▎ 摘　　要

NOVELTY - The device has a baffle (7) which is opened and closed by a baffle switch (16). The baffle switch is arranged at a left side where a reaction chamber (1) and a washing and drying chamber (2) are connected. A temperature adjustment button (13) is arranged on a lower left outer wall of the washing and drying chamber. The temperature adjustment button is electrically connected to a heat pipe (12). A bottom of a right outer wall of the washing and drying chamber has a small hole. The small hole communicates with a cavity, and blocked by a water stop plug (10). USE - Preparation device for graphene composite material. ADVANTAGE - The preparation device has simple operation and low cost. The iron-nickel alloy graphene composite material obtained by the thermal decomposition method has good wave-absorbing performance. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the preparation device for graphene composite material. Reaction chamber (1) Washing and drying chamber (2) Baffle (7) Water stop plug (10) Heat pipe (12) Temperature adjustment button (13) Baffle switch (16)