采用高温固相法合成了Ba3SiO4Cl2∶Eu2+蓝绿色荧光粉, 并测量了材料的光谱特性等。 研究结果显示, 在365 nm近紫外光激发下, Ba3SiO4Cl2∶Eu2+材料呈双峰宽带发射, 主发射峰分别为445和510 nm; 分别监测这两个发射峰, 所得激发光谱覆盖范围为250～450 nm, 主激发峰分别为350和400 nm, 但光谱分布不同, 说明两发射峰来源于不同的Eu2+发光中心。 研究了Eu2+掺杂浓度对材料光谱性能的影响, 发现随Eu2+掺杂量的增大, 445 nm发射峰的强度增加, 而510 nm发射峰的强度减弱。 采用去离子水清洗Ba3SiO4Cl2∶Eu2+材料后, 445 nm发射峰消失, 只保留了510 nm发射峰, 且发射峰的强度明显减弱。

Ba3SiO4Cl2∶Eu2+ was synthesized by a high temperature solid state method. BaCO3 (A.R.), BaCl2 (A.R.), SiO2 (99.99%) and Eu2O3 (99.99%) were used as the raw materials. The final phase was checked with a conventional X-ray diffraction (XRD) (D/max-rA, CuKα, 40 kV, 100 mA, λ=0.154 06 nm). The spectral characteristics of the phosphors were performed by using a Hitachi F-4600 fluorescence spectrophotometer equipped with a 450 W Xe lamp. Ba3SiO4Cl2∶Eu2+ showed broad emission bands at 445 and 510 nm under the 365 nm radiation excitation. For the two emission peaks, the excitation spectra have two different spectral distributions, and the excitation peaks locate at 350 and 400 nm, respectively. The results indicate that different Eu2+ emission centres exist in Ba3SiO4Cl2. The emission intensity of the 445 and 510 nm peaks is influenced by Eu2+ doped content. With increasing its content, the emission intensity of 445 nm gradually increases, and that of 510 nm decreases. With washing the phosphor, the 445 nm emission peak disappears, and the emission spectrum has only the 510 nm emission band, and its intensity is lower than that of the original phosphor.