摘要
分别以柠檬酸和甘氨酸为燃烧剂,采用低温凝胶燃烧法合成了Er3+、Yb3+共掺Y2O3纳米晶粉体。通过TG-DSC、XRD、SEM等分析手段对两种燃烧剂所对应的反应过程及纳米晶粉体的物理性能进行了分析,结果表明甘氨酸法具有更高的反应效率、更好的粉体分散性及粒径均匀性。在980 nm激光二极管(LD)激发下,对甘氨酸法所得样品的上转换发光性能分析表明,绿光和红光发射谱带分别来自于Er3+的4S3/2/2H11/2→4I15/2和4F9/2→4I15/2跃迁。此外,对Er3+和Yb3+掺杂浓度、粉体煅烧温度对纳米晶样品上转换发光性能的影响进行了讨论。
Er3＋ and Yb3＋ co-doped yttria nanocrystalline powders were synthesized by low-temperature gel-combustion method using citric acid and glycine as fuels,respectively.The reaction process and physical properties of nanocrystalline powders synthesized were studied by TG-DSC,XRD and SEM techniques,and the results indicate that glycine method possesses higher reaction efficiency,better powder dispersibility,and a narrower particle size distribution compared with that of citric acid samples.The up-conversion property of the samples was investigated under the 980 nm light emitting diodes（LD） excitation,the green and red up-conversion emission can be attributed to the 4S3/2 / 2H11/2 → 4I15/2 and 4F9/2 → 4I15/2 transitions of Er3＋,respectively.Effects of Er3＋ and Yb3＋ ion doping concentrations,calcination temperatures of the powders on the up-conversion properties of the nanocrystalline samples are also discussed.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2011年第4期619-624,共6页
Chinese Journal of Inorganic Chemistry
基金
国家大学生创新性实验计划项目(No.2009A0626)
吉林省科技发展计划项目(No.20090348)资助
