A kind of preparation method of multi-principal alloy nanopowder

A multi-principal alloy and nano-powder technology, applied in the direction of nanotechnology, can solve the problems of low production efficiency, high cost, and inability to meet industrial production, and achieve high production efficiency, uniform distribution, and small particle size.

Active Publication Date: 2021-03-23
合肥净龙环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese Patent Application No. 201711126593.6 uses the plasma arc method to prepare a multi-principal alloy powder material containing ordered nano-deposits in the structure. This method can prepare high-entropy alloy nanomaterials with uniform particle size, but the production efficiency is low and the cost is low. High, can not meet the needs of industrial production, only suitable for the production of special powder materials
At present, there are no relevant reports on the preparation of high-entropy alloy powder materials by combustion synthesis

Method used

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  • A kind of preparation method of multi-principal alloy nanopowder
  • A kind of preparation method of multi-principal alloy nanopowder
  • A kind of preparation method of multi-principal alloy nanopowder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 29.01g of Co(NO 3 ) 2 .6H 2 O, 40.02g of Cr (NO 3 ) 3 .9H 2 O, 24.16g of Cu (NO 3 ) 2 .3H 2 O, 40.4g Fe (NO 3 ) 3 .9H 2 O and 29.08 g of Ni (NO 3 ) 2 .6H 2 O was dissolved in 100 mL of distilled aqueous solution containing 10 mL of ammonia water, and stirred to obtain a mixed solution containing metal salts; then 85.58 g of sucrose was weighed and added to the above mixed solution, and after stirring, the pH of the mixed solution was adjusted to 8 with ammonia water to obtain a transparent sol; then the above transparent sol was heated in an oil bath at 110°C to remove solvent water to obtain a loose, foamy gel, which was further heated at 110°C for 20 min to obtain a solid precursor; then the above solid precursor was The body was placed in a vacuum tube furnace at 400 °C for 30 minutes to undergo redox reaction, and then a reducing gas H was introduced. 2 Continue to react for 10min to obtain a face-centered cubic crystal structure (such as figure...

Embodiment 2

[0026] Weigh 29.01g of Co(NO 3 ) 2 .6H 2 O, 40.02g of Cr (NO 3 ) 3 .9H 2 O, 24.16g of Cu (NO 3 ) 2 .3H 2 O, 40.4g Fe (NO 3 ) 3 .9H 2 O, 29.08g of Ni (NO 3 ) 2 .6H 2 O and 9.10 g of Zn (NO 3 ) 2 .6H 2O was dissolved in 50 mL of distilled aqueous solution containing 5 mL of ammonia water, stirred evenly to obtain a mixed solution containing metal salts; then weighed 25.125 g of hexamethyltetramine and 52.60 g of ethylenediaminetetraacetic acid and added it to the above mixed solution, stirred evenly, and used Ammonia water adjusted the pH of the mixed solution to 7 to obtain a transparent sol; then the above transparent sol was heated in an oil bath at 150°C to remove the solvent water to obtain a loose, foamy gel, which was further heated at 150°C Heating for 50min to obtain a solid precursor; then the above-mentioned solid precursor is placed in a vacuum tube furnace at 500°C to undergo a redox reaction for 45min, and then a reducing gas H is introduced 2 Cont...

Embodiment 3

[0028] Weigh 21.83g of Co(NO 3 ) 2 .6H 2 O, 30.01g of Cr (NO 3 ) 3 .9H 2 O, 18.12g of Cu(NO 3 ) 2 .3H 2 O, 30.3g Fe (NO 3 ) 3 .9H 2 O, 21.81g of Ni (NO 3 ) 2 .6H 2 O and 12.74g AgNO 3 Dissolve in 50mL distilled water solution containing 5mL ammonia water, stir to obtain a mixed solution containing metal salt; then weigh 50.47g of hexamethyltetramine and add it to the above mixed solution, stir well and adjust the pH of the mixed solution with ammonia water to be 6, A transparent sol was obtained; then the above-mentioned transparent sol was heated in an oil bath at 200° C. to remove solvent water to obtain a loose, foamy gel, which was further heated at 200° C. for 40 min to obtain a solid precursor; then the The above-mentioned solid precursors were placed in a vacuum tube furnace at 600 ° C to undergo redox reaction for 60 minutes, and then the reducing gas H was introduced. 2 Continue to react for 20min to obtain AgCoCrCuFeNi hexa-alloy nano-powders with an a...

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Abstract

The invention discloses a preparing method of multi-principal-element alloy nano-powder, and belongs to the field of high-entropy alloy powder materials. A low-temperature combustion synthesis methodis adopted for the method, and the preparing method specifically comprises the steps of regarding nitrates of cobalt, chrome, copper, iron, nickel, zinc, manganese, silver, platinum, palladium or rhodium as metal sources, and regarding one or more of hexamethylene tetramine, edetic acid, saccharose and the like which have high carton content and oxide value as reducible organic fuel; regulating the features such as the particle size and shapes of the multi-principal-element alloy nano-powder by controlling the type and concentration of the metal salt raw materials and the type and addition amount of the fuel. According to the preparing method, liquid-phase ingredients are adopted, it is ensured that the raw materials are uniformly mixed on the molecular level, and the product reaches the stoichiometric ratio; meanwhile, equipment is simple, the operation is simple, the preparing process saves energy and protects the environment, and the production efficiency is high; moreover, the purity of the product powder is high, and the crystalline grain of the product is small and uniform in distribution.

Description

technical field [0001] The invention belongs to the field of high-entropy alloy powder materials, in particular to a method for synthesizing multi-principal alloy powders by low-temperature combustion. The prepared high-entropy alloy powder materials can be used in many fields such as catalysis, energy storage, and biomedicine. Background technique [0002] High Entropy Alloys (HEAs) break through the traditional design concept of alloys with one or two metal elements as the main components. % alloy. This design concept enables high-entropy alloys to have high strength, high hardness, high corrosion resistance, high heat resistance, special electrical and magnetic properties and other characteristics. Multi-principal alloy nanoparticles integrate different metal elements into a nanoparticle system, and their mysterious synergy makes alloy nanomaterials attract much attention in many fields such as catalysis, energy storage, and biomedicine. [0003] At present, there have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/20B82Y40/00
CPCB22F9/20B82Y40/00
Inventor 冒爱琴权峰冉雪芹李一步俞海云郑翠红
Owner 合肥净龙环保科技有限公司
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