用一步法合成Ba0.905Ca0.845Mg0.25SiO4：xEu^2＋,yMn^2＋白光荧光粉及其发光性能  

Synthesis of Ba_(0.905)Ca_(0.845)Mg_(0.25)SiO_4:xEu^(2+),yMn^(2+) White-Light Phosphors with the Single-Stage Method and Their Luminescent Properties

作　　者：陈永杰[1] 李郎楷[1] 肖林久[1] 郑志辉[1] 谢颖[1] 

机构地区：[1]沈阳化工大学,辽宁省稀土化学及应用重点实验室,沈阳110142

出　　处：《硅酸盐学报》2011年第6期908-912,共5页Journal of The Chinese Ceramic Society

基　　金：辽宁省科技厅科研项目计划(2006223004);辽宁省教育厅科研项目计划(LS2010120)资助项目

摘　　要：采用高温固相法合成一系列碱土硅酸盐Ba0.905Ca0.845Mg0.25SiO4:xEu2+,yMn2+(x、y为摩尔比)荧光粉。探讨烧结温度、时间、助熔剂BaCl2和Eu2+及Mn2+掺量对荧光粉发光性能的影响。通过热重-差热分析确定荧光粉的合成温度,用X射线衍射、扫描电子显微镜和荧光光谱表征荧光粉的结构、形貌和发光性能。1 000～1 100℃合成的Ba0.905Ca0.845Mg0.25SiO4:Eu2+荧光粉具有Ba1.31Ca0.69SiO4和BaCa2Mg(SiO4)2晶相、在300～410 nm有强吸收,可与紫光InGaN基发光二极管芯片(340～420 nm)匹配,在紫光激发下,发射覆盖蓝光到红光连续光谱的白光,可很好地应用于白光发光二极管。A series of Ba0.905Ca0.845Mg0.25SiO4：xEu2＋,yMn2＋ phosphors were synthesized by the high-temperature solid-state reaction method.Influence of firing temperature and time,fluxing agent BaCl2 and dosages of Eu2＋ Mn2＋ on luminescence properties were investigated.A better preparation temperature was determined by the thermogravimetric-differential thermal analysis,and mor-phology,topography and luminescence properties of the phosphors were checked by the X-ray diffraction,scanning electron micros-copy and fluorescence spectra,respectively.The Ba0.905Ca0.845Mg0.25SiO4：Eu2＋ phosphors synthesized under 1 000-1 100 ℃ have both Ba1.31Ca0.69SiO4 and BaCa2Mg（SiO4）2 phases.Ba0.905Ca0.845Mg0.25SiO4：xEu2＋,yMn2＋ phosphors have a strong absorption for ultraviolet（UV） light between 300 nm and 410 nm,and are comparable to UV InGaN-based light-emitting diodes（LED） chips（340-420 nm）.These phosphors can emit white light with a continuous spectrum under UV light excitation,covering from blue light to red-light,and can be better applied in white LEDs.

关 键 词：白光荧光粉 碱土硅酸盐 发光二极管 

分 类 号：TQ422[化学工程] TQ630.6