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Preparation method of nickel plated aluminum powder

A nickel-plated aluminum and aluminum powder technology, applied in the direction of liquid chemical plating, coating, metal material coating process, etc., can solve the problems of high cost of aluminum powder silver plating, difficult plating, unstable plating solution, etc. Achieve the effect of good nickel magnetic permeability, strong binding force, and prevention of re-formation

Active Publication Date: 2012-10-03
TIANNUO PHOTOELECTRIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, aluminum is an amphoteric metal, which is unstable under both acidic and alkaline conditions. Therefore, aluminum powder is easy to dissolve rapidly in the plating solution, and it is easy to cause the plating solution to be unstable. Compared with other powder materials, its plating is more difficult.
The cost of aluminum powder silver plating is high, and copper plating is easy to oxidize

Method used

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  • Preparation method of nickel plated aluminum powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a. Alkali washing: Put the spherical aluminum powder of aluminum particle 1 with a particle size of 200 mesh and a spherical shape into an ammonium hydroxide solution with a volume concentration of 1000mL / L, stir for 0.5min, and then wash it with water;

[0037] b. Pretreatment: first configure the pretreatment solution according to the ratio of sodium citrate:ammonia water=3g:300mL, then add the aluminum powder washed with alkali in step a into the pretreatment solution, and stir for 5s; or

[0038] Add the alkali-washed aluminum powder in step a to 15g / L sodium fluoride, and stir for 5s;

[0039] c. Pre-plating: first configure the pre-plating solution according to the ratio of sodium citrate: ammonia water: potassium sodium tartrate: potassium pyrophosphate = 3g: 300mL: 0.1g: 10g, then add the pre-treated aluminum powder in step b to the pre-plating solution, adjust the pH to 9 with sodium hydroxide or ammonia water, stir for 60 seconds and wash with water;

[0040]...

Embodiment 2

[0043] a. Alkali washing: Put the spherical aluminum powder with a particle size of 1500 mesh in aluminum particle 1 into an ammonium hydroxide solution with a volume concentration of 50 mL / L, stir for 5 minutes, and then wash it with water;

[0044] b. Pretreatment: first configure the pretreatment solution according to the ratio of sodium citrate:ammonia water=20g:100mL, then add the aluminum powder washed with alkali in step a into the pretreatment solution, and stir for 60s; or

[0045] Add the alkali-washed aluminum powder in step a to 0.5g / L sodium fluoride, and stir for 60s;

[0046] c. Pre-plating: first configure the pre-plating solution according to the ratio of sodium citrate: ammonia water: potassium sodium tartrate: potassium pyrophosphate = 20g: 100mL: 5g: 0.2g, then add the pre-treated aluminum powder in step b to the pre-plating solution, adjust the pH to 13 with sodium hydroxide or ammonia water, stir for 5 seconds, and wash with water;

[0047] d. electroles...

Embodiment 3

[0050] a. Alkali washing: Put the spherical aluminum powder with a particle size of 1000 meshes into the ammonium hydroxide solution with a volume concentration of 500mL / L, stir for 3 minutes, and then wash it with water;

[0051]b. Pretreatment: first configure the pretreatment solution according to the ratio of sodium citrate:ammonia water=12g:200mL, then add the aluminum powder washed by alkali in step a into the pretreatment solution, and stir for 30s; or

[0052] Add the alkali-washed aluminum powder in step a to 10g / L sodium fluoride, and stir for 30s;

[0053] c. Pre-plating: first configure the pre-plating solution according to the ratio of sodium citrate: ammonia water: potassium sodium tartrate: potassium pyrophosphate = 10g: 200mL: 3g: 5g, and then add the pretreated aluminum powder in step b to the pre-plating solution , adjust the pH to 11 with sodium hydroxide or ammonia water, stir for 30 seconds and wash with water;

[0054] d. electroless plating: the c step ...

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Abstract

The invention provides nickel plated aluminum powder and a preparation method and application thereof. The aluminum powder consists of aluminum granules, a nickel metal plating layer is connected outside the aluminum granules, and an organic material protective layer is connected outside the nickel metal plating layer. The preparation method comprises the following steps of: a, putting the aluminum powder into ammonium hydroxide solution to perform alkali washing; b, mixing first complexing agent solution and ammonium hydroxide solution uniformly, and adding the aluminum powder subjected to the alkali washing in the step a into the mixed solution, or adding the aluminum powder subjected to the alkali washing in the step a into a fluoride to perform pretreatment; c, pre-plating: mixing thefirst complexing agent solution and the ammonium hydroxide solution uniformly, adding a second complexing agent and a third complexing agent into the mixed solution, mixing the solution uniformly, and then adding the aluminum powder pretreated in the step b into the mixed solution to perform pre-plating; d, soaking the aluminum powder pre-plated in the step c into chemical nickel plating solutionto perform one-time or two-time nickel plating, washing the aluminum powder by water, and drying the washed aluminum powder to obtain the nickel plated aluminum powder; and e, soaking the nickel plated aluminum powder of the step d into organic acid ester mixed solution, and filtering and drying the nickel plated aluminum powder to obtain a product.

Description

Technical field: [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a nickel-plated aluminum powder; a preparation method of the nickel-plated aluminum powder; and an application of the nickel-plated aluminum powder. Background technique: [0002] Due to the advantages of light weight, low cost and light color, aluminum powder is widely used in various coating products. In order to further expand the application field of aluminum powder, a layer of metal copper, nickel, silver, etc. can be plated on its surface by electroless plating to make it conductive, so that it can be added to coatings, adhesives, inks, plastics, etc. , rubber made of conductive, electromagnetic shielding, anti-static and other products, widely used in electronics, electromechanical, communications, printing, aerospace and other fields of conductive, electromagnetic shielding, anti-static fields. [0003] So far, there are few reports on the research...

Claims

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Application Information

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IPC IPC(8): B22F1/02C23C18/36C23C18/18
Inventor 余凤斌朱焰焰王义海郭涵曹建国
Owner TIANNUO PHOTOELECTRIC MATERIAL
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