What are the classifications of absorbing materials?

1. Magnetic loss. This type of absorption mechanism is a type of magnetic loss related to the dynamic magnetization process of ferromagnetic media. This type of loss can be refined into: hysteresis loss, gyromagnetic eddy current, damping loss and magnetic aftereffect, etc. Its main source is the magnetic domain turning, magnetic domain wall displacement and natural resonance of the magnetic domain similar to the hysteresis mechanism. In addition, the latest microwave loss mechanism of nanomaterials is a hot spot in the analysis of absorbing materials today.

2. Dielectric loss, which is a kind of dielectric loss absorption mechanism related to electrodes, that is, the electromagnetic energy is converted into thermal energy dissipation through the "friction" effect produced by repeated polarization of the medium. The dielectric polarization process includes: electron cloud displacement polarization, polar dielectric moment turning polarization, electric ferrite domain turning polarization, and wall displacement.

3. Resistive loss, this kind of absorption mechanism and the resistive loss related to the conductivity of the material, that is, the greater the conductivity, the greater the macroscopic current caused by carriers (including the current caused by electric field changes and the eddy current caused by magnetic field changes) , So as to facilitate the conversion of electromagnetic energy into thermal energy.

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