纳米YAG粉体的制备与表征

Synthesis and Properties of nano-sized YAG Powder

以Y(NO3)3.6H2O、Al(NO3)3.9H2O、Nd(NO3)3.6H2O、NH4HCO3为原料,以乙醇为分散剂,采用共沉淀法制备Nd:YAG前躯体,将前躯体在不同温度下煅烧得到Nd:YAG粉体。分别采用红外光谱仪(FT-IR)、热重/差热分析仪(TG/DSC)、X射线衍射仪(XRD)、透射电子显微镜(TEM)对YAG前驱体及煅烧后YAG粉体进行表征。结果表明:前驱体经900℃煅烧2 h,可直接转变为纯相YAG粉体;在1100℃煅烧前躯体2 h,可获得无团聚,分散性良好,平均粒径约为40 nm的YAG粉体。

Precursor was synthesized via co-precipitation method with Y（NO3）3·6H2O、A1（NO3）3·9H2O、Nd（NO3）3·6H2O、NH4HCO3 and NHaHCO3 as raw material and alcohol as dispersant. The YAG powders were prepared after the precursor calcined at 900 ℃ - 1100 ℃ for 2h. The precursor was characterized by FT-IR. The XRD, TG/DSC and TEM were used to analyze the phase, transform temperature and microstructures of YAG powders. The results show that the precursor has directly transformed into YAG phase at 900℃ for 2h without other crys- talline phase. The YAG powders calcined at 1100℃ for 2h are well dispersed with an average of 40nm, and a litter agglomeration exists.