本文關(guān)鍵詞： YO 水解氧化 熒光粉　出處：《上海大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期 　論文類(lèi)型：期刊論文

【摘要】：采用水解氧化法制備Y_2O_3稀土材料,其工藝特點(diǎn)是先將稀土釔與石墨在真空感應(yīng)爐中熔煉得到碳化釔合金,再經(jīng)水解、熱處理后即可得到Y(jié)_2O_3粉末.采用X射線衍射(X-ray diffration,XRD)等測(cè)試手段對(duì)所制備的Y_2O_3粉末的組成、微觀結(jié)構(gòu)和熒光性能等進(jìn)行了研究,得到以下結(jié)果:將碳化釔合金研碎成1 mm左右的顆粒,并與去離子水按質(zhì)量濃度比為1∶20配置,將PEG-400與去離子水按體積比為8∶100比例配置,放置于磁力恒溫?cái)嚢杵魃?在25?C下攪拌24 h后抽濾、洗滌,在80?C烘箱中烘干后得到Y(jié)(OH)_3粉末,最后經(jīng)過(guò)400～1 000?C熱處理后得到Y(jié)_2O_3粉末.碳化釔合金水解后得到的Y(OH)_3粉末經(jīng)過(guò)400?C熱處理后得到PDF卡片編號(hào)為No.65-3178的立方晶型Y_2O_3,但需要繼續(xù)加熱到800?C后才具有熒光性能.由此工藝制得的Y_2O_3熒光粉在激發(fā)波長(zhǎng)為355 nm的氙光照射下,在430～600 nm波長(zhǎng)范圍內(nèi)分別在468和578 nm處有明顯的熒光峰出現(xiàn),且所發(fā)的光為藍(lán)白光.樣品的發(fā)光機(jī)理是由于C元素在Y_2O_3晶格中形成COOY和C—OY這兩種結(jié)構(gòu)斷裂后,所引起的光電子耦合所致.
[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.
【作者單位】： 上海市質(zhì)量監(jiān)督檢驗(yàn)技術(shù)研究院;上海大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：國(guó)家質(zhì)量基礎(chǔ)共性技術(shù)研究與應(yīng)用重點(diǎn)專(zhuān)項(xiàng)資助項(xiàng)目(2016YFF0204506)
【分類(lèi)號(hào)】：TQ422

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本文編號(hào)：1544164