【作者】 龚兵勇；

【导师】 柏朝晖； 田一光；

【作者基本信息】 长春理工大学 ， 材料学， 2007， 硕士

【摘要】 本论文针对目前各发光材料的发光颜色单一、亮度不高、稳定性差等特点，旨在开发出一种全新型的发光材料。通过高温固相法合成了一系列Eu²⁺激活的碱土金属铝硅酸盐发光材料MeAl₂Si₂O₈：Eu²⁺，Dy³⁺（Me=Mg，Ca，Sr，Ba）。X射线衍射分析表明，此类发光材料基质的主要物相组成为物理与化学性能稳定的长石结构硅酸盐。结合荧光光谱、差热-热重、红外光谱及扫描电镜等现代分析测试手段，研究了Mg²⁺取代长石结构中部分阳离子，及掺杂Dy³⁺、Nd³⁺、Mn²⁺等与Eu²⁺形成共激活对晶体结构和发光性能的影响。 研究发现，Eu²⁺激活的长石基发光材料均有很好的发光性能，发光颜色白色发光，发光亮度高。通过Eu²⁺和Mn²⁺之间的能量传递，可得到较纯的白色发光，且呈现出较长的余辉寿命。 Eu²⁺激活的碱土金属铝硅酸盐作为发光材料基质具有物理和化学性质稳定性好，发光强度大等特点，在陶瓷发光釉料、大功率LED照明等领域必将开辟一片出诱人的新天地。更多还原

【Abstract】 The object of this paper is to develop a kind of new phosphor in order to overcome the shortcoming of present luminescent materials such as single luminescence color, low luminosity, low stability, etc. A series of Eu -actived alkaline-earth metals aluminasilicate phosphors, which is MeAl₂Si₂O₈: Eu²⁺, Dy³⁺ （Me=Mg, Ca, Sr, Ba）, have been synthesized through high temperature solid-phase method. X-ray diffraction analysis indicate that the main constitutes of the hot phase of this kind of materials are feldspar whose physical and chemical performance are fairly stable. By means of modern analysis and testing tools such as flurescence spectrum, TG-DTA, FTIR and SEM, the influence of some aspects to the crystal constitution and luminescence performance of materials have been investigated, such as the substitution of parts of cation of feldspar for Mg²⁺ and adulterating cations, for example, Dy³⁺ Nd³⁺ Mn²⁺ ions, to active luminescence ions in materials together with Eu²⁺ ion. It was found that all of Eu²⁺-actived feldspar radix-phase luminescence materials have good luminescence performance which can emit white and high brightness light, and pure white light can be gained through energy transfer between Eu²⁺ and Mn²⁺ions and its afterglow is fairly long.Eu²⁺-actived alkaline-earth metals aluminasilicate phosphors have many good characteristic such as stable physical and chemical property and high luminescence strength. And it shows great possibility for application in fields such as luminescent ceramic glaze and high-power LED illumination.更多还原