【摘要】 采用高温固相法制备得到了一系列Li₂Mg₃TiO₆:xSm³⁺（0.005≤x≤0.010）橙红色荧光粉。通过X射线衍射仪（XRD）对其物相结构进行分析，扫描电子显微镜（SEM）对其进行微观形貌表征，荧光光谱仪（PL）进行发光性能测试。结果表明：高温固相法制备Li₂Mg₃TiO₆:Sm³⁺物相纯净，颗粒分布均匀，平均粒径尺寸为3μm。Li₂Mg₃TiO₆:Sm³⁺的主激发峰位于344 nm,主发射峰位于677 nm,最佳掺杂浓度为5%。在温度为350 K时，样品的发光强度仍能保持室温的63.5%,热激活能ΔE=0.363 eV。通过CIE计算得到Li₂Mg₃TiO₆:0.05Sm³⁺的色坐标位于（0.630 8, 0.358 4）红光区域。封装得到LED器件发出显色性较好的红光，显色指数Ra=86, Li₂Mg₃TiO₆:Sm³⁺红色荧光粉有望应用于白光LED。更多还原

【Abstract】 A series of Li₂Mg₃TiO₆:xSm³⁺（0.005≤x≤0.010） orange-red phosphors was prepared using the high-temperature solid-state method. The luminescent transition mechanism of the phosphor was analyzed, and the packaging of LED devices was conducted. The results indicate that the Li₂Mg₃TiO₆:Sm³⁺ prepared by the high-temperature solid-state method has a pure phase, uniform particle distribution, and an average particle size of 3 μm. The main excitation peak of Li₂Mg₃TiO₆:Sm³⁺ is 344 nm, and the main emission peak is 677 nm, with an optimal doping concentration of 5%. At 350 K, the relative luminescent intensity of the sample is 63.5%, and the thermal activation energy ΔE is 0.363 eV. The color coordinates of Li₂Mg₃TiO₆:0.05Sm³⁺ calculated by CIE are located in the red-light region（0.630 8, 0.358 4）. The packaged LED device emits red light with good color rendering Li₂Mg₃TiO₆:Sm³⁺ red phosphor is expected to be used in white light LEDs.更多还原