本文關(guān)鍵詞： 有機(jī)物凝膠 熔鹽 片狀結(jié)構(gòu) 氧化鋁 功能材料　出處：《精細(xì)化工》2017年06期 　論文類型：期刊論文

【摘要】：采用有機(jī)物凝膠-熔鹽法制得片狀氧化鋁,通過熱分析、XRD、SEM、EDS、激光粒度分析等手段,考察了不同有機(jī)物、不同助熔劑、不同保溫時間對片狀氧化鋁形貌的影響,并探討了片狀氧化鋁的生長機(jī)制及其Cr~(3+)摻雜熒光發(fā)射性能。結(jié)果表明,以聚乙二醇600為有機(jī)物凝膠、NaCl和K_2SO_4為助熔劑、1 150℃下煅燒3 h效果最佳,所得片狀氧化鋁六角形貌完整,分散均勻,平均尺寸13.6μm,徑厚比21.4。片狀氧化鋁晶體生長初期受界面反應(yīng)控制,后期受螺旋位錯控制,隨保溫時間延長片狀氧化鋁厚度增厚呈板狀結(jié)構(gòu),x(Cr~(3+))=5%摻雜不同形貌氧化鋁熒光光譜表明,片狀氧化鋁發(fā)光強(qiáng)度達(dá)到8 000 a.u.,遠(yuǎn)高于顆粒狀氧化鋁晶粒。
[Abstract]:The flake alumina was prepared by organic gel-molten salt method. By means of thermal analysis and laser particle size analysis, the effects of different organic compounds, different fluxes and different holding time on the morphology of flake alumina were investigated. The growth mechanism of flake alumina and its Cr~(3) -doped fluorescence emission properties were discussed. The results showed that the best results were obtained by calcining polyethylene glycol 600 as organic gels NaCl and K _ 2SO _ 4 as flux at 1 150 鈩，

本文編號：1534802