A kind of preparation method of nanometer rare earth oxide powder

A nano-rare earth and oxide technology, applied in the direction of rare earth metal oxides/hydroxides, lanthanide oxides/hydroxides, nanotechnology, etc., can solve the problems of uneven particle morphology and obtain nanoparticles, etc. Achieve low production cost, reduce surface tension, and improve the effect of agglomeration

Active Publication Date: 2020-08-21
XIAMEN INST OF RARE EARTH MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods mentioned in the above patents can only prepare nanopowder with a single shape in the same system, and nanoparticles with different shapes cannot be obtained by changing the conditions, and the particle shape is not uniform.

Method used

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  • A kind of preparation method of nanometer rare earth oxide powder
  • A kind of preparation method of nanometer rare earth oxide powder
  • A kind of preparation method of nanometer rare earth oxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1) Add 0.034g cocamidopropyl betaine to the neodymium chloride solution of 100mL0.5mol / L, prepare solution A, add 0.120g cocamidopropyl betaine in the ammonium bicarbonate solution of 350ml0.5mol / L Betaine, prepared to obtain solution B. Make the concentration of cocamidopropyl betaine in the solution be 0.001mol / L.

[0050] 2) Add solution A prepared in step 1) dropwise to solution B at a rate of 1 mL / min to obtain a rare earth precipitate. During the dropping process, the reaction system was stirred at a speed of 600rpm. After the dropping was completed, the stirring was continued for 1 hour, then aged for 4 hours, filtered, washed with deionized water for 2-5 times, and then washed with ethanol for 2-6 times to obtain Sediment filter cake. Put the above precipitate filter cake into a vacuum drying oven, and vacuum dry at 80° C. for 4 hours.

[0051] 3) Calcining the rare earth precipitate prepared in step 2) to obtain nano-neodymium oxide powder. The precipitate ...

Embodiment 2

[0054] 1) Add 0.34g cocamidopropyl betaine to the neodymium chloride solution of 100mL0.5mol / L, prepare solution A, add 1.2g cocamidopropyl betaine in the ammonium bicarbonate solution of 350ml0.5mol / L Betaine, prepared to obtain solution B. Make the concentration of cocamidopropyl betaine in the solution be 0.01mol / L.

[0055] 2) Add solution A prepared in step 1) dropwise to solution B at a rate of 1.5 mL / min to obtain a rare earth precipitate. During the dropping process, the reaction system was stirred at a speed of 700rpm. After the dropping was completed, the stirring was continued for 1 hour, then aged for 4 hours, filtered, washed with deionized water for 2-5 times, and then washed with ethanol for 2-6 times to obtain Sediment filter cake. Put the above precipitate filter cake into a vacuum drying oven, and vacuum dry at 100° C. for 4 hours.

[0056] 3) Calcining the rare earth precipitate prepared in step 2) to obtain nano-neodymium oxide powder. The precipitate w...

Embodiment 3

[0059] 1) Add 0.68g cocamidopropyl betaine to the neodymium chloride solution of 100mL0.5mol / L, prepare solution A, add 2.4g cocamidopropyl betaine in the ammonium bicarbonate solution of 350ml0.5mol / L Betaine, prepared to obtain solution B. Make the concentration of cocamidopropyl betaine in the solution be 0.02mol / L.

[0060] 2) Add solution A prepared in step 1) dropwise to solution B at a rate of 1 mL / min to obtain a rare earth precipitate. During the dropping process, the reaction system was stirred at a speed of 800rpm. After the dropping was completed, the stirring was continued for 2 hours, then aged for 3 hours, filtered, washed with deionized water for 2-5 times, and then washed with ethanol for 2-6 times to obtain Sediment filter cake. Put the above-mentioned precipitate filter cake into a vacuum drying oven, and vacuum-dry at 90° C. for 5 hours.

[0061] 3) Calcining the rare earth precipitate prepared in step 2) to obtain nano-neodymium oxide powder. The preci...

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Abstract

The invention relates to a preparation method of a nano rare earth oxide. The preparation method comprises the following steps: 1) mixing a rare earth salt and a precipitating agent respectively witha betaine type surfactant to obtain a solution A and a solution B; 2) mixing the solution A and the solution B to obtain a rare earth precipitate; 3) calcining the rare earth precipitate obtained in the step 2) to obtain the nano rare earth oxide. In the preparation method, the betaine type surfactant is added. Through addition of the betaine type surfactant, the surface tension of the solutions can be effectively reduced, the agglomeration phenomenon of nanoparticles can be improved, and micelles with different structures can be formed in the aqueous solutions by use of different concentrations of the surfactants, and can be used as templates, so that the morphology and the size of the nanopowder material can be controlled, and the nano rare earth oxide with uniform and controllable morphology can be obtained.

Description

technical field [0001] The invention belongs to the technical field of nano-rare earth powder, and in particular relates to a preparation method of nano-rare-earth oxide powder. Background technique [0002] Nanomaterials have a wide range of applications in electronics, optics, biology, and medicine due to their unique properties that are significantly different from individual materials. Due to its unique 4f electronic structure, rare earth elements have brought them excellent properties in light, electricity, and magnetism. They are considered to be a treasure house of new light sources, new magnetic sources, new energy sources, and new materials. Boost the "vitamins" of traditional products. Rare earth oxides are important raw materials for the preparation of new non-metallic rare earth materials. Nano rare earth oxides combine the dual characteristics of rare earth and nano, which can greatly improve the performance of materials. [0003] The methods for preparing nan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/206C01F17/218C01F17/224B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01F17/206C01P2004/03C01P2004/20C01P2004/32C01P2004/60C01P2004/64
Inventor 孙晓琦黄彬王艳良黄超
Owner XIAMEN INST OF RARE EARTH MATERIALS
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