采用柠檬酸盐溶胶凝胶法制备出了La2(CexZr1-x)2O7纳米粉体,利用TG-DTA、XRD、SEM等方法对粉体进行了研究。结果表明:制备出的纳米粉晶粒在25 nm左右;粉体在600℃附近具有稳定的晶体结构;La2Zr2O7为烧绿石结构,La2(CexZr1-x)2O7的晶体结构为近似Ce4O7的萤石结构;随着柠檬酸含量的增大,得到蓬松絮状的粉体。 La2 (CexZr1-x) 2O7 nano-powders were prepared by citrate sol-gel method. The powders were studied by TG-DTA, XRD and SEM. The results show that the prepared nano-powder has a grain size of about 25 nm, the powder has a stable crystal structure at about 600 ° C., the La2Zr2O7 is a pyrochlore structure, and the crystal structure of La2 (CexZr1-x) 2 O7 is an approximately Ce4O7- Structure; With the citric acid content increased, fluffy flocculent powder was obtained.