Preparation method of aluminum powder surface-coated flake cobalt hydroxide composite material

A technology of surface coating and cobalt hydroxide, applied in cobalt oxide/cobalt hydroxide, transportation and packaging, metal processing equipment, etc., can solve the problems such as the preparation method of sheet cobalt hydroxide coated on the surface of aluminum powder which has not yet been seen, Achieve the effect of improving high temperature oxidation efficiency, simple production equipment and improving dispersibility

Active Publication Date: 2021-08-24
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aluminum powder surface-coated cobalt hydroxide composites have broad application prospects in the fields of propellants, thermites, and pyrotechnics. However, in the existing literature, there is no preparation method for aluminum powder surface-coated flake cobalt hydroxide. report

Method used

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  • Preparation method of aluminum powder surface-coated flake cobalt hydroxide composite material
  • Preparation method of aluminum powder surface-coated flake cobalt hydroxide composite material
  • Preparation method of aluminum powder surface-coated flake cobalt hydroxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: Prepare aluminum powder surface-coated flake cobalt hydroxide composite material according to the following steps

[0034] (1) Add aluminum powder with a particle size range of 50 nm into water for ultrasonic dispersion with a power of 360 W to obtain an aqueous suspension with a concentration of 3 g / L aluminum powder;

[0035] (2) Under normal temperature and pressure, prepare an aqueous cobalt nitrate solution with a concentration of 2 g / L;

[0036] (3) Mix the aqueous phase suspension of aluminum powder and cobalt nitrate aqueous solution at a volume ratio of 1:1, and raise the temperature of the mixture to a reaction temperature of 30°C under the stirring condition of 500 rpm;

[0037] (4) Add sodium fluoride 0.16 times the mass of aluminum powder to the above mixed solution;

[0038] (5) After reacting for 10 minutes, the product was centrifuged and washed, and dried at 30°C to obtain a flaky cobalt hydroxide composite material coated with aluminum p...

Embodiment 2

[0039] Embodiment 2: Prepare aluminum powder surface-coated flake cobalt hydroxide composite material according to the following steps

[0040] (1) Add aluminum powder with a particle size range of 1 μm into water for ultrasonic dispersion with a power of 360 W to obtain an aqueous suspension with a concentration of 6.5 g / L aluminum powder;

[0041] (2) Under normal temperature and pressure, prepare an aqueous cobalt nitrate solution with a concentration of 11 g / L;

[0042] (3) Mix the aqueous phase suspension of aluminum powder and cobalt nitrate aqueous solution at a volume ratio of 1:1, and raise the temperature of the mixture to a reaction temperature of 35°C under the stirring condition of 500 rpm;

[0043] (4) Add sodium fluoride 0.4 times the mass of aluminum powder to the above mixed solution;

[0044] (5) After reacting for 35 minutes, the product was centrifuged and washed, and dried at 30°C to obtain a flaky cobalt hydroxide composite material coated with aluminum ...

Embodiment 3

[0045] Embodiment 3: Prepare aluminum powder surface-coated flake cobalt hydroxide composite material according to the following steps

[0046] (1) Add aluminum powder with a particle size range of 5 μm into water for ultrasonic dispersion with a power of 360 W to obtain an aqueous suspension with a concentration of 10 g / L aluminum powder;

[0047] (2) Under normal temperature and pressure, prepare an aqueous cobalt nitrate solution with a concentration of 20 g / L;

[0048] (3) Mix the aqueous phase suspension of aluminum powder and cobalt nitrate aqueous solution at a volume ratio of 1:1, and raise the temperature of the mixture to a reaction temperature of 40°C under the stirring condition of 500 rpm;

[0049](4) Add sodium fluoride 0.64 times the mass of aluminum powder to the above mixed solution;

[0050] (5) After reacting for 60 minutes, the product was centrifuged and washed, and dried at 30°C to obtain a flaky cobalt hydroxide composite material coated with aluminum p...

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Abstract

The invention discloses a preparation method of a flaky cobalt hydroxide composite material coated on the surface of aluminum powder, which is to mix the aqueous phase suspension of aluminum powder and cobalt nitrate aqueous solution, then add a certain amount of sodium fluoride, and react for a period of time. After a period of time, the obtained product is centrifuged to obtain a flaky cobalt hydroxide composite material coated on the surface of aluminum powder. The invention has the advantages of simple process, convenient operation, low raw material price and low production cost, and is very suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a sheet-shaped cobalt hydroxide composite material coated on the surface of aluminum powder. Background technique [0002] Due to its high density, low oxygen consumption and high combustion heat, aluminum powder has a significant effect on improving specific impulse, so it is widely used as metal fuel in solid rocket propellants. Usually, the surface of the aluminum powder is covered by a layer of dense aluminum oxide film, and the ignition of the aluminum powder requires the rupture and evaporation of the oxide film on the surface, and the temperature is above 2000°C; in addition, the melting point of the aluminum powder is low (about 660 ℃), it is very easy to sinter and agglomerate during the combustion process, and it is easy to agglomerate. Therefore, reducing the sintering agglomeration during the heating process of aluminum powder, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/06C01G51/04B22F1/02
CPCC06B33/06C01G51/04C01P2004/03B22F1/16
Inventor 程志鹏蒋煜徐辰宵殷竞洲戴本林赵伟张莉莉刘倩陈鑫焱仲慧褚效中徐继明
Owner HUAIYIN TEACHERS COLLEGE
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