BaO-TiO2-3SiO2∶Eu^(3＋)发光材料的结构与发光性质的研究  

Structure and Luminescent Properties of BaO-BaO-TiO_2-3SiO_2∶Eu^(3+)

作　　者：李晶晶[1] 王喜贵[1] 张岚[1] 王艳鑫[1] 付道彬[1] 

机构地区：[1]内蒙古师范大学化学与环境科学学院,功能材料物理与化学自治区重点实验室,内蒙古呼和浩特010022

出　　处：《稀土》2013年第3期20-25,共6页Chinese Rare Earths

基　　金：国家自然科学基金资助项目(20161001);内蒙古自治区自然科学基金资助项目(2010MS0205);内蒙古师范大学科研创新基金项目(CXJJS10041,ZRYB09004)

摘　　要：采用溶胶-凝胶法制备了BaO-TiO2-3SiO2∶Eu3+发光材料,通过DTA-TG、IR、XRD、SEM、激发和发射光谱图对材料的结构和发光性能进行了研究。结果表明,100℃～200℃之间出现明显失重现象,说明在此过程中凝胶中的吸附水和乙醇等有机物大量挥发,600℃出现失重阶梯并放出热量,发生晶型转变;制备的样品中主要存在Ti-O-Si和Ti-O键;XRD测试证明,材料主要在600℃～1000℃之间发生晶型转变,当经800℃退火处理后,主要以Ba2TiSi2O8晶体结构存在时,材料发光最好。材料制备的最佳退火温度为800℃,Eu3+在BaO-TiO2-3SiO2基质中的掺杂量为1.80%(摩尔分数),发光最好。在612 nm监测波长下,测得的最佳激发波长为可见光465 nm,即在465 nm光激发下,材料发射强度高、单色性好的红光。Eu^3＋-doped BaO-TiO2-3SiO2 luminescent materials were preparated by Sol-Gel method.The crystal structure and the luminescent properties of the samples were measured and characterized by DTA-TG,IR,XRD and excitation and emission spectra,respectively.The DTA-TG indicated that there was a significant weight loss between 100 and 200 ℃,which was attributed to the volatilization of water and organic matter.The crystal structure changed due to weight loss and a weak exothermic peak at 600 ℃.The IR spectra showed that the samples are mostly composed of Ti-O-Si and Ti-O bonds.Powder XRD analysis indicated that the crystal structure of the materials changed to Ba2TiSi2O8 between 600 and 1000 ℃,and the luminescence intensity of the materials is optimal when the annealing temperature was 800 ℃.The excitation and emission spectra showed that the best annealing temperature is 800 ℃ for preparing material and the optimum doping amount of Eu^3＋ is 1.80（at%）.The best excitation light is the visible light with the wavelength of 465nm when the wavelength of the monitoring light is 612 nm.

关 键 词：溶胶-凝胶法 BaO-TiO2-3SiO2∶Eu3+ 发光材料 

分 类 号：O644.19[理学—物理化学]