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采用溶液燃烧法在600℃合成等离子体平板显示器(plasma displaypanel,PDP)用蓝色荧光粉SrMgAl10O17:Eu2+。通过X射线粉末衍射仪、场发射扫描电子显微镜和荧光分光光度计分别表征样品的晶体结构、颗粒形貌和发光性能。研究燃料CO(NH2)2的质量、激活剂离子(Eu2+)的摩尔掺量和助熔剂H3BO3的质量掺量对产物发光性能的影响。结果表明:当CO(NH2)2加入量为理论值的2倍时,样品发射峰的强度达到最高值,在327nm紫外光激发下,发射主峰单一(λem=470nm),为一宽带连续谱,是典型Eu2+的4f65d→4f7的特征发射;激活剂离子Eu2+的淬灭浓度为7%,浓度淬灭机制为电子双极–双极作用交互方式;加入适量H3BO3可以提高样品的光谱发射强度。
The blue phosphor SrMgAl10O17: Eu2 + for plasma display panel (PDP) was synthesized by solution combustion method at 600 ℃. The crystal structure, particle morphology and luminescence properties of the samples were characterized by X-ray powder diffraction, field emission scanning electron microscopy and fluorescence spectrophotometer. The effects of the mass of fuel CO (NH2) 2, the molar amount of activator ions (Eu2 +) and the mass content of flux H3BO3 on the luminescent properties of the product were studied. The results show that when the CO (NH2) 2 content is twice of the theoretical value, the peak intensity of the sample reaches the highest value. Under the excitation of 327 nm UV light, the emission peak is single (λem = 470 nm) Is the characteristic emission of 4f65d → 4f7 of typical Eu2 + ions. The quenching concentration of activator ions Eu2 + is 7%. The quenching mechanism of the concentration is the electronic bipolar-bipolar interaction mode. Adding the appropriate amount of H3BO3 can improve the spectral emission intensity of the sample.