Ce^3＋,Sb^3＋共激活的亚超细磷光体的微波快速合成和发光特性

首次采用微波辐射法快速合成了亚超细CaS:C^3 ,Sb^3 高效绿光磷光体，发现Ce^3 与Sb^3 离子之间存在着能量传,租是属于多极子相互作用的共振传递，因而Ce^3 对CaS:Sb^3 的发光有明显的敏化和增强。微波场作用下合成的双掺磷光体的激发峰与发射峰值分别恒定在259nm 和523nm处，并没有像传统高温固相合成法那样，随掺杂离子浓度的增大而发生红移现象。SEM照片显示，采用含不同一价阳离子（Na^ ,K^ ,NH4^ )无机盐作助熔剂制得的亚超细CaS:Ce^3 ,Sb^3 磷光体平均粒径为300nm-500nm，但其晶体形貌分别为立方形、球形和团聚状的雪花形，其中球形磷光体荧光最强。

3+,Sb3+ Phosphor with Submicron-scale by Microwave Radiation Method and Its Luminescence

CaS:Ce 3+ ,Sb 3+ phosphors with the green color were firstly synthesized by microwave radiation method. The phosphor materials have been characterized by XRD?SEM and the fluorescent spectroscopy. The result shows that the CaS:Ce 3+ , Sb 3+ phosphors possess the cubic structures. The different shapes and submicro scales of the phosphors can be obtained upon doping the different fluxes in the same concentration of Sb 3+ ion in a microwale field. Ce 3+ can sensitize Sb 3+ , and enhance the fluorescent intensity of CaS:Sb 3+ efficiently.