Preparation and luminescent properties of Yb3+∶Y2O3ultrafine powders by low-temperature combustion synthesis
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摘要:以稀土硝酸盐和尿素(摩尔分数为1∶3)为原料,采用低温燃烧法在点火温度为600 ℃,热处理温度为1 100 ℃,热处理时间为1 h条件下制备了Yb3+∶Y2O3超细粉体。利用X射线粉末衍射仪(XRD)、扫描电子显微镜(SEM)和荧光光谱仪(FS)对粉体进行了表征。研究了点火温度、燃料用量和热处理温度对粉体性能的影响。实验结果表明:所制备的Yb3+∶Y2O3超细粉体的粒径为15~30 nm,颗粒分散性较好,无明显团聚,且粉体的发光性能良好,发射峰位于976,1 030和1 075 nm,适合于制备Yb3+∶Y2O3透明陶瓷。Abstract:Yb3+∶Y2O3 ultrafine powders were prepared by using the low-temperature combustion synthesis(LCS) with the solutions of mixed nitrates and urea in mol concentration ratio of 3∶1 and at a ignition temperature about 600 ℃. The Yb3+∶Y2O3 ultrafine powders were measured by using a X-ray Diffractometer(XRD), a Scanning Electron Microscope(SEM) and a Fluorescence Spectrometer(FS). The influences of ignition temperature, fuel content and calcination temperature on the characteristics of the powders were investigated. The experimental result shows that the grain diameter of as-prepared powders is about 15-30 nm, and the grain dispersion is good without obvious agglomeration. Moreover the fluorescence performace of the powders is well, and the emission peaks are located at 976, 1 030 and 1 075 nm. As a result, the Yb3+∶Y2O3 ultrafine powders can be propitious to the preparation of Yb3+∶Y2O3 transparent ceramics.
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