Ce^(3+)∶BaF_2多晶透明陶瓷的热压烧结法制备  

Preparation of Ce^(3+)∶BaF_2 Transparent Ceramic by Hot-pressed Method

作　　者：翟朋飞[1] 梅炳初[1] 宋京红[2] 李威威[1] 李小女[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,湖北武汉430070 [2]武汉理工大学材料研究与测试中心,湖北武汉430070

出　　处：《发光学报》2012年第7期698-706,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金重点项目(51072144);武汉市工业科技攻关项目(201210321092);2012年武汉理工大学在校研究生自主创新自由探索项目(2012-ZY-011)资助

摘　　要：采用沉淀法制备了Ce3+∶BaF2纳米粉体,研究了反应顺序和F-浓度对沉淀法制备Ce3+∶BaF2粉体的影响,采用XRD、SEM、TEM、ICP等手段对粉体进行了分析。结果表明:采用阴离子滴入阳离子的反应顺序,在较高F-浓度下制备的粉体保持了单一物相,粉体中稀土离子含量接近于初始掺入量。采用热压法于900℃温度同时在模具上施加30 MPa压力的条件下制备了Ce3+∶BaF2多晶透明陶瓷,陶瓷断面SEM结果显示,晶粒内存在闭气孔,陶瓷表面腐蚀后晶界完整清晰。X射线发光谱测试结果显示,Ce3+的掺杂摩尔分数为0.1%时,陶瓷样品的发光强度最大,此时Ce3+的掺杂量小于单晶中发光最强时的掺杂量。Ce^3＋∶BaF2 nanoparticles prepared via co-precipitation have been investigated for reaction sequence and concentration of reactants.Nano-particles were characterized by means of X-ray diffraction,SEM,TEM,ICP respectively.The results indicate that the powder synthesized by the condition of reverse reaction（anionic drip into the cationic） and high F-concentration is single phase and the actual doping value is close to the theoretical value.The transparent ceramic was prepared by hot-pressed way at 900 ℃ and 30 MPa.It can be seen that some closed pores existed in the grains from the picture of cross section.After superficial corrosion,grain boundary could be clearly seen from the microscope images.The X-ray induced luminescence intensity reached a maximum when the doping mole fraction of Ce^3＋ was 0.1%,lower than the Ce^3＋ content in the crystal.

关 键 词：共沉淀法 透明陶瓷 发光性能 

分 类 号：O482.31[理学—固体物理]