Electromagnetic synergistic optimization of conductive NiCo-MOF with excellent electromagnetic wave absorption properties

Abstract

The rapid development of information technology has given rise to an urgent demand for high-efficiency electromagnetic wave absorbing materials. It is a challenge for wave-absorbing materials that address the electro-magnetic synergistic effect to develop high-efficiency electromagnetic wave (EMW) materials that can not only reduce the electromagnetic interference generated by electronic devices in daily use but also exhibit a certain degree of stealth in the military field. To study and prepare high-efficiency EMW materials, this paper uses the solvothermal method to prepare NiCo-HHTP, and systematically investigates their electromagnetic wave absorption performance and absorption mechanism. The research shows that the composite material NCH1 obtained in this experiment achieves a minimum reflection loss (RL_min) value of -56.99 dB and an effective absorption bandwidth of 6.51 GHz at a relatively thin matching thickness of 2.9 mm. The polarization effect endows it with good conductive loss, and the magnetic central metal gives it a certain degree of magnetic loss. The synergistic effect of dielectric loss and magnetic loss makes the material exhibit a good wave-absorbing effect. This simple and efficient preparation method provides a new strategy for the preparation and application of metal-organic framework materials in EMW absorption.

Keywords

Electromagnetic wave absorption / HHTP / dielectric loss / magnetic loss / dielectric-magnetic loss synergistic effect

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