KMnF_3的熔盐法合成及掺铕体系的发光性质

Molten Salt Synthesis of KMnF_3 and Luminescent Property of KMnF_3∶Eu

采用简单的熔盐法合成了KMnF3单相样品及稀土离子铕掺杂的KMnF3(KMnF3∶Eu)荧光样品.X射线粉末衍射(XRD)表征结果显示,KMnF3属立方晶系,为AMF3型钙钛矿结构氟化物.对样品KMnF3∶Eu的发光性质进行了研究,荧光光谱分析结果表明,Mn2+,Eu2+与Eu3+这3个发光中心共存于KMnF3∶Eu体系中.讨论了改变掺入Eu离子的摩尔分数对Mn2+,Eu2+以及Eu3+发光强度的影响.

KMnF3 and europium-doped KMnF3 （ KMnF3 ： Eu） were prepared via a simple molten salt synthesis （MSS） method and the samples were characterized by X-ray diffraction and photoluminescence spectra. Fluo- rescence spectrum analysis indicates that three luminescence centers（ Mn2＋, Eu2＋ and Eu3.） coexist in KMnF3 ： Eu system. By changing the molar fraction of Eu, the luminous intensities of Mn2＋, Eu2＋ and Eu3＋ were fur- ther discussed.