Process for preparing nano rareearth oxidate powder

A technology of oxide powder and nano-rare earth, which is applied in the direction of dyeing physical treatment, can solve the problems of ammonia emission, environmental pollution, and cannot meet the requirements of good dispersion and uniformity, and achieve the effect of uniform particle size and good dispersion

Inactive Publication Date: 2003-05-21
ANHUI LITE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many shortcomings in this method. First, the particle size of the prepared rare earth oxide powder is in a wide scale range from nanometer to submicron level, and the products with small particle size are mostly agglomerated, which cannot meet the

Method used

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  • Process for preparing nano rareearth oxidate powder
  • Process for preparing nano rareearth oxidate powder
  • Process for preparing nano rareearth oxidate powder

Examples

Experimental program
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Effect test

Embodiment 1

[0011] 1.5 liters of 0.45mol / L Na 2 CO 3 Gradually add 0.37mol / L YCl to the aqueous solution 3 In the aqueous solution, stir while adding, so that the pH value is 7; continuously stir for 10 minutes after the addition, and wash it with deionized water for 3 times after drying; add 20ml of absolute ethanol after drying, and stir evenly Then put it at 400°C for 1 hour, and after air cooling, nanometer Y with excellent dispersion and uniform particle size was obtained. 2 o 3 , with an average particle size of 10 nm, such as figure 1 shown.

Embodiment 2

[0013] At 0.3mol / L Dy(NO 3 ) 3 Gradually pour 0.4mol / L NaOH aqueous solution into the aqueous solution, and stir while pouring, so that the pH value is 6; after stirring for 13 minutes, spin dry to obtain the precipitate Dy(OH) 3 , washed with distilled water and then added 20 ml of isopropanol; stirred evenly and burned at 600 ° C for 1.5 hours, and air-cooled to obtain nano Dy with an average particle size of 20 nm 2 o 3 ,Such as figure 2 shown.

Embodiment 3

[0015] At 0.25mol / L Ce(NO 3 ) 3 Add 0.4mol / L Na to the aqueous solution 2 CO 3 Aqueous solution, burning temperature is 600 ℃, other conditions are the same as embodiment 1, and the average particle diameter is 20nm CeO 2 ,Such as image 3 shown.

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Abstract

The preparation method of nano rare earth oxide powder includes the following steps: mixing the nitric acid or hydrochloric acid aqueuos solution of raw material rare earth and precipitant carbonate,making ignition, specially, the rare earth nitrate is Ln(NO3)3 and rare earth hydrochloride is LnCl3, in which Ln=La, Nd, Sm, Gd, Eu, Y, Ce and Dy. and the mole number of its aqueous solution is 0.1-0.6 mol/L; then mixing the aqueous solution of the precipitant NaOH or carbonate Na2CO3 whose concentration is 0.3-0.6 mol/L with the above-mentioned Ln(NO3)3 or LnCl3 aqueous solution, their volume ratio of is 1.5-3:1 pH value is 6-7, stirring for above 10 min. and drying to obtain basic carbonate or carbonate or hydroxide, stirring dispersing agent alcohol material and the above-mentioned obtained material.

Description

1. Technical field [0001] The invention relates to a preparation method of nano rare earth oxide powder. 2. Background technology [0002] Nano-rare earth oxides and their products have many new properties. They can be used as high-efficiency catalysts in the petrochemical industry, new solid catalysts for organic silicon synthesis, new catalysts and photocatalysts in rubber and polymer synthesis, and can also be used as As a harmful gas degradation reactor, new rare earth nano-optical materials, etc., in superplastic nano-Y 2 o 3 Stabilized ZrO 2 Ceramics and other aspects have broad application value. Therefore, people have adopted a variety of preparation methods to obtain nano-rare earth oxide powder. Currently, the commonly used preparation methods mainly include hydrolysis method, hydrothermal method, and various forms of precipitation methods, etc., but none of them have good dispersion and particle size. Uniform nano-scale pure rare earth oxide powder, as disclos...

Claims

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Application Information

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IPC IPC(8): C09C3/04
Inventor 张晔张彤
Owner ANHUI LITE ENVIRONMENTAL PROTECTION TECH
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