There are many studies and application about long-lasting phosphorescence powder

but not so much about long-lasting glass.Due to particular properties of glass such as being easy to be made into product with various shape in the range from thin plate to bulk plank and special optical properties.Therefore we think that the studies on long-lasting luminescence of glass are important academically.This article introduces a new way to produce long-lasting luminescence glass:Eu

Dy co-doped aluminum-borosilicate glass with a composition of 18.5%SiO

2

30% B

2

O

3

20%Al

2

O

3

20%SrO

0.5%Eu

2

O

3

1%Dy

2

O

3

(mol fraction).The glass are melted under air atmosphere at 1300℃ then deoxidized under CO atmosphere at 1200℃.Spectrum analysis showed that the sample without the procedure of deoxidization has no afterglow and the sample reheated under CO atmosphere has afterglow.The excitation spectrum of the sample showed a peak at about 462 nm which is due to the d-f transition of divalent europium.There is also a peak at about 578 nm that is the characteristic peak of trivalent europium.Thus the long-lasting luminescence glass is due to the characteristic emission of Eu

2+

ion.In order to get higher performance long-lasting luminescence glass

we must convert more Eu

3+

into Eu

2+

as it could be by introducing reducer agent directly in glass or improving producing mechanics of glass.The decay of the luminescence is complex processes that consist of three parts:a fast decay;a intermi-(date) and a long decay.So the decay of the sample is compatible with the long-lasting phosphorescent powder.However the luminescence intensity of glass are far less than that of long-lasting phosphorescent powder.We considered that the formation of SrAl

2

O

4

Eu

2+

Dy

3+

micro-crystal is difficult in glass.So further study should be carried on the mechanism of Eu

2+

Dy

3+

co-doped glass and its phosphorescent properties.