QIU Ke-hui, LI Jun-feng, GAO Xiao-ming, FU Mao-yuan. Preparation of SrAl<sub>2</sub>O<sub>4</sub>:Tb<sup>3+</sup>,Ce<sup>3+</sup> Phosphor and Studies on Its Luminescent Properties[J]. Chinese Journal of Luminescence, 2004,25(2): 197-201
QIU Ke-hui, LI Jun-feng, GAO Xiao-ming, FU Mao-yuan. Preparation of SrAl<sub>2</sub>O<sub>4</sub>:Tb<sup>3+</sup>,Ce<sup>3+</sup> Phosphor and Studies on Its Luminescent Properties[J]. Chinese Journal of Luminescence, 2004,25(2): 197-201DOI:
phosphor was an important green luminescence materials.It had many excellent properties such as long persistence of phosphorescence
high quantum efficiency
good stableness and no radiation in the use and preparation.In this paper
the SrAl
2
O
4
:Ce
3+
Tb
3+
phosphor was synthesized by high temperature solid-state reaction at a weak reductive atmosphere.The synthesis of this kind of phosphor generally requires high temperature(i.e.1350~1550℃)and reductive atmosphere which was made by the active carbon powder.The matrix composition
structures and luminescent properties of the phosphor could be affected under different synthesizing conditions
such as calcination temperature
soaking time
temperature-lowering way etc.The samples had been characterized by X-ray diffraction(XRD)analysis
scanning electron microscopy(SEM)and fluorospectrophotometer.Based On the XRD peaks and
the powder phosphors were identified as SrAl
2
O
4
phase
which was monoclinic(=8.4424
b=8.822
c=5.1607
=93.415).The results proved that the phosphors synthesized at different temperature in this work were all -SrAl
2
O
4
.Based on scanning electron photo micrograph
the grain sizes were increasingly amplified with the rise of the temperature synthesized.Excitation and emission spectrum of the SrAl
2
O
4
:Ce
3+
SrAl
2
O
4
:Tb
3+
and SrAl
2
O
4
:Ce
3+
Tb
3+
phosphors were tested by the fluo-rospectrophotometer.On the basis of analyzing the excitation and emission spectra
The results of the measurement indicated that after adding Ce
3+
to the system of SrAl
2
O
3
:Tb
3+
the luminescence intensity and afterglow time increases.So Ce