Electrical research institute of Chinese academy of sciences has announced that it researcher Ma Yanwei international team developed the first 100 meters long scale of iron-based superconductor. This is the iron-based superconductor materials from the laboratory to industrialization of a new milestone. At present, the United States, Japan, Europe and other countries in the world of iron base preparation is still in the superconducting line level meters. How to break through the hundreds of meters level of high performance iron-based superconductor long-term preparation technology is the key to the application of its size, is also the current major technical difficulties.

Ma Yanwei team in international development in 2008, the first root iron base superconducting wires, then in the physical chemistry of iron-based superconductor phase, element doping, line strip timber, heat treatment process, microstructure of in-depth study, master the use cost low powder loading in the preparation of high performance iron-based superconductor line strip of a set of key technologies, and strip the iron-based superconductor line of current-carrying performance has maintained the international leading level. In 2010, the first study of the iron base superconducting precursor powder sintering process, first lay the foundations for the current-carrying wire can significantly improve performance. In 2013, the successful preparation of the first root of high performance iron-based superconductor multiconductor; In 2014, the first was the first international root 10 meters long scale of high performance iron-based superconductor, out of the wire the first step on the scale preparation.

On this basis, the team further explore iron-based superconductor wire scale preparation technology, through the study of superconducting structure design of a long and optimizing processing technology experiment, successfully solved the iron-based superconductor line scale preparation of the technical difficulties of uniformity, stability and repeatability, finally was the length of 115 meters long iron-based superconductor. Tested the current-carrying capacity showed good uniformity and attenuation characteristics of weak magnetic field in 10 winters up under the magnetic field of critical current density of more than 12000 ampere per square centimeter. Experts point out that the major breakthrough suggests that our country has already mastered the with independent intellectual property rights of iron-based superconductor long-term preparation technology, laid the iron-based superconductor materials in industrial, medical, defense, and many other fields of application.