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Method for coating surface of wave-absorbing material with magnetic metal film

A technology of magnetic metal and surface coating, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve the problems of poor continuity, compactness and uniformity of magnetic metal film, and achieve the process of fine and The steps are easy to operate and the reaction process is stable.

Inactive Publication Date: 2019-12-06
中国人民解放军火箭军工程大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for coating the magnetic metal film on the surface of the wave-absorbing material to solve the problem that the continuity, compactness and uniformity of the magnetic metal film coated by the existing coating method are poor

Method used

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  • Method for coating surface of wave-absorbing material with magnetic metal film
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  • Method for coating surface of wave-absorbing material with magnetic metal film

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A method for coating a magnetic metal thin film on the surface of a wave-absorbing material. The coating process is completed through an activation solution, a reduction solution, a plating solution A and a plating solution B.

[0048] Among them, the preparation method of the activation solution is: at normal temperature, weigh 0.25g of palladium chloride, 14g of stannous chloride and 80g of sodium chloride, measure 25mL of concentrated hydrochloric acid and 500mL of deionized water, and then mix palladium chloride, chlorine Add stannous chloride and sodium chloride to concentrated hydrochloric acid and deionized water to dissolve.

[0049] The preparation method of the reducing solution: Dissolve 2-5 g of sodium borohydride in 100 mL of deionized water.

[0050] Prepare 50mL of plating solution A: use 50mL of deionized water to dissolve sodium hypophosphite.

[0051] Prepare 450mL of plating solution B: Dissolve cobalt chloride hexahydrate, sodium citrate, 4-methylbe...

Embodiment 2-4

[0070] For the specific differences between Embodiment 2-4 and Embodiment 1, see Table 1 below. Parts not shown in Table 1 are the same as Embodiment 1. For specific parameters of Embodiment 2-4, see Table 1 below.

[0071] Table 1

[0072]

[0073] in conclusion:

[0074] (1) For Example 1: carbonyl iron powder is one of the most commonly used wave-absorbing materials at present, and its major disadvantage is that it is easy to oxidize. The solution is to coat a layer of magnetic metal film on the surface of carbonyl iron powder to form a Composite absorbing material with core-shell structure. Moreover, since the particle size of the carbonyl iron powder is in the micron level, the specific surface area is large, and it is very easy to agglomerate, the reaction process of coating the magnetic metal cobalt film on the surface of the carbonyl iron powder is very violent, so the coating on the surface of the carbonyl iron powder is continuous, dense and Uniform magnetic met...

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Abstract

The invention belongs to the technical field of material modification, and particularly discloses a method for coating the surface of a wave-absorbing material with a magnetic metal film. The coatingprocess is completed through a plating solution A and a plating solution B, and surface of the wave-absorbing material is coated with the magnetic metal film in a chemical plating mode. The chemical plating comprises the following steps: 1, adjusting the pH value of the plating solution B to 10-12, and heating the plating solution B to 75-95 DEG C; 2, adding the material to be coated into the plating solution B with stirring the plating solution B, specifically, the stirring speed is 150-250 r / min; and 3, keeping stirring the plating solution B, then dropwise adding the plating solution A intothe plating solution B, and after the dropwise addition is finished, carrying out suction filtration to obtain modified wet powder, specifically, the dropping speed of the plating solution A is 20-45d / min. According to the method, the surface of the wave-absorbing material can be coated with the magnetic metal film with good continuity, compactness and uniformity.

Description

technical field [0001] The application of the invention belongs to the technical field of material modification, and specifically discloses a method for coating a magnetic metal thin film on the surface of a wave-absorbing material. Background technique [0002] With the development of modern science and technology, electromagnetic wave pollution is becoming more and more serious. For example, at airports, airplane flights will not be able to take off due to electromagnetic wave interference; Functional materials that absorb incident electromagnetic waves and reduce the reflection of electromagnetic waves (ie, absorbing materials) have attracted extensive attention from researchers. [0003] At present, the wave-absorbing material is developing in the direction of modification. The so-called modification is to combine one or more materials with the wave-absorbing material to make up for the defects of the wave-absorbing material, or to make the wave-absorbing material play a...

Claims

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Application Information

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IPC IPC(8): C23C18/36C23C18/34
CPCC23C18/1639C23C18/166C23C18/1879C23C18/34C23C18/36
Inventor 李茸李广德胡宇贾瑛刘渊
Owner 中国人民解放军火箭军工程大学
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