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A kind of method for preparing nano metal oxide and nano metal powder

A nano-metal powder and nano-metal technology, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of reducing the nanometer level, unavoidable agglomeration and sintering, difficult salt particle size, etc., to solve the problem of agglomeration and sintering , easy large-scale production, and the effect of simple preparation method

Active Publication Date: 2019-11-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also difficult to reduce the size of salt particles to the nanometer level by ball milling and other methods.
[0005] In summary, it is difficult to avoid agglomeration and sintering of metal oxide nanoparticles during high-temperature calcination and decomposition during the preparation process, and the existing technology is difficult to solve this problem

Method used

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  • A kind of method for preparing nano metal oxide and nano metal powder
  • A kind of method for preparing nano metal oxide and nano metal powder

Examples

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Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Prepare 2 L of potassium sulfate solution with a concentration of 0.1 mol / L with deionized water, add polyacrylic acid with a salt mass of 5%, and dissolve it. Under the condition of stirring, drop the potassium sulfate solution containing polyacrylic acid into 50 liters of ethanol, wash the precipitate with ethanol for 1-2 times, and obtain nanometer potassium sulfate after drying. Weigh 20 grams of nano-potassium sulfate, disperse it in 200 ml of ethanol, add 0.5 grams of stearic acid, and keep stirring at 50° C. for 2 hours. After centrifuging the ethanol dispersion of nano-potassium sulfate, disperse nano-potassium sulfate in 200ml of xylene, add 10g of nickel carbonate, stir at 80°C for 2 hours, centrifuge, dry, calcinate at 1000°C for 2 hours, wash with water, and dry to obtain nano Nickel oxide.

Embodiment 2

[0044] Example 2: Prepare 2 L of potassium sulfate solution with a concentration of 0.1 mol / L with deionized water, add polyacrylic acid with a salt mass of 5%, and dissolve it. Under the condition of stirring, drop the potassium sulfate solution containing polyacrylic acid into 50 liters of ethanol, wash the precipitate with ethanol for 1-2 times, and obtain nanometer potassium sulfate after drying. Weigh 20 grams of nano-potassium sulfate, disperse it in 200 ml of ethanol, add 0.5 grams of stearic acid, and keep stirring at 30° C. for 2 hours. After centrifuging the ethanol dispersion of nano-potassium sulfate, disperse nano-potassium sulfate in 200ml of xylene, add 10g of nickel carbonate, stir at 80°C for 2 hours, centrifuge, dry, calcinate at 1000°C for 2 hours, wash with water, and dry to obtain nano Nickel oxide.

Embodiment 3

[0045] Example 3: Prepare 2 L of potassium sulfate solution with a concentration of 0.1 mol / L with deionized water, add polyacrylic acid with a salt mass of 5%, and dissolve it. Under the condition of stirring, drop the potassium sulfate solution containing polyacrylic acid into 50 liters of ethanol, wash the precipitate with ethanol for 1-2 times, and obtain nanometer potassium sulfate after drying. Weigh 20 grams of nano-potassium sulfate, disperse it in 200 ml of ethanol, add 0.5 grams of stearic acid, and keep stirring at 60° C. for 2 hours. After centrifuging the ethanol dispersion of nano-potassium sulfate, disperse nano-potassium sulfate in 200ml of xylene, add 10g of nickel carbonate, stir at 80°C for 2 hours, centrifuge, dry, calcinate at 1000°C for 2 hours, wash with water, and dry to obtain nano Nickel oxide.

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Abstract

The invention discloses a method for preparing nanometer metal oxides and nanometer metal powders. Nano potassium sulfate is used in xylene to disperse and isolate metal oxide precursor particles, and after centrifugal precipitation, the dried product is calcined and decomposed at high temperature , after washing with water, dispersed nano metal oxides can be obtained. The calcined product is calcined for the second time in a reducing atmosphere, and the dispersed nano metal powder can be obtained after washing with water. The invention can rapidly prepare nanometer metal oxides or nanometer metal powders with good dispersion and perfect crystallization in batches.

Description

technical field [0001] The invention relates to a technology for preparing nanometer metal oxide and nanometer metal powder, which belongs to the field of nanometer powder preparation. Background technique [0002] Nano-metal oxides have surface effect, quantum size effect, volume effect and macroscopic quantum tunneling effect, so they have unique thermal, optical, electrical, magnetic and chemical properties, and are widely used in electronics, chemical industry, machinery, biomedicine and other fields. [0003] However, nano-metal oxides are prone to agglomeration and sintering during the preparation process, making it difficult to prepare dispersed nanoparticles. At present, the liquid phase method is widely used in industry and laboratories to prepare nano-metal oxides. First, the precursors of nano-metal oxides, such as hydroxides, oxalates, carbonates, etc., are synthesized in the solution, and then the precursors are heated at high temperature. Calcination and decom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04B82Y40/00B82Y30/00B22F9/22B22F1/00
CPCB82Y30/00B82Y40/00C01G53/04B22F9/22C01P2004/64C01P2004/03B22F1/054
Inventor 董岩王宇婷卞仙邵起越蒋建清
Owner SOUTHEAST UNIV
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