SrAl_2O_4:Eu^(2+),Dy^(3+)材料低温燃烧合成研究  

Research on Synthesis Techniques of Preparation of SrAl_2O_4: Eu^(2+),Dy^(3+) Luminescent Material by Low Temperature Combustion

作　　者：姜锋[1] 向周丹[1] 白兰[1] 陈小波[1] 刘甲祥 王小全 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]湖南稀土金属材料研究院,长沙410014

出　　处：《武汉理工大学学报》2009年第20期15-18,共4页Journal of Wuhan University of Technology

基　　金：长沙市科技重大专项(K080105-11)

摘　　要：采用低温燃烧合成了SrAl2O4:Eu2+,Dy3+发光材料,其发射波长为514 nm,2个主要激发波长为325 nm和365 nm,发光颜色为黄绿色。XRD分析表明产品的基质晶相为单斜晶系的SrAl2O4(PDF卡号:34-0379),晶粒尺寸为36.6 nm。研究了影响燃烧过程的因素,结果表明:燃烧过程主要受控于点火温度、原料配比和尿素用量等因素,低温燃烧合成方法具有点火温度低(550℃),能够简便、快捷地得到疏松、易粉碎的样品,不需要气氛保护,节能的优点。SrAl2O4：Eu^2＋ , Dy^3 ＋ luminescent material synthesized by low temperature combustion has two excitation peaks located at 325 nm and 365 nm, one emission peak located at 514 urn. Its luminescent color is yellow green. XRD analysis showes that the powders are nearly pure SrAl2O4 with very little other phases, the size of the grain is 36.6 nm. Further more, the influencing factors of combustion processes have been researched. The conclusion shows that： low temperature combustion method needs less time, low temperature（550 ℃ ）, less energy and no shielding gas. Loose and easily grinding powders can obtained fleetly. The main influence factors, of combustion processes are firing temperature, the mixture ratio of material and the dosage of urea.

关 键 词：低温燃烧法 SRAL2O4:EU^2+ DY^3+ 发光材料 稀土 

分 类 号：TB381[一般工业技术—材料科学与工程]