草酸共沉淀法制备Yb^(3+)∶Y_(1.88)La_(0.12)O_3纳米粉体及光谱性能

Oxalate Co-Precipitation Synthesis of Yb^(3+)∶Y_(1.88)La_(0.12)O_3 Nanopowders and Its Spectroscopic Characteristics

以草酸为沉淀剂,聚乙二醇(PEG1000)为表面活性剂,采用超声辐射沉淀法制备了Yb3+、La3+共掺的Y2O3纳米粉体,采用TG/DTA、XRD、FTIR、TEM以及EDS等测试方法对粉体性能进行了表征,并对其室温下的吸收光谱及发射光谱进行了测试。结果表明:在1000℃煅烧4h所得粉体粒度均匀,粒径在40～60nm之间,具有较好的分散性。荧光发射的最强峰位于1032.1nm,吸收的最强峰位于977nm,均对应于Yb3+的基态2F7/2和激发态2F5/2之间的跃迁。

Yb3＋, La3＋ co-doped yttria nanopowder Yb^3＋：Y1.88La0.12O3 was synthesized by oxalate co-precipitation method under ultrasonic radiation, Yb^3＋：Y1.88La0.12O3 nanopowders calcined at different temperatures were characterized by TG/DTA, XRD, FTIR, TEM and EDS techniques, the absorption and emission spectra of the sample were also studied. The results indicate that nanopowder calcined at 1 000℃ for 4 h were 40-60 nm in size and well dispersed. The strongest emission peak and the strongest absorption peak centered at 1 032.1 nm and 977 nm respectively, all corresponding to the transition between energy level of 2F7/2 and 2F5/2 of Yb3＋ ion.