SmFeO3@(x)polyaniline composites with porous structure for efficient microwave-absorbing application

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

“…Excitingly, when this MAM was damaged, the healing agents within MCs were released autonomously to react with the curing agent in the matrix to fill the crack. As demonstrated, the self-healing strength of materials containing 9% MCs reached a maximum value of 33 Specifically, the maximum scratch depth within 30 days was studied by this team. The depth and width of the scratch gradually decreased during the first 14 days due to the crackfilled ability of BTA@NiCo 2 O 4 that released BTA to form a protective membrane to prevent the cracks from widening (Figure 13a).…”

“…32 Under the action of an external electric field, the movement of charged particles would produce a weak induction current, and then enable the joule effect when they flow through the medium, generating the medium heat and loss of electric energy, which is the conduction loss. 33 The conduction loss is directly proportional to the conductivity (σ). Specifically, the high conductivity produces a large induced current, which generates more heat in turn, leading to the greater conduction loss.…”

“…Dielectric loss is the phenomenon of dielectric heating under the action of electric field, which includes the conduction loss and polarization relaxation loss (Figure b) . Under the action of an external electric field, the movement of charged particles would produce a weak induction current, and then enable the joule effect when they flow through the medium, generating the medium heat and loss of electric energy, which is the conduction loss . The conduction loss is directly proportional to the conductivity (σ).…”

“…The entering microwave should be greatly attenuated through two mechanisms of dielectric loss and magnetic loss (Figure 2b). 33 In general, the greater the loss, the stronger the attenuation ability becomes. In most cases, wave dissipation performance of the materials is the result of a combination of dielectric loss and magnetic loss.…”

“…Meanwhile, unattenuated microwaves go back to free space, forming the transmitted waves. , Excellent MAMs should enable incoming microwaves into material as much as possible, rather than being reflected by the surface, because the reflected microwave will produce secondary pollution. The entering microwave should be greatly attenuated through two mechanisms of dielectric loss and magnetic loss (Figure b) . In general, the greater the loss, the stronger the attenuation ability becomes.…”