摘要
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.
Wikth lanthamum mitrite as raw material,NH_4HCO_3 as precipitator and glycerol as dispertant ,la_2O_3 nanocrystalline was prepared,The composition heat decmiposition mechanism of lanthamum carbonate precursor,the formation process of La_2O_3 and the micrograph of the particles were investigated by TG-DTA,XRD,IR and SEM.The results show that pure hexagonla phase La_2O_3 nanocrystalline has been produced by the lanthanum carbonate calcinated at 700℃for 2h.The nanoparticles of La_2O_3 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.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2005年第3期359-361,共3页
Chemical Research and Application
基金
河北省教育厅博士基金资助项目(B2004205)。
关键词
纳米晶
氧化镧
沉淀法
分散剂
nanocrystalline
lanthanum oxide,precipitation method ,dispertant
