1. Cost Advantage
Low Price: Aluminum is an abundant raw material, and its price is much lower than copper, making aluminum capillary tubes more cost-competitive.
Low Processing Cost: The processing technology for aluminum capillary tubes is relatively simple, facilitating mass production and further reducing production costs.
2. Lightweight
Lightweight: Aluminum's density is approximately 2.7 g/cm³, significantly lower than copper's 8.9 g/cm³. In applications requiring lightweight design (such as aerospace and automotive), aluminum capillary tubes can significantly reduce equipment weight.
3. Processing Performance
Easy to Process: Aluminum has good ductility and plasticity, making it easy to bend, cut, and shape, suitable for complex processing techniques.
Convenient Connection: Aluminum capillary tubes can be connected in various ways, such as welding and threaded connections, making installation and maintenance more convenient.
4. Corrosion Resistance
Surface Protection: Aluminum naturally forms a dense oxide film in air, exhibiting excellent corrosion resistance, especially in humid and acidic/alkaline environments.
Special Treatments: Surface treatments (such as stearic acid and fluorosilane modification) can further enhance the corrosion resistance of aluminum capillaries.
5. Thermal Conductivity
Good Thermal Conductivity: Aluminum has a high thermal conductivity (approximately 200-237 W/m·K), enabling rapid heat transfer and making it suitable for applications requiring efficient heat dissipation.
6. Environmental Protection and Sustainability
Recyclability: Aluminum is a recyclable material with high recycling value, meeting the requirements of environmental protection and sustainable development.
7. Expanding Application Scenarios
Emerging Fields: Aluminum capillaries have broad application prospects in emerging fields such as microelectromechanical systems (MEMS), LED lighting, and cold storage systems.
Disadvantages
While aluminum capillaries offer many advantages, they are still inferior to copper capillaries in some aspects:
Strength and Pressure Resistance: Aluminum has relatively low mechanical strength and pressure resistance, which may make it unsuitable for high-pressure applications.
Conductivity: Copper has better conductivity than aluminum, therefore copper capillaries remain the preferred choice for electrical applications requiring high conductivity.
