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采用固相法在较温和的反应温度下合成了Eu3+掺杂铝硅酸钾发光材料,利用粉末X射线衍射仪(XRD)、扫描电子显微镜(SEM)、热分析仪(TG-DTA)、紫外-可见光谱、荧光光谱仪(PL)等手段对合成的样品进行表征。结果表明:在450,550,650,750℃下合成的KAlSiO4:Eu3+为无定形态,但其形貌受温度的影响较大,450℃下合成的样品分散性较好,其他温度下得到样品的形貌为块状团聚体;在394 nm的紫外光激发下,样品主要表现出掺杂Eu3+的特征发射(5D0→7F1和5D0→7F2跃迁),在650℃合成的样品的发射光谱强度最强,其荧光衰减曲线符合双指数衰减行为,经拟合平均荧光寿命为0.40 ms。
Eu3 + doped potassium aluminosilicate luminescent materials were synthesized by the solid-state reaction at a mild reaction temperature. The structure of the luminescent materials were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), thermal analysis (TG-DTA) - Visible spectroscopy, fluorescence spectroscopy (PL) and other means of the synthesized samples were characterized. The results show that KAlSiO4: Eu3 + synthesized at 450,550,650,750 ℃ is in an amorphous state, but its morphology is greatly affected by temperature. The samples synthesized at 450 ℃ have better dispersibility, and the samples obtained at other temperatures are in the form of massive (5D0 → 7F1 and 5D0 → 7F2 transitions). The emission spectra of the samples synthesized at 650 ℃ are the strongest, and their fluorescence decay curves Complying with the dual exponential decay behavior, the average fluorescence lifetime after fitting was 0.40 ms.