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A kind of silver-coated graphite and its production process

A production process, graphite technology, applied in metal material coating process, liquid chemical plating, fibrous filler, etc., can solve the problems of high price, high cost, complicated process, etc., and achieve the goal of reducing consumption and low resistivity Effect

Active Publication Date: 2015-12-09
TIANNUO PHOTOELECTRIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods all use SnCl 2 As a sensitizer, PdCl 2 As an activator, the sensitization solution and activation solution are difficult to control and easy to decompose. Not only the process is complicated, but also the PdCl 2 Expensive, high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The production process is carried out as follows:

[0028] Degreasing: Put 100-mesh graphite particles into the degreasing solution of sodium hydroxide solution with a weight concentration of 10% at 90°C, and wash with water until neutral after 90 minutes; or place 100-mesh graphite particles in a 350°C furnace for high-temperature treatment 5h;

[0029] Coarsening: the step The degreased graphite particles were placed in a nitric acid solution with a weight concentration of 60%, coarsened at 50°C for 60 minutes, and then washed with water until neutral;

[0030] Copper Plating Activation: Steps to The coarsened graphite particles are placed in an aqueous solution with a weight concentration of silver ammonia solution of 30%, activated for 10 minutes, and washed with water until neutral;

[0031] Copper Plating: Step Put the activated graphite particles into a copper plating solution containing 20g monosodium edetate, 50g copper sulfate, and 10g sodium hy...

Embodiment 2

[0034] The production process is carried out as follows:

[0035] Degreasing: Put 1500-mesh graphite particles into the degreasing solution of sodium hydroxide solution with a weight concentration of 50% at 60°C, wash with water until neutral after 30 minutes; or place the graphite in a furnace at 500°C for high temperature treatment for 1 hour;

[0036] Coarsening: the step The degreased graphite particles were placed in a nitric acid solution with a weight concentration of 10%, coarsened at 90°C for 20 minutes, and then washed with water until neutral;

[0037] Copper Plating Activation: Steps to The coarsened graphite particles are placed in an aqueous solution with a weight concentration of silver ammonia solution of 2%, activated for 30 minutes, and washed with water until neutral;

[0038] Copper Plating: Step Put the activated graphite particles into a copper plating solution containing 80g monosodium edetate, 10g copper sulfate, and 50g sodium hydroxide p...

Embodiment 3

[0041] The production process is carried out as follows:

[0042] Degreasing: Put 1000-mesh graphite particles into the degreasing solution of sodium hydroxide solution with a weight concentration of 30% at 75°C, wash with water until neutral after 60 minutes; or place graphite in a furnace at 420°C for 3 hours at high temperature;

[0043] Coarsening: the step The degreased graphite particles were placed in a nitric acid solution with a weight concentration of 35%, coarsened at 70°C for 40 minutes, and then washed with water until neutral;

[0044] Copper Plating Activation: Steps to The roughened graphite particles are placed in an aqueous solution with a weight concentration of silver ammonia solution of 2-30%, activated for 10-30 minutes, and washed with water until neutral;

[0045] Copper Plating: Step Put the activated graphite particles into a copper plating solution containing 50g monosodium edetate, 30g copper sulfate, and 30g sodium hydroxide per liter, ...

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Abstract

The invention provides silver-plated graphite and a production technology thereof. The production technology comprises the following steps: step 1, graphite particles are placed in oil removal liquid for removing oil for 30-90 minutes, then washing is performed until the graphite particles are neutral, or the graphite particles are placed in a furnace with temperature of 350-500 DEG C for high-temperature treatment for 1-5 hours; 2, the graphite particles, of which the oil is removed in the step 1, are placed in coarsening liquid for coarsening at the temperature of 50-90 DEG C for 20-60 minutes, and then washing is performed until the graphite particles are neutral; 3, the graphite particles coarsened in the step 2 are placed in a silver-ammonia solution for activating for 10-30 minutes, and then washing is performed until the graphite particles are neutral; 4, the graphite particles activated in the step 3 are placed in copper-plated liquid for chemical copper-plating, and then washing is performed until the graphite particles are neutral; 5, the graphite particles plated with copper in the step 4 are placed in silver-plated liquid for chemical silver-plating, then washing is performed until the graphite particles are neutral, and filtration and vacuum drying are performed, so that silver-plated graphite is obtained.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a high-performance silver-coated graphite and a production process thereof. Background technique [0002] With the rapid development of the modern electronics industry, the use of electronic and electrical equipment is becoming more and more extensive. Various miniaturized, integrated, digital, and high-frequency electronic products radiate a large number of electromagnetic waves of different wavelengths and frequencies into the environment. Radiation is becoming more and more serious, and electromagnetic wave interference has become a new environmental pollution. Electromagnetic wave interference can make electronic and electrical equipment or systems not work properly, causing performance degradation or even damage. And when the human body is in the electromagnetic field for a long time, electromagnetic wave radiation can cause endocrine system disorder, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/18C23C18/42C09C1/46C09C3/06
Inventor 朱焰焰郑杰郭丽丽马苹苹张茂功郭涵
Owner TIANNUO PHOTOELECTRIC MATERIAL
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