采用微波辐射法快速合成了 Dy3＋掺杂 Sr-MoO4黄色荧光粉.运用 X 射线衍射仪及荧光分光光度计对该荧光粉的物相结构及发光性能等进行了分析和表征.结果表明，所得的样品为四方晶系、白钨矿结构的钼酸盐，空间群为 I41/a.样品的激发光谱是由位于200~340 nm 的一个宽带和340~500 nm 的一系列尖峰构成.宽带吸收与 Mo-O 及 Dy-O 的电荷转移过程有关，最强峰位于284 nm 左右.340 nm 以后的吸收峰是由于 Dy3＋离子的 f-f 跃迁引起的.发射光谱由两个窄带组成：主峰位于576 nm 处的窄带属于 Dy3＋离子的4 F9/2→6 H13/2电偶极跃迁发射；另一个窄带位于480 nm左右，属于 Dy3＋离子的4 F9/2→6 H15/2跃迁发射，前者的强度远大于后者，因而，样品发黄光.同时，考察了 Dy3＋浓度、反应时间等对样品发光性能的影响.%Dy3 + doped SrMoO 4 yellow-emitting phosphors were synthesized rapidly by microwave radiation meth-od.The phase structure and luminescence properties of as-synthesized SrMoO 4 ∶Dy3 + were characterized and in-vestigated by X-ray diffraction and fluorescence spectrophotometer,respectively.The results indicate that the obtained products are pure monazite type molybdates with tetragonal system,belonging to space group I4 1/a. The excitation spectrum consists of a broad band in range of 200-340 nm and a series of sharp peaks between 340 and 500 nm.The broad band with a maximum at 284 nm was ascribed to the charge-transfer band (CTB)be-tween Mo-O and Dy-O;the sharp peaks belong to f-f transition of Dy3 + .The emission spectrum contains two narrow bands:the narrow band with main peak at around 576 nm originated from the electric dipole transition of 4 F9/2 →6 H 1 3/2 of Dy3 + ,and the other at around 480 nm originated from 4 F9/2 →6 H 1 5/2 transition of Dy3 + .The intensity of the former was much stronger than that of the latter,therefore,the samples show yellow emitting under the excitation of ultraviolet light.Meanwhile,the influences of doped-Dy3 + concentration and reaction time on luminescent properties of as-prepared samples were also discussed.
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