Abstract Nano crystalline powders of LuAG:Eu with different grain sizes were prepared by Pechini and co-precipitation methods. XRD and FTIR analyses were done. The XRD measurement confirmed the cubic structure of nano crystalline powders. The morphology and grain size of nano crystalline powders were confirmed by TEM analysis. The minimum and maximum of crystallite sizes were obtained 17 and 46 nm by the Rietveld method. The results of UV–Visible absorption analysis showed that the energy absorption value was increased for nano crystalline powder prepared at 900-1200 °C by Pichini and co-precipitation methods. The emission, excitation and quantum efficiency were investigated. The overall shape of emission and excitation spectra was not changed with increasing of nano crystalline powder size but the emission intensities were increased. Decay time was decreased with increasing the size of nano crystalline powders. The X-ray luminescence results were examined at room temperature for different currents and a constant voltage. The luminescence intensity was increased linearly with increasing the X-ray current. TL glow curves of nano crystalline powder exposed to X-rays for 2, 4 and 6 min showed two main peaks around 400 and 600 K. A glow curve deconvolution and origin software were used to calculate TL kinetic parameters.

中文翻译：

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LuAG:Eu3+纳米晶粉的光致发光和辐射发光特性

摘要 采用Pechini法和共沉淀法制备了不同粒径的LuAG:Eu纳米晶粉体。进行了 XRD 和 FTIR 分析。XRD 测量证实了纳米晶体粉末的立方结构。纳米晶体粉末的形貌和晶粒尺寸通过 TEM 分析得到证实。通过 Rietveld 方法获得了 17 和 46 nm 的最小和最大微晶尺寸。紫外-可见吸收分析结果表明，在 900-1200 °C 下通过 Pichini 和共沉淀方法制备的纳米晶粉末的能量吸收值增加。研究了发射、激发和量子效率。发射和激发光谱的整体形状没有随着纳米晶粉末尺寸的增加而改变，但发射强度增加。衰减时间随着纳米晶体粉末尺寸的增加而减少。在室温下检查不同电流和恒定电压下的 X 射线发光结果。发光强度随着X射线电流的增加而线性增加。暴露于 X 射线 2、4 和 6 分钟的纳米晶体粉末的 TL 辉光曲线显示在 400 和 600 K 附近有两个主峰。辉光曲线解卷积和原点软件用于计算 TL 动力学参数。