摘要:Ln3Al5O12(LnAG, Ln=Y, Ce, Yb) lanthanide aluminium garnets nanopowders were prepared by co-precipitation method with Y2O3, Yb2O3, A1(NO3)3 o 9H2O and Ce(NO3)3 o 6H2O as raw materials, NH4HCO3 and NH3 o H2O as co-precipitator. The precursor and calcined powders were characterized with TG/DTA, XRD, SEM and TEM. The results show that well dispersive, regular shape Y3Al5Oi2, Yb3 Al5O12, Y29Ce0.1 A15 O12 garnets powders with an average particle size of about 50 nm were obtained by calcining the precursor at 1 000℃ for 3 h. However, Ce3Al50]2 does not formed under the same experimental conditions. The optimum calcining temperature to synthetize garnets powder is above 1 050 °C.%以Y2O3、Yb2O3、Al(NO3)3·9H2O和Ce(NO3)3·6H2O为原料,NH4HCO3、NH3·H2O做复合沉淀剂,用共沉淀法制备纳米稀土石榴石Ln3Al5O12( LnAG,Ln=Y,Ce,Yb)粉体.用TG/DTA、XRD、SEM、TEM等手段对LnAG前驱体及煅烧后的粉体进行表征.结果表明,用上述方法在1 000℃煅烧3h可得到分散性好、形状规则且粒径为50 nm左右的Y3 Al5O12、Yb3 Al5O12、Y2.9Ce0.1Al5O12石榴石粉体,但不能得到Ce3Al5O12石榴石,合成石榴石粉体的最佳煅烧温度为1050℃以上.