铝酸盐绿色荧光粉制备工艺与发光性能关系的研究  

Luminescent Properties and Preparation of CeMgAl_(11)O_(19)∶Tb Green Phosphor

作　　者：康凯[1] 庄卫东[1] 何大伟[2] 邓朝勇[1] 黄小卫[1] 

机构地区：[1]北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司,北京100088 [2]北京交通大学光电子技术研究所,北京100044

出　　处：《中国稀土学报》2004年第2期206-209,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金资助项目(50204002;50272013)

摘　　要：采用高温固相法制备了CeMgAl11O19∶Tb(CMAT)荧光粉,系统研究了该荧光粉的制备工艺与发光性能的关系,并对不同结果进行了分析。研究表明,铝含量适当过量有利于荧光粉发光亮度的提高;在1400～1550℃的范围内,CMAT的发光亮度呈稳定的上升趋势,这表明在一定的范围内,温度越高越有利于材料的结晶;MgF2可以取代目前工业生产中普遍采用的传统助熔剂H3BO3,起到很好的激活晶格形成,促进晶粒生长的效果。The sample of CeMgAl_(11)O_(19)∶Tb (CMAT) was prepared by conventional solid-state reaction. To improve the irradiation intensity of the phosphor, the effect of preparation processing of CMAT was studied systematically. On this basis possible explanations of the behaviors were proposed. The results show that a maximum brightness is obtained under the condition that the content of Al^(3+) is 12 mol/mol. While Ce^(3+) and Tb^(3+) cations (Ce^(3+)∶Tb^(3+)=2∶1) are taken as a kind of luminescence center and the concentration of the center is 0.9 mol/mol, the phosphor emits the strongest fluorescence. If content of the center is equal or above 1.0 mol/mol, TbAlO_3 phase appears in the phosphors and TbAlO_3 is harmful for luminescence. In the range of 1400～1550 ℃, the ascending trend of brightness with the temperature shows that higher temperature is propitious to crystal growing and MgF_2 can take the place of conventional flux H_3BO_3 since MgF_2 can simulate crystal lattice forming and accelerate the grain growing.

关 键 词：冷阴极型荧光灯 铝酸盐 荧光粉CeMgAl11O19:Tb 稀土 

分 类 号：TQ422[化学工程]