SrAl_2O_4:Eu^(2+)发光材料微观及纳米结构探索  

Micro and Nanostructure Investigation of SrAl_2O_4:Eu^(2+) Luminescent Materials

作　　者：梁加淼[1] 

机构地区：[1]上海交通大学分析测试中心,上海200240

出　　处：《实验室研究与探索》2010年第3期44-46,共3页Research and Exploration In Laboratory

摘　　要：利用透射电子显微镜对气相生长法合成的SrAl2O4:Eu2+发光材料的显微结构进行表征。研究发现,在SrAl2O4:Eu2+发光材料的内部有畴结构的存在,该畴结构具有60°或120°旋转关系,是一种孪晶畴。这种孪晶畴的出现是SrAl2O4:Eu2+高温六角相到低温单斜相转变的结果,并且在对锥状SrAl2O4:Eu2+材料研究中还观察到了宽度约为10 nm的(100)生长孪晶。最后,在局部区域对样品进行系列倾转后发现,单斜结构的SrAl2O4:Eu2+晶体结构发生了一定的变化。Micro and nanostructure of SrAl2O4:Eu2 + luminescent materials prepared by vapor growth method were char-acterized by transmission electron microscope(TEM).The twin domains with 120 ℃ rotation were found,which were caused by the phase transformation from high temperature hexagonal to low temperature monoclinic.The(100) growth twins with about 10 nm width were also observed in cone-shaped SrAl2O4:Eu2 + materials.In the end,small structure transformation was revealed in some areas by tilting sample.

关 键 词：透射电子显微镜 孪晶畴 生长孪晶 相位转变 

分 类 号：TB34[一般工业技术—材料科学与工程]