NaY(WO4)2:Sm3+粉末的制备及荧光性能

以柠檬酸三钠为结合剂,采用水热法结合高温烧结两步法制备了一系列NaY_1-x(WO₄)₂:xSm³⁺(x=0、0.005、0.010、0.015、0.020、0.025、0.030)粉末。通过X射线衍射(XRD)、扫描电镜(SEM)、红外光谱(FT-IR)和荧光性能(PL)对粉末的相结构、形貌、成分以及发光性能进行了表征。研究结果表明,所合成粉末为NaY(WO₄)₂的纯相,属四方晶系白钨矿结构,其形貌为3D花形。在405 nm的光激发下,NaY(WO₄)₂:Sm³⁺粉末在600 nm处具有最高的荧光强度,对应于Sm³⁺的⁴G_5/2→⁶H_7/2磁偶极跃迁,观察到橙红光发射,且Sm³⁺最佳掺杂摩尔分数为0.015时,粉末显示出最强的荧光发射强度。

Preparation and Luminescent Properties of NaY(WO4)2:Sm3+ Powders

A series of self-assembled 3D flower-like NaY_1-x(WO₄)₂∶x Sm³⁺(x=0,0.005,0.010,0.015,0.020,0.025,0.030)powders were prepared by hydrothermal method and high temperature sintering,with trisodium citrate as the anchoring agent.The phase structure,morphology,composition and luminescence properties were characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM),infrared spectrum(FT-IR)and photoluminescence spectroscopy(PL),respectively.The results show that the synthesized samples are pure NaY(WO₄)₂ with tetragoonal scheelite structure.NaY(WO₄)₂∶Sm³⁺powders can be excited by a wavelength of 405 nm and exhibit a strong orange-red emission at 600 nm,corresponding to the ⁴G_5/2→⁶H_7/2 magnetic dipole transition of Sm³⁺.The optimum doping molar fraction of Sm³⁺is determined to be of 0.015 based on the maximum intensity of fluorescence emission.