水解氧化法制备氧化钇荧光粉及样品荧光性能

发布时间：2018-02-27 20:18

本文关键词： YO 水解氧化荧光粉　出处：《上海大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【摘要】：采用水解氧化法制备Y_2O_3稀土材料,其工艺特点是先将稀土钇与石墨在真空感应炉中熔炼得到碳化钇合金,再经水解、热处理后即可得到Y_2O_3粉末.采用X射线衍射(X-ray diffration,XRD)等测试手段对所制备的Y_2O_3粉末的组成、微观结构和荧光性能等进行了研究,得到以下结果:将碳化钇合金研碎成1 mm左右的颗粒,并与去离子水按质量浓度比为1∶20配置,将PEG-400与去离子水按体积比为8∶100比例配置,放置于磁力恒温搅拌器上,在25?C下搅拌24 h后抽滤、洗涤,在80?C烘箱中烘干后得到Y(OH)_3粉末,最后经过400～1 000?C热处理后得到Y_2O_3粉末.碳化钇合金水解后得到的Y(OH)_3粉末经过400?C热处理后得到PDF卡片编号为No.65-3178的立方晶型Y_2O_3,但需要继续加热到800?C后才具有荧光性能.由此工艺制得的Y_2O_3荧光粉在激发波长为355 nm的氙光照射下,在430～600 nm波长范围内分别在468和578 nm处有明显的荧光峰出现,且所发的光为蓝白光.样品的发光机理是由于C元素在Y_2O_3晶格中形成COOY和C—OY这两种结构断裂后,所引起的光电子耦合所致.
[Abstract]:Ys _ 2O _ 3 rare earth material was prepared by hydrolytic oxidation method. Its process characteristic is that yttrium carbide is first melted with graphite in vacuum induction furnace to obtain yttrium carbide alloy, and then hydrolyzed. After heat treatment, Ys _ 2O _ 3 powder can be obtained. The composition, microstructure and fluorescence properties of the prepared Ys _ 2O _ 3 powder were studied by X-ray diffraction and X-ray diffraction (XRD). The following results are obtained: grinding yttrium carbide alloy into about 1 mm particles and collocating with deionized water at 1:20 in mass concentration ratio, PEG-400 and deionized water are arranged in proportion of 8: 100 by volume, and placed on magnetic thermostat agitator. C after stirring for 24 hours, filter, wash, in 80? After drying in the oven, we got YOHH3 powder, and finally passed through 400? 1 000? After heat treatment, Ys _ 2O _ 3 powder was obtained from C heat treatment, and Ys _ 2O _ 3 powder was obtained by hydrolysis of yttrium carbide alloy. C after heat treatment, the cubic crystal type Y2OC of PDF card number No.65-3178 is obtained, but it needs to be heated to 800? Ys _ 2O _ 3 phosphors produced by this method have obvious fluorescence peaks at 468 nm and 578 nm, respectively, under the irradiation of xenon light at 355 nm. The luminescence mechanism of the sample is due to the photoelectron coupling caused by the formation of COOY and C-OY in Ys _ 2O _ 3 lattice.
【作者单位】：上海市质量监督检验技术研究院;上海大学材料科学与工程学院;
【基金】：国家质量基础共性技术研究与应用重点专项资助项目(2016YFF0204506)
【分类号】：TQ422

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