Citric acid chelating method was used to prepare Ce^3＋ doped BaHfO3 nano-powder. TG-DTA, XRD and SEM were employed to characterize the powder. The excitation and emission spectra of the specimens were analyzed by the fluorescence photometer. Results show that BaHfO3：Ce^3＋ nanometer powder with high degree of crystallinity, nearly spherical morphology and 40 nm particle size could be synthesized after the precursor gel prepared under the condition of CA：EG=1：3 was calcined at 1050 ℃ for 2 h. The maximum relative intensities of the excitation spectra and emission spectra appeared for the BaHfO3：Ce^3＋ specimen with Ce^3＋ doped concentration of 0.9 mol%. The excitation spectrum has two relatively wide spectrum bands where there are maximum peak values at the wavelength of 393 nm and 445 nm, respectively. The emission spectra at λex= 393 nm and λex=445 nm also have two spectrum bands where exist maximum peak values at 530 nm and 590 nm, respectively, corresponding to 5d→^2F5/2 and 5d→^2F7/2 transitions of Ce^3＋ cation, respectively. The emission spectra at 393 nm and 445 nm are obviously different, because the 4f ground State of Ce^3＋ cation is formed by two energy levels, with the energy difference of about 2000 cm^-1.
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