How to improve the antioxidant performance of antioxidant conductive copper paste?

Brief introduction

Antioxidant conductive copper paste has broad application prospects in many fields such as electronics and energy. However, the oxidizability of copper is a key factor limiting its performance. Improving the antioxidant performance of conductive copper paste is crucial for expanding its application range and enhancing product reliability. This article will explore various methods to improve the antioxidant performance of conductive copper paste, and explain them based on data. At the same time, it will introduce the advanced technology of Advanced Institute (Shenzhen) Technology Co., LtdYB5107 antioxidant copper paste from Yanbo brandRelated characteristics in this regard.

2、 Oxidation problem of antioxidant conductive copper paste

Copper is easily oxidized in air, especially in harsh environments such as high temperature and humidity, where the oxidation rate significantly accelerates. Untreated copper paste may form a layer of copper oxide with a thickness of about 1-2 μ m on its surface after being exposed to normal temperature and pressure for 24 hours, which can lead to a 30% -50% decrease in conductivity.

3、 Methods to improve antioxidant performance

（1） Copper powder surface treatment

1. Coating treatment
   • Using metal coating is a common method. For example, usingSilver coated copper powderIt can effectively improve antioxidant activity. Research has shown that when the thickness of the silver coating reaches 0.1-0.2 μ m, the oxidation rate of copper powder can be reduced by 80% -90% compared to uncoated copper powder at high temperatures (150 ℃). This is because silver has good antioxidant properties, which can prevent oxygen from coming into contact with copper powder.
   • For the YB5107 antioxidant copper paste of Yanbo brand, a special coating technology is used to form a uniform and dense coating layer on the surface of the copper powder, effectively improving the antioxidant performance.
2. Chemical modification
   • Chemical modification of copper powder is also an effective means to improve its antioxidant properties. For example, by introducing organic functional groups such as thiol (- SH) on the surface of copper powder. When the coverage of thiol groups on the surface of copper powder reaches 30% -40%, the oxidation degree of copper powder can be reduced by about 60% -70% compared to unmodified copper powder in a humid environment (relative humidity of 80%). This is because thiol groups can form chemical bonds with copper, preventing the reaction between oxygen and copper.

（2） Add antioxidant

1. Organic antioxidant
   • The addition of organic antioxidants such as phenolic antioxidants can effectively improve antioxidant performance. When 1% -3% phenolic antioxidants are added to copper paste, the antioxidant performance of the copper paste increases by about 40% -50% compared to copper paste without antioxidants after 6 months of storage at room temperature. This is because phenolic antioxidants can provide hydrogen atoms to prevent copper oxidation reactions.
   • YB5107 antioxidant copper paste from Yanbo brandSpecific organic antioxidants have been added to the product, and after testing, it has shown excellent antioxidant performance during long-term storage.
2. Inorganic antioxidant
   • Inorganic antioxidants such as phosphates can also be used to enhance antioxidant performance. For example, adding 0.5% -1.5% phosphate antioxidants can extend the antioxidant time of copper paste by about 50% -60% at high temperatures (120 ℃). This is because phosphate antioxidants can form a protective film on the surface of copper, preventing the invasion of oxygen.

（3） Optimize formula and process

1. Adjust the adhesive
   • Choosing the appropriate adhesive and optimizing its dosage can improve its antioxidant performance. For example, using resin binders with high barrier properties, when the content of the binder is between 10% and 15%, compared to ordinary binders, the antioxidant performance of copper paste can be improved by about 30% to 40% in high humidity (relative humidity of 90%) environments. This is because high barrier adhesives can reduce the contact between oxygen and moisture and copper powder.
   • The YB5107 antioxidant copper paste of Yanbo brand has improved the overall antioxidant performance of the copper paste by optimizing the binder formula.
2. Improve the preparation process
   • Adopting advanced preparation techniques, such as preparing copper paste under inert gas protection, can reduce the oxidation of copper powder during the preparation process. The initial oxidation degree of copper paste prepared under nitrogen protection can be reduced by about 70% -80% compared to copper paste prepared in air. This is because inert gases can eliminate oxygen and prevent copper powder from oxidizing.

4、 Conclusion

improveAntioxidant conductive copper pasteThe antioxidant performance needs to be approached from multiple aspects such as surface treatment of copper powder, addition of antioxidants, optimization of formula and process, etc. By comprehensively applying these methods, the antioxidant performance of antioxidant conductive copper paste can be significantly improved to meet the needs of different application scenarios. Advanced Institute (Shenzhen) Technology Co., Ltd.'s YB5107 antioxidant copper paste adopts various advanced technologies to improve its antioxidant performance, providing a reliable product choice for the application of antioxidant conductive copper paste.
The above data is for reference only, and specific performance may vary due to production processes and product specifications.