Er^(3+):CaF_2纳米粉体的合成及光学性能  

Synthesis and Optical Properties of Er^(3+)-Doped CaF_2 Nanopowder

作　　者：李小女[1] 梅炳初[1] 宋京红[2] 李威威[1] 翟朋飞[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室 [2]武汉理工大学材料研究与测试中心,武汉430070

出　　处：《硅酸盐学报》2012年第9期1335-1339,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(51072144);武汉市工业科技攻关项目(201210321092)资助

摘　　要：采用直接沉淀法制备掺铒氟化钙(Er3+:CaF2)纳米粉体,通过X射线衍射仪、场发射扫描电子显微镜、透射电镜、分光光度计和电感耦合等离子发射光谱仪等分析手段研究了不同反应溶液浓度对Er3+:CaF2纳米粉体结构、形貌、粒径和Er3+真实掺入量的影响。结果表明:随着反应溶液浓度的增大,粉体颗粒尺寸逐渐减小,团聚程度加剧,Er3+的真实掺入量逐渐减少。反应溶液浓度为0.5mol/L时合成粉体分散性最好,颗粒平均尺寸约为32 nm,有利于制备性能优异的Er3+:CaF2透明陶瓷。在978 nm激光二极管激发下,该粉体实现了绿色(530～550 nm)和红色(650～660 nm)两种上转换发光,与之对应的Er3+辐射跃迁分别属于2H11/2、4S3/2→4I15/2和4F9/2→4I15/2,相对绿光而言红光发射强度较强。The erbium doped calcium fluoride nanopowder was prepared by a direct precipitation method. The powder prepared was characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and inductively coupled plasma emission spectroscopy, respectively. The influence of solution concentration on the morphology, particle size and doping amount of rare earth ions of Er^3＋：CaF2 nanopowder was investigated. The results show that the particles size and the doping amount of rare earth ions decrease with the increase of the solution concentration. The powder with the average particle size of 32 nm is dispersed at the concentration of solution of 0.5 mol/L, which favors the sinterability of Er^3＋：CaF2 ceramic. The upconversion lu- minescences of green emission （in the range of 530-550 nm） and red emission （in the range of 650-660 nm） were observed at the excitation of 978 nm due to the transition of 2H11/2, 4S3/2→4I15/2, 4F9/2→4I15/2, respectively. The intensity of green emission at 550 nm is weaker than that of the red emission at 660nm.

关 键 词：掺铒氟化钙 纳米粉体 光学性能 

分 类 号：O612[理学—无机化学]