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Prepn process of RE nano oxide

A nano-oxide and rare-earth oxide technology, which is applied in the field of preparation of rare-earth nano-oxides, can solve problems such as being unsuitable for the preparation of high-purity rare-earth oxide nano-powders, and achieve fine particle size, uniform particle size, and simple operation. Effect

Inactive Publication Date: 2003-05-14
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not suitable for the preparation of high-purity rare earth oxide nanopowders because the addition of carbon black is easy to introduce other impurities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: get 1mol / L Y 3+ 300ml of nitric acid solution, diluted with water to 1000ml, heated to 60°C, added 0.1% sodium dodecylbenzenesulfonate (DBS), stirred and mixed, weighed 118.5g of sodium bicarbonate, dissolved in 3000ml of water, the concentration of the solution was 0.5mol, add dropwise to Y at a speed of 40ml / min under constant stirring 3+ in the nitric acid solution until the addition is complete. Filter quickly, wash with water at 30°C until neutral, dry the precipitate at 100-110°C, raise the temperature to 800°C for 3 hours, and generate nano-Y 2 o 3 , the particle size is less than 40nm, and the specific surface area is 20-40m 2 / g.

Embodiment 2

[0009] Embodiment 2: get 1mol / L La 3+ 200ml of hydrochloric acid solution, diluted with water to 1000ml, heated to 30°C, added 0.1% sodium dodecylbenzenesulfonate (DBS), stirred and mixed, prepared ammonium bicarbonate aqueous solution, the solution concentration was 0.5mol, and was stirred continuously Add dropwise to La at a speed of 10ml / min 3+ hydrochloric acid solution until the addition is complete. Filter quickly, wash with water at 30°C until neutral, dry the precipitate at 100-110°C, raise the temperature to 900°C for 2 hours, and generate nano-La 2 o 3 , the particle size is less than 40nm, and the specific surface area is 20-40m 2 / g.

Embodiment 3

[0010] Embodiment 3: get 1mol / L Ce 3+ 100ml of nitric acid solution, diluted with water to 1000ml, heated to 40°C, added 0.1% fatty alcohol polyoxyethylene ether (AE), stirred and mixed, prepared ammonium bicarbonate aqueous solution, the solution concentration was 0.5mol, and mixed with 20ml / min speed drops to Ce 3+ in the nitric acid solution until the addition is complete. Filter quickly, wash with water at 30°C until neutral, dry the precipitate at 100-110°C, raise the temperature to 800°C for 2 hours, and generate nano-CeO 2 , the particle size is less than 40nm, and the specific surface area is 20-40m 2 / g.

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PUM

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Abstract

Nano RE oxide is prepared through the process of: selecting single RE oxide R2O3, where R is La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Sc, or their mixture as raw material; dissolving in water solution of nitric acid or hydrochloric acid to reach a RE ion density of 0.1-0.4 mol / L; heating to 30-80 deg.c; adding dispersant sodium dodecyl benzenesulfonate, polyoxyethylenated alcohol, SPAN-80 or Tween-80 and precipitant to form RE carbonate precipitate; filtering, drying, and heating to 700-900 deg.c to obtain single or mixed nano RE oxide. The nano RE oxide has grain size smaller than 40 nm and specific surface area of 20-40 sq m / g.

Description

technical field [0001] The invention relates to a preparation method of rare earth nano oxides. Background technique [0002] The nanometerization of materials will endow materials with many characteristics different from macroscopic substances, which has important application value and will cause a new technological revolution. There are many reports on the preparation methods of rare earth nano-oxides, such as hydrolysis method, alkoxide method, thermal decomposition method, explosion method, homogeneous precipitation method, complex precipitation method, and sol-gel method. Most of the methods are feasible for the preparation and characterization of rare earth nanoparticles, but the industrial production is not yet mature. The present invention will provide a preparation method of rare earth nano oxides that can be industrialized. [0003] Japanese patent JP-6464-4H (1985) and Wang Zenglin et al. used rare earth oxalate as the substrate, and decomposed the oxalate into r...

Claims

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Application Information

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IPC IPC(8): C01F17/00C04B35/50C04B35/624
Inventor 洪广言于德才郭宝金
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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