Method for mfg. lanthana nanopowder

Abstract

A process for preparing lanthanum oxide nanoparticles includes preparing water-in-oil microemulsion from the solution of surfactant, co-surfactant, non-polar organic solvent, dimethyl oxalate and lanthanum nitrate, heating, reaction, vacuum evaporation of solvent, washing precipitate with alcohol and water, drying and calcining.

Description

[0001] 1. Field [0002] The invention belongs to the field of chemical industry and relates to a method for preparing oxides, in particular to a chemical method for preparing nanometer lanthanum oxide powder. 2. Background technology [0003] In recent years, the specific properties of lanthanum oxide nanopowders in the fields of superconductivity, magnetism, catalysis, optics and functional devices have attracted great attention. The synthesis of nanopowders has become an important research field in chemistry and materials science, and the preparation of nanopowders with a certain particle size and narrow particle size distribution is particularly critical. A variety of nanopowder preparation methods have been reported at home and abroad, which can be divided into physical methods and chemical methods. The physical methods mainly include evaporation condensation method, mechanical alloy method and pulverization method. Chemical laws mainly include vapor deposition method, ...

AI Technical Summary

Problems solved by technology

Due to the large concentration gradient of the reactants in the common precipitation method, the particle size distribution of the rare earth oxide precursor is wide; the traditional uniform precipitation method cannot limit the extent of the precipitation reaction, and it is difficult to effectively control the particle size of the rare earth oxide precursor

Therefore, the above preparation process is difficult to control the particle size and particle size distribution of the final synthesized nanopowder