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Method for preparing carbon covered nickel nano grain enhanced silver based composite material

A nano-particle, carbon-coated nickel technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, can solve problems such as uneven dispersion of reinforcement phase, achieve a simple and convenient preparation method, and is conducive to comprehensive performance , the effect of good electrical performance

Inactive Publication Date: 2010-03-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing a carbon-coated nickel nanoparticle-reinforced silver-based composite material. This method not only has a simple process, low cost, and avoids the introduction of foreign pollutants in each link of the preparation process, Moreover, the disadvantage of uneven dispersion of the reinforcing phase is overcome, and the carbon-coated nickel nanoparticle-reinforced silver-based composite material prepared by this method has good electrical properties, comprehensive mechanical properties and wear resistance

Method used

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  • Method for preparing carbon covered nickel nano grain enhanced silver based composite material
  • Method for preparing carbon covered nickel nano grain enhanced silver based composite material
  • Method for preparing carbon covered nickel nano grain enhanced silver based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The first step, preparation of Ni+Ag catalyst precursor NiO+Ag by deposition-precipitation method 2 o

[0031] Add nickel nitrate hexahydrate and silver nitrate into deionized water at a mass ratio of 0.03:1 to prepare an aqueous solution with a molar concentration of nickel nitrate of 0.01mol / L and simultaneously contain nickel ions and silver ions, and add dropwise to the solution Molar concentration is 1.25mol / L sodium hydroxide solution to pH value is 10, and is precipitated, makes the Ni(OH) of mass ratio Ni:Ag=0.01:1 2 +Ag 2 O binary colloid, the Ni(OH) 2 +Ag 2 The O binary colloid was put into an electric constant temperature drying oven, dehydrated to complete dryness at 250 °C and nitrogen atmosphere, and then placed in a tube furnace for calcination at 300 °C for 3 hours to obtain the Ni+Ag catalyst precursor NiO+Ag 2 O powder;

[0032] The second step is to prepare carbon-coated nickel nanoparticles + silver in-situ composite powder by chemical vapor dep...

Embodiment 2

[0037] The first step, preparation of Ni+Ag catalyst precursor NiO+Ag by deposition-precipitation method 2 o

[0038] With embodiment 1;

[0039] The second step is to prepare carbon-coated nickel nanoparticles + silver in-situ composite powder by chemical vapor deposition

[0040] Except that the catalytic cracking reaction time is 2h, the carbon-coated nickel nanoparticles + silver in-situ composite powder with an average particle size of 28nm is obtained, and the yield of carbon-coated nickel nanoparticles is 0.31%, other processes, conditions and results Same as embodiment 1;

[0041] The third step is to prepare carbon-coated nickel nanoparticles reinforced silver-based composites

[0042] With embodiment 1.

[0043] The high-resolution scanning electron micrograph of the carbon-coated nickel nanoparticles + silver in-situ composite powder obtained in this example is shown in figure 1 , where the high-resolution transmission electron micrographs of carbon-coated nick...

Embodiment 3

[0046] The first step, preparation of Ni+Ag catalyst precursor NiO+Ag by deposition-precipitation method 2 o

[0047] Add nickel nitrate hexahydrate and silver nitrate into deionized water at a mass ratio of 0.17:1 to prepare an aqueous solution containing nickel ions and silver ions with a molar concentration of nickel nitrate of 0.04 mol / L, and add dropwise to the solution Molar concentration is 1.25mol / L sodium hydroxide solution to pH value is 10, and is precipitated, makes the Ni(OH) of mass ratio Ni:Ag=0.05:1 2 +Ag 2 O binary colloid, the Ni(OH) 2 +Ag 2 The O binary colloid was put into an electric constant temperature drying oven, dehydrated to complete dryness at 150 °C and nitrogen atmosphere, and then placed in a tube furnace for calcination at 400 °C for 2 hours to obtain the Ni+Ag catalyst precursor NiO+Ag 2 O powder;

[0048] The second step is to prepare carbon-coated nickel nanoparticles + silver in-situ composite powder by chemical vapor deposition

[004...

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Abstract

The invention discloses a method for preparing carbon-coated nickel nano-particle enhanced silver-base composite material and relates to manufacturing of silver-base alloy. The method comprises the following steps: step one, the precursor NiO plus Ag2O of Ni plus Ag catalyst is prepared by a deposition-precipitation method; step two, carbon-coated nickel nano-particles plus silver in-situ composite powder are prepared by a chemical vapor deposition method; and step three, the carbon-coated nickel nano-particle enhanced silver based composite material is prepared. The method not only has simpletechnical process and low cost, avoids introducing foreign pollutant in every process of preparation technology but also overcomes the defects of non-uniform dispersion of the reinforced phase. The carbon-coated nickel nano-particle enhanced silver-base composite material prepared by the method has good electric property, comprehensive mechanical property and wearing resistance.

Description

technical field [0001] The technical solution of the invention relates to the manufacture of silver-based alloys, in particular to the preparation method of carbon-coated nickel nanoparticles reinforced silver-based composite materials. Background technique [0002] Silver-based composites are heterogeneous mixtures with silver or its alloys as the matrix and particles, whiskers or fibers as the reinforcing phase. Due to its superior electrical and thermal conductivity, silver-based composite materials have been widely used as electrical contact materials for high and low voltage electrical appliances in various industrial fields. [0003] The earlier silver-based composite material is a typical silver-graphite composite material, which is widely used to make brushes, sliders and contacts. In this type of silver-graphite composite material, the silver matrix is ​​mainly used to maintain the electrical and thermal conductivity of the composite material, and the self-lubricat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/26C23C16/52
Inventor 李海鹏卢遵铭王立辉陈学广孟凡斌薛海涛
Owner HEBEI UNIV OF TECH
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