Wikth lanthamum mitrite as raw material,NH4HCO3 as precipitator and glycerol as dispertant ,la2O3 nanocrystalline was prepared,The composition heat decmiposition mechanism of lanthamum carbonate precursor,the formation process of La2O3 and the micrograph of the particles were investigated by TG-DTA,XRD,IR and SEM.The results show that pure hexagonla phase La2O3 nanocrystalline has been produced by the lanthanum carbonate calcinated at 700℃for 2h.The nanoparticles of La2O3 are sogerucal in shape and dispersing well.The grain size ia about 45 nm in diameter.The advantages of this method are raw materials are low-cost,the operation is easy,and it is easy to be used in industry.
