中文摘要：

采用化学共沉淀法，以碳酸氢铵为沉淀剂，添加一定量的聚乙二醇400或OP乳化剂作为表面活性剂，制备了Yb：YAG透明陶瓷纳米粉体。利用扫描电镜、TG—DTA、红外光谱、X射线衍射对粉体的形貌、热稳定、以及物相结构进行了详细分析。研究发现，化学反应过程中添加一定量的表面活性剂能够获得均匀、细化的陶瓷粉体。对不同Yb掺杂浓度样品的荧光光谱亦进行了研究，结果发现，掺杂浓度的不同对粉体发光性能有明显影响，且掺杂量为5％时发光强度最大。

英文摘要：

Yb：YAG transparent ceramic nano-powders were prepared by chemical co-precipitation method, with ammonium bicarbonate as a precipitant and polyethylene glycol （PEG） 400 or polyoxyethylene octylphenyl ether （OP） as a surfactant. The morphology, thermal stability and phase structure of the prepared transparent ceramic nano-powders were characterized by scanning electron microscopy, TG-DTA, IR spectroscopy, and X-ray diffraction. The results show that adding a proper amount of the surfactant in the chemical reaction process can get fine uniform ceramic powders. The fluorescence spectra of samples doped with different concentrations of Yb also were investigated. The results indicate that the luminous property of the powders changes significantly with the doping concentration, and the luminous intensity reaches the maximum value when the doping concentration is 5%.