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中文摘要：
采用高温固相反应合成了适合近紫外光-蓝光激发的K_2MgSiO_4：Eu^（3＋）红色荧光粉,并对其发光特性进行了研究。X射线衍射（XRD）测试结果表明,合成样品为纯相晶体。样品激发光谱由O2-→Eu^（3＋）电荷迁移带波长为（200-350nm）和Eu^（3＋）的特征激发峰（波长为350-500nm）组成,主峰位于396nm波长处,次级峰位于466nm波长处。在396nm和466nm波长分别激发下,样品发射峰均由Eu^（3＋）的5D0→7FJ（J=0,1,2,3,4）能级跃迁产生,其中619nm波长处发射强度最大。随着Eu^（3＋）掺杂浓度的增加,荧光粉的发光强度增大。在实验测定的浓度范围内,未出现浓度猝灭现象。样品的色坐标位于红光区,且非常接近NTSC标准。样品发光强度随温度增加出现温度猝灭现象,发射峰位置并未出现明显红移。样品中,Eu^（3＋）在5D0能级上的荧光寿命约为0.53508ms。
英文摘要：
The red phosphor K_2MgSiO_4 ：Eu^3＋ which can be effectively excited by ultraviolet and blue light was synthesized by high temperature solid state reaction, and its luminescent characteristics were also investigated. The principal crystalline phase of the samples is K_2 MgSiO_4. The excitation spectra of the sample consist of O^2----Eu^3＋ charge transitions （200-350 nm） and Eu^3＋ ion excitation peak （350 -500 nm）. The maximum peak appears at 396 nm and the second peak appears at 466 nm. The phos phor presents several emission peaks under 396 nm, and 466 nm excitation, respectively, which corre spond to the 5 D0---7 Fj （J = 0,1,2,3,4） transition of Eu^3＋ , and the strongest emission is located at 619 nm. The luminescent intensity increases with the increase of Eu3＋ content. The concentration quenching does not occur. The Commission Internationale de L＇Eclairage （CIE） coordinates of Ke MgSiO4 ：Eua are very close to the National Television Standards Committee （NTSC） standard. The temperature quenching occurs with increasing temperature,but there is no emission peak red-shift. Fluorescence life- time of this sample is about 0. 535 08 ms.
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