The practical low-temperature superconducting materials are mainly NbTi and Nb3Sn superconducting wires. The main differences between NbTi and Nb3Sn are as follows: NbTi is a binary alloy with good processing plasticity, high strength, low manufacturing cost, low critical magnetic field, mainly used for magnetic fields below 10T; Nb3Sn is an intermetallic compound, which is a brittle material, Poor processing performance and high manufacturing cost, but the critical magnetic field is high, mainly used for magnetic fields above 10T.
Superconducting magnets generally refer to superconducting coils wound with superconducting wires that can generate strong magnetic fields, and also include low-temperature constant-temperature containers necessary for their operation. Generally, electromagnets use a current passing through a conductor to generate a magnetic field. Since a superconducting material has zero resistance in a superconducting state, it can pass a huge current in a very small area. Superconducting magnets have the characteristics of high field strength, small size and light weight. Based on the generated strong magnetic field, the main application fields of superconducting magnets include MRI, MCZ, NMR, ITER, accelerators, special magnets for scientific research, etc.