Significant promotion of porous architecture and magnetic Fe₃O₄ NPs inside honeycomb-like carbonaceous composites for enhanced microwave absorption.

7b , the ε ′′ values of WC-600 displayed a decreasing trend from 12 GHz to 18 GHz, which implies that it might exhibit poor microwave absorption in the Ku band (12–18 GHz). 42 For WPC-600 and Fe 3 O 4 /WPC-600, the values of ε ′′ were similar to the ε ′ values, which implies that the dissipation ability of these samples was coordinated with their ability to store electrical energy, which is beneficial for absorption performance.

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