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Method for preparing nickel-coated powder by carbonyl vapor deposition

A technology of vapor deposition and nickel coating, applied in the field of nickel coating powder, can solve the problems of incomplete powder coating, low decomposition rate of nickel carbonyl, unstable product quality, etc., and achieve uniform particles, good dispersion and large surface area. Effect

Active Publication Date: 2022-05-17
成都核八五七新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When we use the carbonyl vapor deposition method to produce nickel-coated powder, the main problems are low decomposition rate of nickel carbonyl, incomplete powder coating, residual nickel carbonyl liquid in the powder, and undecomposed nickel carbonyl gas in the tail gas. , unstable product quality, etc.

Method used

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  • Method for preparing nickel-coated powder by carbonyl vapor deposition
  • Method for preparing nickel-coated powder by carbonyl vapor deposition
  • Method for preparing nickel-coated powder by carbonyl vapor deposition

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Effect test

Embodiment 1

[0029] A method for preparing nickel-coated powder by carbonyl vapor deposition, the method being applied to a nickel coating process, comprising the following steps:

[0030] 1) In the preparation stage, the coated material is placed in a vibrating pyrolysis coating furnace, the coated material is the coated material, and the coated material can be metal or non-metallic material, carbon monoxide and metal nickel are placed in the normal pressure And under the condition of 40 ℃, the obtained nickel carbonyl liquid is stored in the liquid storage tank for subsequent use;

[0031] 2) Put the nickel carbonyl liquid prepared in step (1) into the evaporator, and heat it to 150° C. through the heating device, the nickel carbonyl liquid is vaporized into nickel carbonyl gas, and at the same time, put the carrier gas into the evaporator;

[0032] 3) The carrier gas and nickel carbonyl gas enter the vibration pyrolysis coating furnace from the evaporator. The temperature of the nickel ...

Embodiment 2

[0036] A method for preparing nickel-coated powder by carbonyl vapor deposition, the method being applied to a nickel coating process, comprising the following steps:

[0037] 1) In the preparation stage, the coated material is placed in a vibrating pyrolysis coating furnace, the coated material is the coated material, and the coated material can be metal or non-metallic material, carbon monoxide and metal nickel are placed in the normal pressure And under the condition of 100 ℃, the obtained nickel carbonyl liquid is stored in the liquid storage tank for subsequent use;

[0038] 2) Put the nickel carbonyl liquid prepared in step (1) into the evaporator, and heat it to 300° C. through the heating device, the nickel carbonyl liquid is vaporized into nickel carbonyl gas, and at the same time, put the carrier gas into the evaporator;

[0039] 3) The carrier gas and nickel carbonyl gas enter the vibration pyrolysis coating furnace from the evaporator. The temperature of the nickel...

Embodiment 3

[0043] A method for preparing nickel-coated powder by carbonyl vapor deposition, the method being applied to a nickel coating process, comprising the following steps:

[0044] 1) In the preparation stage, the coated material is placed in a vibrating pyrolysis coating furnace, the coated material is the coated material, and the coated material can be metal or non-metallic material, carbon monoxide and metal nickel are placed in the normal pressure And under the condition of 70 ℃, the obtained nickel carbonyl liquid is stored in the liquid storage tank for subsequent use;

[0045] 2) Put the nickel carbonyl liquid prepared in step (1) into the evaporator, heat it to 225° C. through the heating device, the nickel carbonyl liquid is vaporized into nickel carbonyl gas, and simultaneously put the carrier gas into the evaporator;

[0046] 3) The carrier gas and nickel carbonyl gas enter the vibration pyrolysis coating furnace from the evaporator. The temperature of the nickel carbony...

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Abstract

The invention relates to a method for preparing nickel-coated powder by carbonyl vapor deposition. First, under normal pressure and 40-100°C, carbon monoxide reacts with active metal nickel to generate a carbonyl nickel liquid; then the carbonyl nickel liquid is heated to 150-100°C. At 300°C, the nickel carbonyl liquid is vaporized into nickel carbonyl gas; finally, the nickel carbonyl gas is mixed with the carrier gas, loaded into the vibrating pyrolysis coating furnace, and reacts with the coated material in the vibration pyrolysis coating furnace, and the nickel carbonyl The gas thermally decomposes and deposits metallic nickel on the surface of the coated material to obtain nickel-coated powder; the nickel coating method in the present invention has high selectivity, and the powder produced by this method has large surface area, high purity, uniform particles, and dispersed Good resistance, high chemical reactivity and activity, and has excellent compressibility and sinterability.

Description

technical field [0001] The invention relates to the technical field of nickel-coated powder, and relates to a method for preparing nickel-coated powder by carbonyl vapor deposition. Background technique [0002] The carbonyl method is a refining method that utilizes the principle of chemical migration reaction. Nickel-coated powder prepared by carbonyl vapor deposition method is an ideal method with high raw material utilization rate and good coating effect, but due to CO and the generated Ni(CO) 4 are highly toxic substances and Ni(CO) 4 The volatility is high, so it needs to react in a sealed system, requiring extremely strict anti-virus measures, and has high requirements for production equipment and technology. At the same time, the coated powder must be dense, uniform, complete, and chemically stable. . [0003] At present, the main methods of producing nickel-coated powder in the market are precipitation-reduction method, electroless nickel plating method, nickel sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/17B22F1/18B22F9/30
CPCB22F9/305B22F1/17Y02E60/10
Inventor 不公告发明人
Owner 成都核八五七新材料有限公司
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