Superconducting materials refer to materials that exhibit the properties of zero resistance and repelling magnetic field lines under certain low temperature conditions. It has been found that 28 elements and thousands of alloys and compounds can be superconductors.
The Tc of Nb (Nb) is the highest, which is 9.26K. Niobium and lead (Pb, Tc=7.201K) have been used in the manufacturing of superconducting ac power cables and high Q resonators.
Superconducting elements add certain other elements as alloys
Study on properties of superconducting materials
Study on properties of superconducting materials
All the properties of superconducting materials can be improved. For example, nb-75zr is the first niobium zirconium alloy (nb-75zr), its Tc is 10.8k, Hc is 8.7t. Subsequently, niobium titanium alloy was developed. Although Tc was slightly lower, Hc was much higher and could carry more current in a given magnetic field. Its performance is nb-33ti, Tc= 9.3k, Hc=11.0; Nb-60Ti, Tc=9.3K, Hc=12 (4.2K). The properties of nb-60ti-4ta are Tc= 9.9k, Hc=12.4 (4.2k). The performance of nb-70ti-5ta is Tc= 9.8k, Hc= 12.8t.
Superconducting materials have shown an attractive application prospect since their discovery due to their excellent properties. However, the practical application of superconducting materials is restricted by a series of factors, such as the critical parameter of the materials and the manufacturing process (for example, how to make brittle superconducting ceramics into fine wire has a series of technical problems). To the 80's, the application of superconducting materials are mainly: (1) the use of materials superconductivity can be made of magnets, applied to motors, high energy particle accelerator, magnetic suspension transport, controlled thermonuclear reaction, energy storage, etc.; It can be used to produce power cables for large capacity transmission (power up to 10000MVA); It can be used to make communication cables and antennas, and its performance is better than that of conventional materials. (2) using the material's complete diamagnetism can make frictionless gyroscope and bearing. The Josephson effect can be used to make a series of precision measuring instruments and radiation detectors, microwave generators, logic elements. Using Josephson junction as the logic and memory components of the computer, the computing speed is 10 ~ 20 times faster than the high performance integrated circuit, and the power consumption is only a quarter.
