▎ 摘　　要

NOVELTY - A lightweight magnetic iron oxide-based composite wave absorbing material comprises 30-50 pts. wt. nanometer ferroferric oxide, 3 pts. wt. silicon dioxide with average particle diameter of less than or equal to 5 mu m, 3 pts. wt. boron trioxide with average particle diameter of less than or equal to 5 mu m, 5 pts. wt. aluminum oxide with average particle diameter of less than or equal to 5 mu m, and 15 pts. wt. graphite powder. Micron-sized ferroferric oxide hollow microbead is prepared from nanometer ferroferric oxide. Graphene oxide colloid is prepared from graphite powder using Hummers' method. The prepared ferroferric oxide hollow microbead and graphene oxide colloid is subjected to ball milling and hot pressing sintering to obtain magnetic iron oxide-based composite wave absorbing material. USE - Magnetic iron oxide-based composite wave absorbing material. ADVANTAGE - The composite wave absorbing material has wide absorbing frequency band, and solves problem with single system ferroferric oxide absorbing material having large density of 4.9-5.3 g/cm3, narrow absorption bands being at 8-12 GHz or 8-18 GHz, and no absorption effect in low frequency range of 2-8 GHz.