Superconducting strip or wire applied to strong magnetic field

Abstract

The invention relates to a superconducting strip or wire applied to a strong magnetic field. A superconducting material is a rare earth barium copper oxide material. A molecular formula is REBa<2>Cu<3>O<7-delta> (REBCO for short). RE is Yb or rare earth ion combination containing the Yb. A rare earth barium copper oxide superconducting material containing the Yb shows an excellent strong magneticfield characteristic under a temperature environment below 50K, in particular, under a temperature below 20K and a strong magnetic field. Critical current density of the REBCO superconducting materialcontaining the Yb is higher than that of the superconducting material containing no Yb. Speed that the critical current density of the REBCO superconducting material containing the Yb is risen and reduced along with magnetic field intensity is slower than the speed that the critical current density of the superconducting material containing no Yb is risen and reduced along with the magnetic fieldintensity. The superconducting strip or wire provided by the invention can be used as a coil winding superconducting material in any strong magnetic field and strong electric device such as magneticresonance imaging, an particle accelerator, a thermonuclear fusion reactor, a tokamak, magnetic separation mineral processing, a motor, a generator and a magnetic energy storage system.

Description

technical field [0001] The invention relates to the technical field of superconducting materials, in particular to a high-temperature superconducting wire or strip with excellent strong magnetic field properties. Background technique [0002] In most strong electric applications, superconducting wires work in a strong magnetic field, so improving the critical current of superconducting wires in a strong magnetic field, that is, high field characteristics (or high magnetic field characteristics), is a key in the field of superconducting materials topic. Rare earth barium copper oxide (REBa 2 Cu 3 o 7-δ , or abbreviated as REBCO, where RE is a rare earth element, such as Y, Gd, Sm, etc.) The high-temperature superconducting film is the core component of the second-band high-temperature superconducting wire, which has excellent loading at liquid nitrogen temperature (77K) At the same time, the rare earth barium copper oxide has the strongest upper critical magnetic field am...

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Problems solved by technology

[0004] When the rare-earth barium-copper-oxygen high-temperature superconducting materials mentioned in the prior art, the RE therein is usually a single rare earth element, or is yttrium (Y), gadolinium (Gd), samarium (Sm), neodymium ( Nd), europium (Eu), dysprosium (Dy), holmium (Ho), erbium (Er), or a combination of two or more, of which there are few related ytterbium-barium-copper oxide materials YbBa 2 Cu 3 o 7-δ There are almost no reports on the application of materials in superconducting strips or wires, and there are almost no research reports on the characteristics and applications of rare earth barium copper oxide superconducting materials containing ytterbium (Yb) ions.

This is mainly because: Most of the previous studies on the optimal selection of rare earth elements RE in REBCO superconducting materials were carried out at 77K temperature, but due to the critical temperature Tc and 77K temperature of the rare earth barium copper oxide material containing ytterbium The current density Jc is relatively low, which makes most researchers almost give up the research and exploration of rare earth barium copper oxide materials containing Yb ions, and causes Yb in rare earth barium copper oxide superconducting materials to never appear in actual production applications.

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