▎ 摘　　要

NOVELTY - Multi-stage porous ceramic foam microcrystals comprises ceramic foam and porous graphene microspheres attached to the pores of the ceramic foam. The porous graphene microspheres contain micropores, mesopores and macropores multi-level holes, where the pore structure of the multistage hole foam ceramic comprises porous graphene microspheres. The polyvinyl alcohol is subjected to freezing and thawing to form microcrystals. USE - Multi-stage porous ceramic foam microcrystals. ADVANTAGE - The multi-stage porous ceramic foam microcrystals has mechanical property, high adsorption performance and high porosity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing multi-stage porous ceramic foam microcrystals, which comprises: (A) adding ceramic powder hydrophobizing modifier and polyvinyl alcohol to the ceramic slurry for adjusting the pH value to weak acidity, then subjecting to high-speed mechanical stirring to obtain particle stable foam; (B) stabilizing the particle stable foam immediately under low temperature curing for 12-24 hours, then removing, thawing at 0-10 degrees C for 3-12 hours, to obtain cure ceramic body; (C) mixing graphene oxide solution with polyvinyl alcohol solution then adding liquid nitrogen dropwise for solidification to obtain crystalline microspheres and thawing at 0-10 degrees C for 3-12 hours to obtain graphite oxide olefin microspheres; (D) adding graphite oxide olefin microspheres with crosslinking agent solution and mixing uniformly with the addition of cure ceramic body and subjecting to vacuum freeze-drying to obtain solution containing oxidized graphene microspheres foam ceramic body; and (E) subjecting solution containing oxidized graphene microspheres foam ceramic body to sintering at 1400-1900 degrees C and cooling to obtain desired product.