【摘要】 本文采用固相反应的方法合成了一系列（Ce,Gd,Mn）MgB₅O₁₀磷光体。观察到合成温度、灼烧时间、原料配比对磷光体的形成和发光亮度有重要影响。X射线衍射分析表明,磷光体结构与LaMgB₅O₁₀相同,属单斜晶系、空间群P2_1/c。用EPR确定了磷光体中锰离子为二价。测定了(Ce_0.2La_0.2)MgB₅O₁₀,(Gd_0.7La_0.3)MgB₅O₁₀,(Mn_0.05La_0.95)MgB₅O₁₀,(Ce_0.2Mn_0.05La_0.75)MgB₅O₁₀,(Gd_0.95Mn_0.05)MgB₅O₁₀、(Ce_0.2Gd_0.8)MgB₅O₁₀和(Ce_0.2Gd_0.75Mn_0.05)MgB₅O₁₅等磷光体的光谱。根据光谱数据讨论了(Ce_0.2Gd_0.75Mn_0.05)MgB₅O₁₀磷光体中能量传递过程为:Ce³⁺→Mn²⁺,Gd³⁺→Mn²⁺以及Ce³⁺→Gd³⁺→Mn²⁺,其中Ce³⁺离子可将能量高效地传递给Gd³⁺,Gd³⁺离子起着中间体的作用。更多还原

【Abstract】 A scries of (Ce, Gd, Mn)MgK5O10 phospnors nave Dccn synthesized by solid state reaction method. The influences of the temperature,the fire time and the ratio of the raw material were investigated. X-ray diffraction patterns show that the structure of (Cc, Gd, Mn)MgB5O10 is the same as that of LaMgB5O10 and both of them belong to monoclinic System, space group P21/c.The EPR results show that the manganese ion has a valency of two in (Cr, Gd, Mn)MgB6O10.The spectra of (Ce0:2La0:8) MgB6O10, (Gdo:7Lao:3) MgB5O10,( Mn0:05 La0:95)MgB5O10, (Ceo:zMno:oBLa0:75)MgBBO,0, (Gd0:59Mno:06 )MgB5O10, (Ceo:2Gdo:8)MgB5O10 and (Ce0:2Mn0:05La0:75)MgB5O10 have been measured. The spectra show that the processes of energy transfer in the phosphors are Ce3+-Mn2+, Gd3+-Mn2 + and Ce3+-Gd3+-Mn2 + ,更多还原