▎ 摘　　要

NOVELTY - Composite fiber wave-absorbing material comprises 40-60 pts. wt. curing agent, 2-10 pts. wt. epoxy resin matrix, 10-30 pts. wt. graphene fiber, 10-20 pts. wt. active carbon fiber, 5-15 pts. wt. barium ferrite microwave absorbent and 10-20 pts. wt. graphite. The graphite fiber and active carbon fiber are fiber bundle structure. The graphite fiber and active carbon fiber beam are vertically alternately dispersed in the epoxy resin to form the array. The distance is not more than 10 mm. USE - Composite fiber wave-absorbing material. ADVANTAGE - The composite fiber wave-absorbing material has a synergetic effect with improved absorption performance of the material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing barium ferrite, which involves: (A) mixing barium nitrate, ferric nitrate and citric acid with mol ratio of 1:12:6-26 to form aqueous solution; (B) adding ammonia water into the solution until the pH of the solution becomes 4-7; (C) heating the mixture on water bath at 85-95 degrees C for 1-3 hours; (D) drying the reactant to obtain gel; and (E) drying the gel at 550-750 degrees C for 1-3 hours.