▎ 摘　　要

NOVELTY - Preparation of graphene-loaded diboride superconductive bulk material involves dissolving graphene oxide in ethanol and water mixed solution, adding ethyl silicate and ethyl titanate, stirring, hydrothermally reacting, filtering, washing filter residue, vacuum-drying, heat-treating, obtaining graphene-loaded multi-component powder, mixing boron powder and magnesium powder with boron and magnesium atomic ratio of 2:1, adding graphene-loaded multi-component powder, uniformly grinding, sintering in an inert atmosphere, and cooling to room temperature. USE - Preparation of graphene-loaded diboride superconductive bulk material (claimed). ADVANTAGE - The method enables preparation of graphene-loaded diboride superconductive bulk material with high activity, and reduced phase temperature of doped magnesium diboride, without agglomeration of dopant, by simple process. DETAILED DESCRIPTION - Preparation of graphene-loaded diboride superconductive bulk material involves dissolving graphene oxide in ethanol and water mixed solution, obtaining an enriched graphene solution, adding ethyl silicate and ethyl titanate to the graphene solution, stirring, hydrothermally reacting at 50-150 degrees C for 0.5-3 hours, filtering, washing filter residue, vacuum-drying, heat-treating obtained graphene-loaded multi-component mixed powder in a reducing atmosphere, obtaining graphene-loaded multi-component powder, mixing boron powder and magnesium powder with boron and magnesium atomic ratio of 2:1, adding graphene-loaded multi-component powder, uniformly grinding, sintering in an inert atmosphere, and cooling to room temperature. The content of graphene-loaded multi-component powder is 2-5 %mass with respect to the total amount of boron powder and magnesium powder. The volume ratio of ethanol and water in ethanol and water mixed solution is 0.5-5:1. The concentration of graphene solution is 0.01-10 mg/mL.