Nickel package aluminum powder and preparing method thereof

A technology of nickel-coated aluminum and aluminum powder, which is applied in the field of preparation of nickel-coated aluminum powder surface, which can solve the problems of strong toxicity and corrosion, small experimental batch of nickel-coated aluminum powder, increased energy consumption, etc., to reduce energy input , Reduce preparation cost, reduce the effect of water usage

Inactive Publication Date: 2013-12-11
BEIJING UNIV OF TECH
View PDF10 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] (2) The chemical reduction method in the existing patent requires multi-step pretreatment of the aluminum powder, such as alkali washing and pre-plating, and secondary or multiple nickel plating, which is a complicated process
[0014] (3) In the existing research, the temperature required for the plating solution environment is mostly in the range of 80-90°C, which not only increases energy consumption, but also raises the requirements for the control of the plating process and is relatively high
[0015] (4) Hydrazine (hydrazine hydrate) is the reducing agent in the chemical reduction method, which is highly toxic and corrosive. It not only requires high sealing and corrosion resistance of the equipment, but also causes great pollution to the environment.
[

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nickel package aluminum powder and preparing method thereof
  • Nickel package aluminum powder and preparing method thereof
  • Nickel package aluminum powder and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The nickel content of the design formula is 30%, and 10g of spherical aluminum powder with an average particle size of 40μm is selected. Prepare nickel-coated aluminum powder according to the following formula and steps:

[0056] a. Put the aluminum powder into a NaOH solution with a volume of 100mL and a concentration of 0.03mol / L, stir for 0.5-1min until the solution produces bubbles, quickly dilute the solution to 500mL, and then wash it with water three times. After the last wash, soak the aluminum powder in water .

[0057] b. Replacement method: Weigh 11.2g of nickel sulfate and 2g of citric acid, dissolve them in 500mL of water, add the aluminum powder in step a to the main salt solution and stir, weigh 0.08g of sodium dodecylbenzenesulfonate to dissolve In 20mL of water; weigh 3.7g of NH 4 Dissolve F in 30mL water; after the plating solution is mixed evenly, add the prepared NH at a constant speed within 1min. 4 F solution.

[0058] c. Chemical reduction me...

Embodiment 2

[0061] The nickel content of the design formula is 30%, and 100g of spherical aluminum powder with an average particle size of 10μm is selected. Prepare nickel-coated aluminum powder according to the following formula and steps:

[0062]a. Put the aluminum powder into a NaOH solution with a volume of 500mL and a concentration of 0.04mol / L, stir for 0.5-1min until the solution produces bubbles, quickly dilute the solution to 3000mL, and then wash it with water three times. After the last wash, soak the aluminum powder in water .

[0063] b. Replacement method: Weigh 112g of nickel sulfate and 11.2g of citric acid, dissolve them in 2000mL of water, add the aluminum powder in step a to the main salt solution and stir, then weigh 0.5g of sodium dodecylbenzenesulfonate Dissolve in 60mL water; weigh 37g of NH 4 Dissolve F in 370mL water; after the plating solution is evenly mixed, add the prepared NH at a constant speed within 1min. 4 F solution.

[0064] c. Chemical reduction m...

Embodiment 3

[0067] The nickel content of the design formula is 43%, and 100g of spherical aluminum powder with an average particle size of 30μm is selected. Its process of preparing nickel clad aluminum powder is different from embodiment 2 in that: NH in the b step 4 F solution consists of 37gNH 4 F is prepared by dissolving in 250mL water; the 1100mL second main salt solution in step c contains 227g nickel sulfate and 252g sodium citrate; 220g sodium hypophosphite is prepared into 800mL solution.

[0068] Finally, 171g of nickel-coated aluminum powder was obtained, the nickel content was estimated to be 41.5%, and the coating was uniform and complete.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses nickel package aluminum powder and a preparing method of the nickel package aluminum powder. According to the nickel package aluminum powder, aluminum powder is coated with a nanometer nickel plating layer and a nickel-phosphorus alloy plating layer is externally connected with the nanometer nickel plating layer, wherein the aluminum powder is spherical aluminum powder with the granularity of 10 micrometers-100 micrometers or sheet-shaped aluminum powder with the path length of 10 micrometers-100 micrometers and the path thickness of 1 micrometer-5 micrometers. The preparing method is a continuous reaction method combining a substitution method and a chemical reduction method and comprises the steps that a, the aluminum powder is washed through an NaOH solution; b, nanometer nickel is plated through the substitution method, namely, a first main saline solution is taken and mixed with surface active agent in advance, the aluminum powder is added, and finally an NH4F solution is dropwise added; c, nickel-phosphorus alloy is plated through the chemical reduction method, namely, after the NH4F solution is dropwise added for 3 to 5min, a second main saline solution, surface active agent and a sodium hypophosphite solution are added to a plating solution in sequence, the pH value is adjusted through addition of ammonium hydroxide, and an ammonium sulfate solution is finally added; d, the powder is washed by water and absolute ethyl alcohol for three times in an alternate mode and is dried in a vacuum mode. According to the nickel package aluminum powder and the preparing method, the technology is simple and coating is complete.

Description

technical field [0001] The invention belongs to the technical field of powder surface treatment and relates to a preparation method for coating nickel on the surface of aluminum powder. The prepared nickel-clad aluminum powder has complete coating, uniform plating layer and good bonding force, and the nickel-clad aluminum powder has good electrical conductivity, magnetic permeability and oxidation resistance. Background technique [0002] Aluminum powder is light in weight and low in price, and is widely used in metallurgy, chemical industry, decoration, construction, pesticide, pyrotechnics, chemical catalyst, explosives and other industries. Flaky aluminum powder is mainly used in pigment coatings due to its good metallic luster and shielding effect; ultrafine aluminum powder is used as an energy additive for gunpowder and propellants because of its extremely high combustion enthalpy. [0003] However, the chemical properties of aluminum itself are active, and it is easil...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22F1/02C23C18/32C23C18/36
Inventor 夏志东李哲王晓雅周虎李婷婷
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap