摘要
在微波场作用下，首次快速合成了球形亚超细尺寸的 ＣａＳ： Ｍｎ２＋，Ｅｕ２＋深红色荧光 体，ＳＥＭ照片显示其粒径为２５０～４００ｎｍ，并可观察到纳米粒子的团聚现象，呈现零维纳米材 料的特性．实验结果证实，Ｍｎ２＋与Ｅｕ２＋离子间存在着能量传递过程，因而Ｍｎ２＋对Ｅｕ２＋ 的发光具有明显的敏化和增强作用．
CaS:Mn2+, Eu2+ phosphor materials were firstly synthesized in microwave field. The materials synthesized were characterized by XRD、SEM and the fluorescent spectroscopy. The experimental results of XRD and SEM show that the CaS:Mn2+, Eu2+ phosphors possess the crystalline structures with sphere, the mean grain sizes of phosphors are 250-400nm. The introduction of Mn2+ into CaS:Eu2+, makes the fluorescence of the CaS:Mn2+, Eu2+ phosphor efficiently enhanced since the energy transfer from Mn2+ into Eu2+ ions.This new synthesis method compared to the traditional high temperature solid reaction exhibits interesting features, such as rapid reactions without H2-H2S protective atmosphere, phosphors with high purity, submicro-scale crystallines, and higher efficient luminescence.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第5期791-796,共6页
Journal of Inorganic Materials
基金
广东省自然科学基金!(960078)
北京大学稀土材料化学及应用国家重点实验室基金
关键词
微波场
球形
亚超细
发光
硫化钙
掺锰
掺铕
microwave field
sphere
submicro-scale
fluorescence
energy transfer
