Abstract In this study, undoped Y3Al5O12 (YAG) and neodymium (Nd3+) doped (Nd: YAG) powders were synthesized by Flame Spray Pyrolysis (FSP) for the first time in literature. The synthesized powders were investigated about structural, morphological, elemental and optical properties by using Thermogravimetric - Differential Thermal Analysis (DTA-TG), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Fourier Transformed Infrared Spectroscopy (FTIR), and photoluminescence spectroscopy (PL). The particle size range of undoped and Nd doped YAG powders produced by the FSP method was determined around 200–1100 nm. After calcination at 1000 °C, cubic YAG crystalline phases were successfully observed. The luminescence results as excitation, emission, and upconversion properties have been investigated for both undoped YAG (YG) and Nd3+ doped YAG with different dopant ratios as 1% (YG1), 3% (YG3) and %5 (YG5). When synthesized powders excited at 460 nm, the emission maxima observed at 540 nm and 808 nm. All YAG powders yielded bi-exponential decay curves. The highest decay time value was 1% Nd: YAG particle at 277 μs. Furthermore, these powders exhibited upconversion luminescence at lower wavelengths and higher energies when excited at 808 nm.

中文翻译：

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Nd: YAG 粉末通过火焰喷雾热解的合成、结构和光学表征

摘要 本研究首次采用火焰喷射热解法（FSP）合成了未掺杂的Y3Al5O12（YAG）和钕（Nd3+）掺杂的（Nd：YAG）粉末。通过使用热重 - 差热分析 (DTA-TG)、X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、X 射线光电子能谱 (XPS) 研究合成粉末的结构、形态、元素和光学性质、傅立叶变换红外光谱 (FTIR) 和光致发光光谱 (PL)。通过 FSP 方法生产的未掺杂和 Nd 掺杂的 YAG 粉末的粒度范围确定在 200-1100 nm 左右。在 1000 °C 煅烧后，成功观察到立方 YAG 晶相。发光结果为激发、发射、对未掺杂的 YAG (YG) 和 Nd3+ 掺杂的 YAG 的上转换和上转换特性进行了研究，掺杂比例分别为 1% (YG1)、3% (YG3) 和 %5 (YG5)。当合成粉末在 460 nm 激发时，发射最大值在 540 nm 和 808 nm 处观察到。所有 YAG 粉末都产生双指数衰减曲线。最高衰减时间值为 1% Nd:YAG 粒子，时间为 277 μs。此外，当在 808 nm 激发时，这些粉末在较低波长和较高能量下表现出上转换发光。