▎ 摘　　要

NOVELTY - Preparing high frequency soft magnetic ferric oxide/tin dioxide/graphene composite wave absorbing material for communication device where soluble iron salt and tin salt used as raw material, using iron salt and tin salt to hydrolyze and calcine in the graphene dispersion liquid, self- assembling into ferric oxide/stannic oxide graphene composite material involves preparing oxidation graphene dispersion ultrasonically dispersing the concentration of 3 mg/mL prepared by the hummer's method graphene then adding distilled water, adjusting the pH value of the solution to 3-5 by diluted hydrochloric acid, heating the magnetic stirring, transferring the solution to polytetrafluoroethylene to reaction kettle and preserve heat, preparing iron salt/tin salt/graphene intermediate state composite material by mixing the soluble iron salt/tin salt precursor and graphene dispersion liquid according to mass ratio of 1:40-60:40-60. USE - Method for preparing high frequency soft magnetic ferric oxide/tin dioxide/graphene composite wave absorbing material for communication device. ADVANTAGE - The method has a three-dimensional structure configuration and flexibility of graphene, has a high specific area and good three-dimensional hole structure channel, the interface polarization ability increases by the synergistic effect of magnetic loss and dielectric loss, exhibits good high-frequency electromagnetic wave absorption performance. DETAILED DESCRIPTION - Preparing high frequency soft magnetic ferric oxide/tin dioxide/graphene composite wave absorbing material for communication device where soluble iron salt and tin salt used as raw material, using iron salt and tin salt to hydrolyze and calcine in the graphene dispersion liquid, self- assembling into ferric oxide/stannic oxide graphene composite material, involves preparing oxidation graphene dispersion ultrasonically dispersing the concentration of 3 mg/mL prepared by the hummer's method graphene then adding distilled water, adjusting the pH value of the solution to 3-5 by diluted hydrochloric acid, heating the magnetic stirring, transferring the solution to polytetrafluoroethylene to reaction kettle and preserve heat, preparing iron salt/tin salt/graphene intermediate state composite material by mixing the soluble iron salt/tin salt precursor and graphene dispersion liquid according to mass ratio of 1:40-60:40-60; continuously and fully stirring to obtain stable brown suspension, the brown suspension is sealed in polytetrafluoroethylene reaction, kettle reaction for 12 hours at 160-200degrees Celsius, the process iron salt and tin salt is further hydrolyzed into iron yellow FeOOH and tin salt SnOOH precursor particles, and the anchor is set on the surface D graphene obtaining the iron salt/tin salt graphene intermediate state composite material; preparing ferric oxide/stannic oxide/graphene by fully filtering and washing the obtained iron salt/tin salt graphene intermediate state composite material, putting in a tubular furnace under the protection of nitrogen, calcining for 2 hours at 500-700 degrees Celsius, the process iron yellow FeOOH precursor particles change the phase change self-assembly into ferroferric oxide particles, the tin salt SnOOH precursor particles change the phase change self- assembly into tin dioxide particles, the oxidation is graphene to be reduction oxidation graphene, finally obtaining the ferric oxide/stannic oxide/graphene.