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Mechanochemical synthesis of an efficient nanocrystalline BaFBr:Eu2+ X-ray storage phosphor

机译：机械化学合成高效纳米晶BaFBr：Eu2 + X射线存储荧光粉

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摘要

A straightforward and direct preparation route for nanocrystalline BaFBr:Eu2+ by ball-milling is reported. We demonstrate that the as-prepared nanocrystalline powder becomes an efficient photostimulable X-ray storage phosphor upon annealing at temperatures in the range of 400 to 900 degrees C. The dependence of crystallite size, photoluminescence and storage phosphor properties on annealing temperature and annealing time was investigated and the optimal conditions were determined. After annealing at 900 degrees C for 1 h, the average crystallite size was found to be similar to 200 nm. In comparison with the typical similar to 5 mu m particles for conventional phosphors, the shape and size distribution of the crystallites may allow higher packing densities, resulting in higher sensitivities, and resolution in computed radiography. The photostimulable storage properties compare favorably with results obtained for a commercial BaFBr(I):Eu2+ imaging plate.
机译：报道了通过球磨法直接制备纳米晶BaFBr：Eu2 +的直接方法。我们证明，所制备的纳米晶体粉末在400至900摄氏度的温度范围内退火后，成为一种有效的可光激发X射线存储磷光体。晶粒尺寸，光致发光和存储磷光体性质对退火温度和退火时间的依赖性为调查并确定最佳条件。在900摄氏度下退火1小时后，发现平均晶粒尺寸类似于200 nm。与用于常规磷光体的典型的类似于5μm的颗粒相比，微晶的形状和尺寸分布可以允许更高的堆积密度，从而导致更高的灵敏度和计算机射线照相的分辨率。可光激发的存储特性与商业BaFBr（I）：Eu2 +成像板获得的结果相比具有优势。

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