Yttrium aluminates are interesting compounds

in particular with regards to their optical properties.Activation by Ce

3+

for example

gives a fast response flying spot scanner phosphor

and activation by Tb

3+

gives a characteristic narrow band phosphor suitable for contrast enhanced display applications in high ambient illumination conditions.The YAG based materials are normally synthesized at a relatively high temperature(

>

1500℃) by a solid state reaction between Al

2

O

3

and Y

2

O

3

.Such conditions normally lead to powders of relatively large and wider varying grain sizes and varying impurity content.The sol gel method

because of its apparent advantages of fine homogeneity

high reactivity of starting materials and lower sintering temperature

is a new route to synthesize powders. In this study

the Eu

3+

doped YAG phosphors were synthesized by the sol gel process using metal alkoxide at the lower temperature of 1000℃.The formation process and structure of the phosphor powders were investigated by means of TG DSC

XRD.The purified crystalline phase of YAG were obtained at 1000℃.The differences for the excitation and emission spectra of Eu

3+

in crystalline and amorphous states of YAG were observed

and the emission intensities increased with the increasing of sintering temperature and Eu

3+

concentration.