▎ 摘　　要

NOVELTY - The preparation of graphene-composite iron (Fe) (selenium (Se), tellurium (Te)) superconducting material involves: placing mixed powder in an agate mortar and grinding for 30-120 minutes; putting the ground mixed powder into a tableting mold and compressing at 5-18 MPa for 10 minutes to obtain Fe-Se-Te blank body; sealing the blank body with a hydrogen-oxygen flame, sintering at 900 degreesC for 24-72 hours and cooling to room temperature to obtain the Fe(Se,Te) superconducting material block; high-energy ball milling of the Fe(Se,Te) superconducting material block together with graphene at a rotation speed of \~1500 revolution per minute for 1-10 hour to obtain graphene mixed Fe(Se,Te) superconducting powder; and loading the graphene mixed Fe(Se,Te) superconducting powder into a graphite mold, and performing spark plasma sintering at 400degreesC for 1-10 minutes under vacuum, and cooling to room temperature at a rate of \~30degreesC/hour. USE - The method is useful for preparing graphene composite Fe(Se, Te) superconducting material used to prepare Fe(Se,Te) superconducting wire for iron-based superconductors. ADVANTAGE - The method uses graphene as dopant to perform doping composite to superconducting material block, using excellent physical and chemical properties of graphene as lubricant of grain boundary, under the premise of not reducing the system super-conducting performance, effectively reducing the elastic modulus of the Fe-Se system. It is good for reducing the mechanical property difference of Fe-Se super-conductor material and the outer sleeve in the Fe(Se, Te) super-constraining wire strip prepared by powder loading method, avoiding the core-breaking phenomenon, so as to improve the mechanical properties and superconductance performance of the Fe-Se superconductor wire strip. The method has small energy consumption, simple process, and has strong repeatability. The process of adopting high-energy ball milling for graphene doping not only greatly shortens the time required for grinding, but also avoids the powder caused by long-term grinding. The problem of oxidation, and the mixed powder distribution is more uniform after high-energy ball milling, and the doping effect of graphene is better. The Fe(Se,Te) superconducting wire prepared by using the graphene composite Fe(Se,Te) superconducting material is not easy to break the core, has excellent mechanical properties and superconductivity, and meets the need for iron-based superconducting in subsequent industrial applications. The requirements of wire performance are suitable for industrialized mass production.