▎ 摘　　要

NOVELTY - Preparing graphene-loaded ferroferric oxide magnetic powder particles comprises (i) mixing iron(III) chloride hexahydrate, iron(II) chloride tetrahydrate and sodium hydroxide uniformly with aqueous graphene oxide solution to obtain mixed solution A, (ii) adding mixed solution A and refluxing at constant temperature, allowing the generated iron(II) hydroxide and iron(II) hydroxide gradually grow as core particles, and then adding aqueous ammonia into the reaction system to obtain mixed solution B, (iii) reacting the mixed solution B under constant temperature to obtain reaction solution, and (iv) centrifuging the reaction solution to obtain a solid substance, washing and drying to obtain final product. USE - The particles are useful in the field of non-destructive testing. ADVANTAGE - The particles exhibits excellent magnetic properties and suspendability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene-loaded ferroferric oxide magnetic powder particles obtained by the above method, where the nano-sized ferroferric oxide is supported on the graphene surface in the form of particles.