梭型CaMoO_4:Eu^(3+)红色荧光粉的高压拉曼和荧光光谱研究  

High Pressure Raman and Luminescence Study of Shuttle-like CaMoO_4: Eu^(3+) Red Phosphor

作　　者：赵智[1] 余方以[1] 丁泽军[1] 左健[1] 

机构地区：[1]合肥微尺度物质科学国家实验室,中国科学技术大学,合肥230026

出　　处：《光散射学报》2012年第2期163-167,共5页The Journal of Light Scattering

基　　金：中国科学技术大学青年基金(KA2340000007)

摘　　要：本文利用溶剂热方法合成出四方相梭子状CaMoO4:Eu3+微晶,并利用金刚石对顶砧压机结合Raman光谱和荧光光谱技术研究了其在24.7GPa压力下的结构和发光性能变化。结果发现,在约4GPa时发生了从四方白钨矿结构到单斜褐钇铌矿结构的可逆相变。同时,随着压力的增加,CaMoO4:Eu3+微晶的发光峰发生缓慢红移,红光和橙光强度比的降低说明了Eu3+所处格位局域对称性的升高。In this paper, the tetragonal shuttle-like CaMoO4 ： Eu3＋ microcrystal is synthe- sized by the hydrothermal method. Raman and luminescence spectroscopic investigation were carried out to study the structure and luminscence properties up to 24.7 GPa using a diamond anvil cell. It is found that a reversible phase transformation from tetragonal scheelite to monoclinic fergusonite structure appears at about 4 GPa. Meanwhile, the e- mission peaks of CaMoO4 ：Eu3＋ microcrystal red shift slightly and reducing of the intensity ratio between red and orange light indicates the rising of the site symmetry occupied byEu3＋ .

关 键 词：高压 相变 CaMoO4:Eu3+ RAMAN 荧光 

分 类 号：O521.2[理学—高压高温物理]