At present, about 14% of the aluminum produced in the world is used as electrical materials, of which almost all power conductors are aluminum. However, the amount of indoor wires is still limited. The aluminizing rate on the wire is calculated as C2A1/(Cu + 2A1) 3 x 100%. The highest aluminizing rate is in the United States, reaching about 35%. The amount of aluminum used in China’s electrical sector accounts for about one-third of the country’s aluminum consumption, and the annual order of conductive aluminum pipes reaches about 500 tons. It can be seen that the development of electrical aluminum materials and the vigorous promotion of replacing copper with aluminum have significant economic value.
Due to its low density, good conductivity, corrosion resistance, and easy processing, aluminum is widely used in the electrical and electronic industries. To expand new uses of aluminum, broaden new markets for aluminum, and improve economic benefits, it is necessary to explore further the application and development of aluminum in high-tech fields.
In the field of electrical and electronic industries, the reason why aluminum is handy is that aluminum has comprehensive properties that other metals do not have: good electrical conductivity, second only to silver and copper, suitable for conduction; low density, the same electrical conductivity Under the standard of aluminum alloy, the weight of aluminum conductor is only half that of copper, which is convenient for erection and transportation, and can significantly increase the wire span; aluminum has good corrosion resistance, and there is a thick oxide film on the surface of aluminum, which makes the aluminum conductor in the atmospheric environment It has high corrosion resistance (but the oxide film is an electrical insulator and must be eliminated when the aluminum conductor is connected. Otherwise it will affect the conductivity). Good heat dissipation. The thermal conductivity of aluminum is 231 W/m•Kelvin, and the thermal conductivity of copper is 436 W/m•Kel. Although the thermal conductivity is lower than that of copper, the surface area of the aluminum conductor is much larger than that of copper. , Its ability to dissipate current and heat is much higher than that of copper. Because aluminum has the above-mentioned good properties, aluminum is also widely used in the electrical and electronic industries.
1. Application of aluminum in antenna
With the advent of the information era, more than 7,000 broadcast satellites, communication satellites, and weather satellites have been launched worldwide. An aluminum parabolic antenna that tracks artificial earth satellites is the receiving device used on the ground to receive the radio waves sent by these satellites. Most of the parabolic antennas are LD 31 alloy extruded profiles and LF2 alloy plates for telephone, TV, fax, data processing, and communication services on communication satellites and antennas for aircraft navigation. These two alloys have good corrosion resistance and good conductivity. Communication equipment is a rapidly developing industrial field in the future, and the amount of aluminum in these areas will increase.
2. The application of aluminum in electronic components
In recent years, the application of aluminum in electronic instruments and their parts has been widely popularized. This development trend is closely related to the technological progress of magnetic memory devices, semiconductors, and IC technology. The aluminum used in electronic instruments and their accessories mainly depends on the development of various material manufacturing technologies, precision processing methods, and mass-production technology.
The further development of electronic instruments and their components has now become lighter, thinner, and shorter. To achieve this goal, aluminum structural parts will play an important role. In addition to low density, excellent electrical conductivity, and heat dissipation, aluminum has non-magnetic properties, reflective radio wave properties, anodic oxidation properties, good workability, and machinability.
3. Application of Aluminum 1060 in Household Appliances
①. Video recorder (VTR)
The cylinder for the video recorder conveyor belt needs to be aluminum with a low thermal expansion coefficient, good wear resistance, easy cutting, and no cutting strain. For this reason, LD11 alloy or 2218 alloy can be used.
②. Rice cooker
L5-1 and LF21 alloys can be used to manufacture rice cookers. The manufacture of electric rice cookers requires chlorine-coated resin aluminum plates. Before coating the chlorine resin, the surface of the aluminum plates is roughened by electrochemical or chemical methods to increase the surface area to increase the bonding force with the resin.
③. Refrigerators and freezers
The inner and outer wall panels of refrigerators and freezers are aluminum panels with soft colors and high corrosion resistance. When the thermal insulation material between the aluminum plates (urethane resin foam material) is increased to 50 to 100 times the thickness of the aluminum plate, the thermal conductivity of the wall plate material is hardly affected. The commonly used aluminum plates are LF21, 3005, 3105 alloys, and so on. The surface is anodized and painted.
Because aluminum 1060 has unique properties, it has a lot to do in the electrical and electronic industries. To expand the application scope of aluminum in this field, it is necessary to conduct more in-depth research and development to obtain more significant economic benefits and broaden the new market for aluminum.