Anti oxidation silver copper paste for electromagnetic shielding

Electromagnetic shieldingAntioxidant silver copper pasteIt is a material with broad application prospects in the field of electromagnetic shielding. It combines the advantages of silver and copper, overcoming the drawbacks of single use, especially in terms of oxidation resistance and conductivity.

1、 Composition of silver copper paste

The antioxidant silver copper paste for electromagnetic shielding is mainly composed of the following components:

1. Silver coated copper powder: This is the main component of silver copper paste, and its content is usually in the range of50%～60%between. Silver coated copper powder is a composite material that wraps a silver layer around the surface of copper powder. This structure retains the high conductivity of copper and improves the material's oxidation resistance through the silver layer.

2. Flake silver powder: content in5%～8%Between them, used to further improve the conductivity of silver copper paste.

3. Polymer resin: As a carrier material, its content is7%～10%Between them, used to bond silver copper powder and other additives together to form a uniform slurry.

4. Organic additives: content in2%～4%Between them, used to adjust the viscosity and fluidity of silver copper paste.

5. Organic solvents: content in20%～30%Between them, it is used to dissolve polymer resins and other additives, so that silver copper powder can be uniformly dispersed in it.

2、 Preparation method

Electromagnetic shieldingAntioxidant silver copper pasteThe preparation process mainly includes the following steps:

1. Add the polymer resin and organic solvent together into the dissolution kettle and stir to fully dissolve the polymer resin.

After standing for a period of time, filter out impurities to obtain the carrier.

3. Add the prepared carrier along with other components (including silver coated copper powder, flake silver powder, organic additives, etc.) to a high-speed disperser for grinding.

4. Control the fineness of silver copper paste to be less than10μmAnd adjust the viscosity of the silver copper paste to10～20Pa·S.

5. After filtering out impurities, silver copper paste products are produced.

3、 Performance characteristics

1. Excellent antioxidant properties: The structure of silver coated copper powder covers the surface of the copper powder with a silver layer, effectively isolating air and improving the material's antioxidant properties.

2. Good conductivity: The addition of silver coated copper powder and flake silver powder makes the silver copper paste have good conductivity.

3. Stable performance: After prolonged natural storage, the conductivity of silver copper paste remains almost unchanged, indicating good stability.

4. Low temperature curing:Antioxidant silver copper pasteCan be in200℃The rapid curing at low temperatures below is beneficial for reducing energy consumption and costs in practical applications.

In summary, the antioxidant silver copper paste for electromagnetic shielding is a material with excellent performance and broad application prospects in the field of electromagnetic shielding.