SrAl

2

O

4

:Ce

3+

Tb

3+

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

3+

sensitized Tb

3+

and passed energy to it.