Water-based pure copper brazing paste is generally composed of pure copper powder and water, this brazing paste is very environmentally friendly, fast evaporation, simple and convenient low-cost, but the appearance of the brazing paste is relatively rough, easy to delamination, is not suitable for higher degree of automation similar to the syringe injection injection feeding method, and the pure copper powder will be a slow chemical reaction with the water resulting in storage time is not long enough.
Aqueous organics do not contain water, but can be miscible or blended with water or aqueous organic solvents. Its advantages are also obvious: easy to mix; compared to water, its chemical activity is difficult to chemical reaction with pure copper powder, thus ensuring that the shelf life of the brazing paste becomes longer; and its viscosity than the water to enhance a lot, which can effectively prevent the pure copper powder and organic into the paste body of the delamination, which effectively improve the quality and stability of the brazing paste; at the same time, the water-based organic lubrication increased, thus ensuring the appearance of the brazing paste is smooth and delicate, effectively improve the Production automation level.
Aqueous organics do not contain water, but can be miscible or blended with water or aqueous organic solvents. Its advantages are also obvious: easy to mix; compared to water, its chemical activity is difficult to chemical reaction with pure copper powder, thus ensuring that the shelf life of the brazing paste becomes longer; and its viscosity than the water to enhance a lot, which can effectively prevent the pure copper powder and organic into the paste body of the delamination, which effectively improve the quality and stability of the brazing paste; at the same time, the water-based organic lubrication increased, thus ensuring the appearance of the brazing paste is smooth and delicate, effectively improve the Production automation level.
Pure Copper Brazing Paste Application: Cu – Cu; Cu – Stainless Steel
Brazing Process: Ammonia decomposition protective atmosphere tunnel furnace
Recommended Particle Size: -200 mesh
Copper Powder Type: Gas Atomization Pure Copper Powder
More Tips:
- Due to the relative chemical inertness of pure copper and the brazing process will produce hydrogen reduction, water-based pure copper brazing paste containing brazing agent is generally not added;
- Pure copper brazing paste on the pure copper powder spherical degree requirements, it is recommended to use gas atomized pure copper powder, but the oxygen content is not required;
- The degree of automation and brazing treatment requirements are not high selection of water-based pure copper brazing paste, and vice versa, the selection of water-based organic pure copper brazing paste;
- Water-based organics in the brazing paste accounted for between 15-20% of the brazing paste, the brazing paste of the automatic charging and brazing effect is the best.
