Copper Particle Silver Shell Antioxidant Pores
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Solution Overview
Problem
Copper particles are prone to oxidation, which limits their use as conductive and thermally conductive materials due to their high reactivity, and existing coating methods fail to form a uniform silver layer effectively.
Innovation Solution
A copper-containing particle with a silver shell and antioxidant-filled pores is developed, where the silver shell is formed through a galvanic replacement reaction and the pores are filled with an antioxidant component like thiocyanate to prevent oxidation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copper particles are used as conductive material, then electroconductivity and cost-effectiveness are improved, but oxidation resistance deteriorates
Solution Approach 1:
The invention uses a composite structure with a copper core and silver shell, combining the excellent electroconductivity of copper with the oxidation resistance of silver. This creates a material that exhibits properties superior to either component alone, resolving the contradiction between conductivity and oxidation resistance.
Solution Approach 2:
The silver shell acts as an intermediary layer between the copper core and the oxidizing environment. It protects the copper from direct contact with oxygen while allowing electrical current to pass through, thus mediating between the need for conductivity and protection from oxidation.
2Object-affected harmful factors
If copper is coated with silver using existing methods, then oxidation resistance is improved, but coating uniformity deteriorates
Solution Approach 1:
The invention replaces mechanical plating methods with a chemical galvanic replacement reaction. This substitution allows for more uniform coating formation through controlled chemical reactions rather than mechanical processes, resolving the contradiction between oxidation protection and coating uniformity.
Solution Approach 2:
The invention changes the fundamental parameter of the coating process from mechanical deposition to chemical reaction-based deposition. By controlling parameters such as solution composition, temperature, and reaction time, uniform coating thickness can be achieved while maintaining oxidation resistance.
3Object-affected harmful factors
If plating method is used to coat copper particles, then oxidation resistance is improved, but coating formation difficulty increases
Solution Approach 1:
The invention replaces the complex mechanical plating process with a simpler chemical galvanic replacement reaction. This substitution eliminates the need for complex equipment and multiple processing steps, making the coating process easier to implement while achieving the same oxidation protection.
Solution Approach 2:
The galvanic replacement reaction is a self-driven process where the chemical potential difference between copper and silver ions automatically drives the coating formation. This self-service mechanism eliminates the need for external energy input or complex control systems required in plating processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents copper oxidation, forms a uniform coating layer, and enhances the thermal stability of copper particles, allowing them to maintain conductivity at higher temperatures.
Implementation Method 1
forming a shell containing a silver component by coating a surface of a core which contains a copper component with a solution which contains a silver compound
Data Source
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AI summary
The present invention relates to a copper containing particle with a surface layer for preventing oxidation and a method for manufacturing the same, and provides a copper containing particle including: a core containing a copper component; a shell formed on the surface of the core, containing a silver component, and having at least one pore; and a filler part configured to fill the pore of the shell and contain an antioxidant component.