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采用溶胶-凝胶法制备了BaO-TiO2-3SiO2∶Eu3+发光材料,通过DTA-TG、IR、XRD、SEM、激发和发射光谱图对材料的结构和发光性能进行了研究。结果表明,100℃～200℃之间出现明显失重现象,说明在此过程中凝胶中的吸附水和乙醇等有机物大量挥发,600℃出现失重阶梯并放出热量,发生晶型转变;制备的样品中主要存在Ti-O-Si和Ti-O键;XRD测试证明,材料主要在600℃～1000℃之间发生晶型转变,当经800℃退火处理后,主要以Ba2TiSi2O8晶体结构存在时,材料发光最好。材料制备的最佳退火温度为800℃,Eu3+在BaO-TiO2-3SiO2基质中的掺杂量为1.80%(摩尔分数),发光最好。在612 nm监测波长下,测得的最佳激发波长为可见光465 nm,即在465 nm光激发下,材料发射强度高、单色性好的红光。
BaO-TiO2-3SiO2:Eu3 + luminescent material was prepared by sol-gel method. The structure and luminescent properties of the material were investigated by DTA-TG, IR, XRD, SEM, excitation and emission spectroscopy. The results show that there is obvious weight loss between 100 ℃ and 200 ℃, indicating that a large amount of volatile organic compounds such as water and ethanol in the gel volatilize during this process. The main Ti-O-Si and Ti-O bonds exist in the matrix. The XRD results show that the material mainly changes from 600 ℃ to 1000 ℃. When annealed at 800 ℃, the crystal structure of Ba2TiSi2O8 mainly exists. Glow the best. The optimal annealing temperature for the material preparation is 800 ℃. The doping amount of Eu3 + in the matrix of BaO-TiO2-3SiO2 is 1.80% (mole fraction), and the luminescence is the best. At the monitoring wavelength of 612 nm, the best excitation wavelength is 465 nm. That is, under the excitation of 465 nm, the material has high emission intensity and good monochromatic red light.