Europium-doped nanocrystalline ZrO

2

:Eu

3+

powders with different doped concentrations were prepared by chemical co-precipitation method

which is a useful and simple technique to dope Eu

3+

ions into a host material. The sharp characteristic photoluminescence (PL) in visible region originating from the intra-4f transition of the Eu

3+

ions and the energy transfer between the nanocrystalline ZrO

2

host and the dopants were observed at room temperature. Luminescent properties of nanocrystalline ZrO

2

:Eu

3+

with different sintering temperatures and doped concentrations were studied. At keeping the doped concentration unchanged

we found that the luminescent intensity of the sample with the sintering temperature 600℃ was greater than those of other samples. The luminescent intensity of the sample with the doped concentration 5% are relatively the greatest when other conditions were kept unchanged. Our results also show that the crystal phase is changed as the sintering temperature is increased. In addition

the charge transfer state of Eu

3+

ions was also observed in this paper.