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首页> 外文期刊>Optical Materials >Morphological and optical investigation of Y_2O_3:SiO_2 powder by wet chemical process
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Morphological and optical investigation of Y_2O_3:SiO_2 powder by wet chemical process

机译：Y_2O_3：SiO_2粉末的湿化学法形貌和光学研究

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Nanocrystalline yttrium oxide-silica has been successfully synthesized by wet chemical process. Y (NO_3)_3·4H_2O and TEOS were used as precursors and obtained powdered form of Y_2O_3:SiO_2 binary oxide. The powdered samples were annealed at 250 ℃ and 500 ℃ temperature and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, Photoluminescence (PL) and Transmission electron microscopy (TEM). The XRD results predicted that the as-prepared sample has mixed phase of Y(NO_3)(OH)_3 and Si(OH)_2. However, cubic yttrium oxide phase alone is found for annealed sample with average grain size ～8 nm at 500 ℃ (6 h). Sample analyzed by FTIR and TEM confirmed the grain size dependency on sintering temperature. From the UV-Vis spectra, it is found that the position of the absorption peak is shifted towards the lower wavelength side with sintering temperature. In the PL spectra, the broad emission band is centered at 585 nm.
机译：纳米氧化钇二氧化硅已通过湿法化学方法成功合成。以Y（NO_3）_3·4H_2O和TEOS为前驱物，得到粉状的Y_2O_3：SiO_2二元氧化物。将粉末状样品在250℃和500℃的温度下进行退火，并通过X射线衍射（XRD），傅里叶变换红外光谱（FTIR），紫外可见光谱，光致发光（PL）和透射电子显微镜（TEM）进行表征。 XRD结果预测所制备的样品具有Y（NO_3）（OH）_3和Si（OH）_2的混合相。然而，在500℃（6 h）时，平均晶粒尺寸约为8 nm的退火样品仅发现立方氧化钇相。通过FTIR和TEM分析的样品证实了晶粒尺寸与烧结温度有关。从UV-Vis光谱发现，随着烧结温度，吸收峰的位置向较低波长侧移动。在PL光谱中，宽发射带集中在585 nm。

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