Preparation method of nano spherical cerium-group light rare earth oxide

Abstract

The invention relates to a preparation method of a nano spherical cerium-group light rare earth oxide. The preparation method comprises the following steps: (1) respectively weighing sodium hydrogen carbonate and rare earth salt serving as reaction raw materials, wherein the rare earth salt is lanthanum salt, cerium salt, praseodymium salt, neodymium salt, promethium salt, samarium salt or europium salt; then, weighing right amount of hexadecyl trimethyl ammonium bromide; (2) mixing the reaction raw materials with the hexadecyl trimethyl ammonium bromide and right amount of anhydrous ethanol, and then carrying out planetary ball milling; (3) carrying out extraction filtration on an obtained product, washing, and then adding right amount of the anhydrous ethanol so as to obtain precursor slurry; (4) carrying out thermal decomposition on the precursor slurry by using a spray pyrolysis method. The preparation method provided by the invention has the advantages of being low in raw material cost, simple in equipment technology and operation, easy in realization of industrialization, and the like, and can be used for preparing the nano solid spherical cerium-group light rare earth oxide which is good in morphology, uniform in distribution, small in particle size, high in purity and high in particle spheroidization rate.

Description

technical field [0001] The invention relates to the preparation of rare earth compounds, in particular to a preparation method of nano-spherical cerium group light rare earth oxides. Background technique [0002] The earth's rare earth resources are scarce, and my country's rare earth production ranks first in the world. The application research of rare earth plays an important role in our country. Due to their unique physical and chemical properties, rare earth oxides are widely used in traditional industries and high-tech fields, such as the preparation of metal matrix composite materials, polishing materials, luminescent materials, laser materials, fibers, and ceramic materials. Rare earth oxides can be used as doping components of materials, sintering aids, catalysis and magneto-optical storage, etc. Nanomaterials are currently a research hotspot in various countries in the world. Nanoscale rare earth oxides integrate rare earth characteristics and nanometer characteris...

AI Technical Summary

Problems solved by technology

However, most of these methods have defects such as complicated preparation process and equipment, difficult control, different shapes of powders prepared, and low spheroidization rate.

Although some methods claim to be able to prepare nano-spherical powder products, due to the lack of effective means for real-time control of the morphology of intermediate products and final products during the preparation process, they cannot effectively maintain the product at a high spheroidization rate. The nano-spherical shape of the obtained spherical powder cannot be guaranteed to be a solid nano-sphere, which makes the obtained product easy to grow, bonded and agglomerated, which greatly limits the performance effect of the material

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