Bi-2212超导线材研究进展

Research progress of Bi-2212 superconductor

Bi-2212高温超导材料在高磁场中具有优异的磁场载流能力,可制备成各向同性圆线,可以绞制成大电流的电缆导体,是大型强磁场磁体的首选材料之一。经过30多年的发展,Bi-2212超导线材的临界工程电流密度(J_(E))也已达到工程应用要求。综述了国内外近年来Bi-2212超导材料在载流性能、绝缘、内插线圈和热处理等方面的研究进展。

Bi-2212 high-temperature superconductor has excellent current carrying capacity in high magnetic fields. It can be made into isotropic round wire and can be twisted into high-current cable conductors. It is one of the first choice materials for large strong magnetic fields. After more than 30 years of development, the critical current density(J_(E)) of Bi-2212 superconducting wire has reached the requirements of engineering applications. This article reviewed the research progress of Bi-2212 superconducting materials in recent years at home and abroad in terms of current carrying performance, insulation, insert coils and heat treatment.