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Graphene-silver composite electrode preparation method and application thereof

A silver composite electrode, graphene technology, applied in the direction of fixed capacitor electrodes, fixed capacitor parts, circuits, etc., can solve the problem of coating welding heat resistance, solderability and adhesion decline, component electrical performance decline, capacitor performance decline. and other problems, to achieve the effect of large insulation resistance, increased withstand voltage performance, and reduced diffusion degree

Active Publication Date: 2017-08-18
SUZHOU HAILINGDA EIECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, due to improper selection of silver electrode paste or improper silver electrode firing heat treatment process, the silver layer is not dense, and bubbles and pinholes appear. Problems such as performance degradation, the present invention is committed to improving the production process of ceramic capacitor electrodes, in order to expect to solve the above-mentioned problem of capacitor performance degradation caused by silver electrode diffusion, and expect that the graphene-improved ceramic capacitors produced can meet the needs of the industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add 100ml of 98% concentrated sulfuric acid into a dry beaker, put the beaker into the ice-water mixture to pre-cool for 5 minutes, then add 5 parts of flake graphite and 2 parts of sodium nitrate while stirring, and then slowly add 15 parts of permanganese Potassium acid, keep the temperature of the reactant below 10°C, and stir for 90 minutes. The flake graphite needs to be sieved in advance, and the sieve aperture is 32 mesh;

[0030] (2) Put the reactants in step (1) together with the beaker in a water bath at 35°C for 20 minutes;

[0031] (3) Heat the reactant in step (2) together with the beaker to 90°C, add 200ml of deionized water to the reactant, stir well, put the reactant together with the beaker in the ice-water mixture to cool, then add 5ml 30% hydrogen peroxide, after stirring evenly, filter to get the sediment, the filter aperture is 24 mesh;

[0032] (4) washing the precipitate in step (3) with 5% hydrochloric acid solution for 3 times, and then dry...

Embodiment 2

[0042] (1) Add 100ml of 98% concentrated sulfuric acid into a dry beaker, put the beaker into the ice-water mixture to pre-cool for 5 minutes, then add 5 parts of flake graphite and 2 parts of sodium nitrate while stirring, and then slowly add 15 parts of permanganese Potassium acid, keep the temperature of the reactant below 10°C, and stir for 93 minutes. The flake graphite needs to be sieved in advance, and the sieve aperture is 32 mesh;

[0043] (2) Put the reactants in step (1) together with the beaker in a water bath at 35°C for 23 minutes;

[0044](3) Heat the reactant in step (2) together with the beaker to 90°C, add 200ml of deionized water to the reactant, stir well, put the reactant together with the beaker in the ice-water mixture to cool, then add 5ml 30% hydrogen peroxide, after stirring evenly, filter to get the sediment, the filter aperture is 24 mesh;

[0045] (4) washing the precipitate in step (3) with 5% hydrochloric acid solution for 3 times, and then dryi...

Embodiment 3

[0055] (1) Add 100ml of 98% concentrated sulfuric acid into a dry beaker, put the beaker into the ice-water mixture to pre-cool for 5 minutes, then add 5 parts of flake graphite and 2 parts of sodium nitrate while stirring, and then slowly add 15 parts of permanganese Potassium acid, keep the temperature of the reactant below 10°C, and stir for 98 minutes. The flake graphite needs to be sieved in advance, and the sieve aperture is 32 mesh;

[0056] (2) Put the reactants in step (1) together with the beaker in a water bath at 35°C for 28 minutes;

[0057] (3) Heat the reactant in step (2) together with the beaker to 90°C, add 200ml of deionized water to the reactant, stir well, put the reactant together with the beaker in the ice-water mixture to cool, then add 5ml 30% hydrogen peroxide, after stirring evenly, filter to get the sediment, the filter aperture is 24 mesh;

[0058] (4) washing the precipitate in step (3) with 5% hydrochloric acid solution for 3 times, and then dry...

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Abstract

The invention discloses a graphene-silver composite electrode preparation method, and the method comprises the steps: mixing the prepared graphene oxide dispersion liquid and silver nitrate, carrying out the electrophoretic deposition, flushing, stoving, coating, two-segment sintering, and polishing, and obtaining a graphene-silver composite electrode. The graphene-silver composite electrode is used in a high-voltage ceramic capacitor. Compared with a conventional silver electrode, the graphene-silver composite electrode greatly reduces the diffusion degree, and effectively improves the overall voltage resistance of the ceramic capacitor. Moreover, the insulating resistance of the capacitor is large, and the capacitor is not liable to be aged, and is better in application prospect.

Description

technical field [0001] The invention relates to the technical field of ceramic capacitor materials, in particular to a preparation method and application of a graphene-silver composite electrode. Background technique [0002] Chip multilayer ceramic capacitors are one of the most basic components required by electronic machines. It is characterized by small size, light weight, small equivalent series resistance, good frequency impedance characteristics, non-polarity (not affected by the impact of reverse voltage in the circuit), suitable for surface mounting, etc. It can be used in timing, delay circuit, coupling circuit, filter, etc. At present, there are few mature products of high-voltage multilayer ceramic capacitors in the domestic market, and there is still a certain gap compared with foreign products. Multilayer high-voltage ceramic capacitors have high operating frequency and high (high frequency / radio frequency) electrical strength, and are widely used in power am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/008H01G4/30
CPCH01G4/0085H01G4/30
Inventor 黄啸谷张其土
Owner SUZHOU HAILINGDA EIECTRONIC TECH CO LTD
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