柠檬酸用量在燃烧法合成Y_2O_2S:Eu^(3+),Mg^(2+),Ti^(4+)中的影响  

The Effects of Citric Acid Dosage on Combustion Synthesis of Y_2O_2S:Eu^(3+),Mg^(2+),Ti^(4+)

作　　者：李向果[1] 李延垒[1] 梁振华[2] 彭桂花[2] 

机构地区：[1]河南质量工程职业学院食品化工系,河南平顶山467000 [2]广西师范大学化学化工学院,广西桂林541004

出　　处：《河南科学》2012年第5期564-567,共4页Henan Science

基　　金：河南省科学技术厅自然科学基金(9412010Y1385)资助

摘　　要：研究了柠檬酸用量在溶液燃烧法合成Y2O2S:Eu3+,Mg2+,Ti4+中的影响,采用X射线衍射(XRD)、扫描电镜(SEM)、屏幕亮度计对样品进行了表征.研究结果表明,当柠檬酸与Y3+的物质的量比为1.4时,燃烧反应较缓和,样品为灰白色,X衍射谱线峰型尖锐,扫描照片显示其为形貌规则、边界清晰、分布均匀、厚度为50～80 nm、直径为200～300 nm的纳米片,发光亮度最好.The effects of citric acid dosage on combustion synthesis of Y2O2S：Eu^3＋,Mg^2＋,Ti^4＋ were studied.The phase composition,morphology and the brightness were investigated by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,screen luminance meter（SLM）.The results showed that the combustion reaction was mild,the sample was grey white,X diffraction spectrum was sharp;SEM micrographs showed that the pattem of the sample was circular nanometer sheets with thickness in range of 50～80 nm and diameter in range of 200～300 nm,the shape was rule,boundary was clear,distribution was uniform,and its luminescence intensity reached maximum when molar ratio r=1.4（n（citric acid）/n（Y^3＋）=1.4）.

关 键 词：柠檬酸 红色长余辉 燃烧合成 硫氧化钇 

分 类 号：O482.31[理学—固体物理]