Magnetic properties and microwave absorption properties of chlorosulfonated polyethylene matrices containing graphite and carbonyl-iron powder

► CIP-GRP/CSM composite microwave absorbers with different thickness were prepared. ► The mixture microwave absorbent of carbonyl-iron powder and graphite was designed. ► Measurements and discussions of the εr and the μr of the mixture microwave absorbent were done. ► The bandwidth with RL under −10 dB reached 8.96 GHz and the minimum RL was −33.19 dB.