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

A light rare earth oxide and spherical technology, applied in the direction of rare earth metal oxides/hydroxides, rare earth metal compounds, chemical instruments and methods, etc., can solve the problem of inability to effectively maintain products, complex preparation process and equipment, and limited material performance Effects and other issues, to achieve the effect of low raw material and processing costs, reduced mixing time of ball milling, equipment technology and simple operation

Active Publication Date: 2017-09-22
CHONGQING UNIV OF ARTS & SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 produ...

Method used

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

Examples

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Embodiment 1

[0025] A method for preparing nano-spherical cerium group light rare earth oxides, comprising the following steps:

[0026] 1. Ingredients

[0027] According to the stoichiometric ratio of each element in the reaction equation, the corresponding sodium bicarbonate (NaHCO 3 )2mol, rare earth salt cerium nitrate (Ce(NO 3 ) 2 ·6H 2 (2) 1mol is used as reaction raw material; Then take by weighing the surfactant cetyltrimethylammonium bromide (CTAB) that accounts for 2% of reaction raw material gross mass;

[0028] 2. Planetary ball mill

[0029] NaHCO to be weighed 3 , Ce(NO 3 ) 2 ·6H 2 O, CTAB is mixed with an appropriate amount of absolute ethanol, and is packed into an agate jar together with agate balls, wherein the weight ratio of the reaction raw materials to the agate balls is 1:5, and then planetary ball milling is carried out, and the ball milling speed is 300 revolutions per minute, and ball milling After 5 hours, the obtained product was suction filtered and th...

Embodiment 2

[0047] A method for preparing nano-spherical cerium group light rare earth oxides, comprising the following steps:

[0048] 1. Ingredients

[0049] According to the stoichiometric ratio of each element in the reaction equation, take corresponding 3mol sodium bicarbonate (NaHCO 3 ), 2mol rare earth salt lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O) as reaction raw material; Then take by weighing the surfactant cetyltrimethylammonium bromide (CTAB) that accounts for 3.5% of reaction raw material gross mass;

[0050] 2. Planetary ball mill

[0051] NaHCO to be weighed 3 , La(NO 3 ) 3 ·6H 2 O, CTAB is mixed with an appropriate amount of absolute ethanol, and is packed into an agate jar together with agate balls, wherein the weight ratio of the reaction raw materials to the agate balls is 1:6, and then planetary ball milling is carried out at a ball milling speed of 400 revolutions per minute. After 7.5 hours, the obtained product was suction filtered and then washed 4 times wit...

Embodiment 3

[0055] A method for preparing nano-spherical cerium group light rare earth oxides, comprising the following steps:

[0056] 1. Ingredients

[0057] According to the stoichiometric ratio of each element in the reaction equation, the corresponding sodium bicarbonate (NaHCO 3 )3mol, rare earth salt samarium sulfate (Sm 2 (SO 4 ) 3 ) 2mol as reaction raw material; Then take by weighing the surfactant cetyltrimethylammonium bromide (CTAB) that accounts for 4.5% of reaction raw material gross mass;

[0058] 2. Planetary ball mill

[0059] NaHCO to be weighed 3 、Sm 2 (SO 4 ) 3 , CTAB is mixed with an appropriate amount of absolute ethanol, and put into an agate jar together with agate balls. The weight ratio of the reaction raw materials to the agate balls is 1:8, and then planetary ball milling is carried out. The ball milling speed is 480 revolutions per minute, and the ball milling time is After 9.5 hours, the obtained product was suction filtered and then washed 5 times ...

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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...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01F17/206C01P2002/72C01P2004/03C01P2004/32C01P2004/51C01P2004/64C01P2006/80
Inventor 邓莹张艳华陈慧敬小龙李力姜中涛刘兵
Owner CHONGQING UNIV OF ARTS & SCI
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