Copper is not only widely used in traditional industries, but also plays a vital role in numerous emerging industries and high-tech fields. Today, we will explore copper's applications in industries such as computers, superconductors and cryogenics, aerospace technology, and high-energy physics.
1. Computer Field
Information technology is at the forefront of high technology. It relies on computers-the crystallization of modern human ingenuity-to process and handle rapidly changing and vast amounts of information.
The heart of a computer consists of a microprocessor (including an arithmetic unit and a controller) and memory. These basic components (hardware) are large-scale integrated circuits (ICs). Millions of interconnected transistors, resistors, capacitors, and other components are distributed on tiny chips to perform rapid numerical and logical operations and store large amounts of information. These ICs operate only when assembled using lead frames and printed circuit boards.
Copper and copper alloys are not only important materials in lead frames, solder, and printed circuit boards, but also play a vital role in interconnecting the tiny components of an IC. 2. Superconductivity and Low-Temperature Fields
The electrical resistance of general materials (except semiconductors) decreases with decreasing temperature. When the temperature drops very low, the resistance of some materials disappears completely, a phenomenon known as superconductivity. The maximum temperature at which superconductivity occurs is called the material's critical superconducting temperature.
The discovery of superconductivity has opened up new avenues for the use of electricity. With zero resistance, a very small applied voltage can generate a very large (theoretically infinite) current, resulting in a huge magnetic field and force. Alternatively, when current passes through it, there is no voltage drop or energy loss.
It is clear that its practical application will revolutionize human production and life, and is attracting considerable attention.
However, for ordinary metals, superconductivity only occurs when the temperature drops very close to absolute zero (-273°C), making it difficult to achieve in engineering. In recent years, some superconducting alloys have been developed with critical temperatures higher than those of pure metals, such as Nb3Sn alloy, which has a critical temperature of 18.1K. However, their application is inextricably linked to copper. First, these alloys must operate at ultra-low temperatures, achieved through the liquefaction of gases. For example, the liquefaction temperatures of liquid helium, liquid hydrogen, and liquid nitrogen are 4K (-269°C), 20K (-253°C), and 77K (-196°C), respectively. Copper maintains excellent toughness and ductility at these low temperatures, making it an indispensable structural and piping material in cryogenic engineering.
Furthermore, superconducting alloys such as Nb3Sn and NbTi are very brittle and difficult to process into shaped pieces, requiring copper sheathing to hold them together. These superconducting materials are currently used in the manufacture of strong magnets, found in medical MRI scanners and high-powered magnetic separators in some mines.
Magnetic levitation trains currently under development, capable of exceeding 500 kilometers per hour, will also rely on these superconducting magnets to levitate the train, avoiding the resistance of wheel-rail contact and enabling high-speed operation.
III. Aerospace Technology
In addition to microelectronic control systems, instruments, and instrumentation, many key components in rockets, satellites, and space shuttles utilize copper and copper alloys. For example, the combustion and thrust chambers of rocket engines can be cooled using steel's excellent thermal conductivity to maintain temperatures within acceptable limits.
The Ariana 5 rocket's combustion chamber uses a copper-silver alloy. 360 cooling channels are machined into this chamber, and liquid hydrogen is introduced for cooling during launch.
Copper alloys are also a standard material for load-bearing components in satellite structures. Satellite solar panels are typically made from alloys of copper and several other elements.
The company has a cluster of leading copper processing production lines in China, including:
German imported precision copper tube production line (annual output of 30,000 tons)
Japanese technology copper foil rolling line (thinnest up to 6μm)
Fully automatic copper bar continuous extrusion line
Intelligent copper sheet and strip finishing mill unit
Digitalized control and management of the whole production process is realized through MES system, and the dimensional accuracy of the products can reach ±0.01mm.
