescence, 2009,30(5):601-605.
采用高温固相反应合成了Y
1-x-y
Eu
x
Gd
y
TaO
4
荧光体
经过XRD证明产物为纯相的M'型YTaO
4
结构。通过对样品的光谱测试表明
TaO
3-
4
将吸收的能量传递给Eu
3+
起着一定的敏化作用。掺入少量Gd
3+
对YTaO
4
: Eu的发光有一定的增强作用。用147 nm的真空紫外光激发样品时
样品具有较强的荧光发射
其主发射峰位于612 nm
具有较好的色纯度。
Rare earth tantalate is a kind of outstanding host material. Since containing elements with high atomic number
owing high density
strong X-ray absorption
high chemical stability and good radiation persistence
yttrium orthotantalate (YTaO
4
) was considered as a promising host for both X-ray and VUV phosphors.YTaO
4
: Gd
Eu was synthesized by solid state reaction
and the conditions of reaction were studied in detail: The mixture of appropriate amounts of Y
2
O
3
(99.99%)
Eu
2
O
3
(99.99%)
Gd
2
O
3
(99.99%)
Ta
2
O
5
(99.999%) and Li
2
SO
4
(A.R)
the Li
2
SO
4
was added 1% as flux
was thoroughly ground and then move to an aluminate crucible. The furnace was heated to and kept at 1 250 ℃. The crucible was put into the furnace and fired for 4 h. The crucible was taken out directly from furnace at 1 250 ℃. After reground
the mixture was heated again at 1 250 ℃ for another 4 h. The crucible was then taken out from the furnace at 1 250 ℃. The sample of pure M'-YTaO
4
was obtained when the crucible was cooled to room temperature. The XRD result indicated that we got the pure M' type of YTaO
4
: Gd
Eu.The excitation and emissioin spectra of YTaO
4
were measured. The excitation band at 230 nm is described to a charge transfer band nature of TaO
3-
4
group. The emission band of YTaO
4
situated at 365 nm. The main emission peak of YTaO
4
: Eu
3+
is at 611 nm and the excitation band of YTaO
4
: Eu
3+
is at about 250 nm. The excitation band at 250 nm was attributed to the result of the overlap of two charge transfer bands within Eu-O and Ta-O. This overlap makes the UV absorption of the phosphor enhanced. The quenching concentration of Y
1-x
Eu
x
TaO
4
luminescence is at about x=0.06.For the spectra of Y
0.94-y
Gd
y
Eu
0.06
TaO
4
the doping of Gd
3+
ion into YTaO
4
: Eu
3+
did not change the energy position of Eu
3+
luminescence
but enhanced the emission intensity of phosphors. The best doping concentration of y is about 0.1.For the emission spectra of Y
0.94
Eu
0.06
TaO
4
and Y
0.84
Gd
0.10
Eu
0.06
TaO
4
under VUV excitation
the main emission peaks of the two phosphors are the same at 612 nm. The chromaticity coordinates are x=0.652
y=0.348. The luminescent properties of the samples were studied on the VUV excitation spectra and emission spectra. It was concluded that Y
0.84
Gd
0.10
Eu
0.06
TaO
4
gets good luminescent effect
and the energy transfer between TaO
3-
4
and Eu
3+
Eu
3+
and Gd
3+
occurs.
钽酸钇稀土真空紫外发光
luminescenceYTaO4rare earthvacuum ultraviolet(VUV)
. Ferguson R B. The crystallography of synthetic YTaO4 and fused fergusonite [J]. Canadian Mineral., 1957, 6 (1):72-77.
. Wolten G M. Structure of M'-phase of YTaO4 3rd fergusonite polymorph [J]. Acta Cryst., 1967, 23 (6):939-944.
. Blasse G, Bril A. Luminescence phenomena in compounds with fergusonite structure [J]. J. Lumin., 1970, 3 (2):109-131.
. Blasse G. Vibrational-spectra of yttrium niobate and tantalate [J]. J. Solid State Chem., 1973, 7 (2):169-171.
. Brixner L H, Chen H-y. On the structural and luminescent properties of M/LnTaO4 rare earth tantalates [J]. J. Electrochem. Soc., 1983, 130 (12):2435-2443.
. Schipper W J, Hoogendorp M F, Blasse G. The luminescence and X-ray storage properties of Pr3+ and Ce3+ in YNbO4 and M'-YTaO4 [J]. J. Alloys Comps., 1993, 202 (1-2):283-287.
. Li Bo, Gu Zhennan, Lin Jianhua, et al. Energy transfer in the luminescence process of YTaO4 : Gd, Eu [J]. Acta Physico- Chimica Sinica (物理化学学报), 1999, 15 (9):794-798 (in Chinese).
. Li Bo, Gu Zhennan, Dong Yi, et al. The luminescence properties of M type of YTaO4 : Eu [J]. Chem. Research in Chin. Universities, 1999, 15 :226-231.
. Hong Guangyan, Zeng Xiaoqing, You Hongpeng, et al. Vacuum ultraviolet spectra of host crystals [J]. J. Chin. Ceramic Society (硅酸盐学报), 2004, 32 (3):233-238 (in Chinese).
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