▎ 摘　　要

NOVELTY - Preparing frequency-adjustable SnO2/Sn/rGO composite wave absorbing material, involves dissolving tin chloride dihydrate (SnCl2.2H2O) in absolute ethanol and stirring well, and placing in deionized water and stirred for 1-2 hours, until completely dissolved to above solution, added tetraethyl orthosilicate (TEOS) and stirred well, after sealing and aging, and drying. The sample is immersed in sodium hydroxide solution for stirring. The solution is washed and filtered, dried, ground, and calcined to obtain nano-scale tin oxide (SnO2). The C1(SnO2/rGO) sample is obtained by mixing graphine oxide (GO), nanoscale tin oxide (SnO2), and KH-550 (3-aminopropyltriethoxysilane) in deionized water. The composite absorbing materials with different phase structures are obtained through different calcination temperatures in argon atmosphere, respectively post-generated C2(SnO2/rGO), C3(SnO2/Sn/rGO), C4(Sn/rGO) and C5(Sn/rGO) composites. USE - Method for preparing frequency-adjustable SnO2/Sn/rGO composite wave absorbing material. ADVANTAGE - The composite material has adjustable absorbing properties when the thickness of the absorbing ring is 3 mm. The relaxation polarization loss is related to intrinsic carrier concentration and carrier migration, and plays a key role in microwave loss and frequency modulation mechanisms. When the interface polarization range is (0 .14-2.27), the composite has better microwave loss and low frequency absorption