Electromagnetic wave absorption mechanism for nanocomposites of holmium orthoferrite decorated poly(3,4-ethylenedioxythiophene -5-cyanoindole)

Fabrication of ZnS/g‐C3N4/Gypsum Plaster Nanocomposite Toward Refining Electromagnetic Pollution and Saving Energy

“…The microwave absorption of samples was investigated by transmission line theory. [ 83–87 ] As indicated, the strong maximum RL of ZnS/gypsum plaster is 140.15 dB at 13.20 GHz, gaining efficient bandwidth (RL > 10 dB) as wide as 5.10 GHz with 1.90 mm in thickness. Interestingly, the ZnS/DGCN 75/gypsum plaster attained a marvelous efficient bandwidth of 6.82 GHz (RL > 10 dB) and a maximum RL of 53.13 dB at 14.10 GHz with the same thickness.…”

Preparation of MXene/BN Composites with Adjustable Microwave Absorption Performance

“…Therefore, based on the above discussion, it can be inferred that α plays a crucial role in determining the effective absorption capabilities in MXene/BN composites. The absorption mechanisms in as-prepared MXene/BN-xyz composites can be elucidated as follows: (i) the conductive loss in MXene serves as an effective mechanism for attenuating electromagnetic waves, as the interconnected network of conductors converts electromagnetic fields into electric currents and subsequently dissipates them as thermal energy [53,54] (as shown in Figure 7a); (ii) in Figure 7b, the numerous complex MXene-BN interfaces function as capacitors, capable of accumulating charges in response to electromagnetic fields, thereby inducing interface polarization; (iii) the presence of BN nanosheets hinders the formation of conductive networks in MXene, thereby reducing the properties of the absorber, specifically minimizing conductive losses while significantly increasing conductivity [55,56]; (iv) by incorporating BN nanosheets onto MXene, the conductive loss is mitigated, leading to a juxtaposition of reduced conductive loss and increased interface polarization loss, as depicted in Figure 7c. The absorption mechanisms in as-prepared MXene/BN-xyz composites can be elucidated as follows: (i) the conductive loss in MXene serves as an effective mechanism for attenuating electromagnetic waves, as the interconnected network of conductors converts electromagnetic fields into electric currents and subsequently dissipates them as thermal energy [53,54] (as shown in Figure 7a); (ii) in Figure 7b, the numerous complex MXene-BN interfaces function as capacitors, capable of accumulating charges in response to electromagnetic fields, thereby inducing interface polarization; (iii) the presence of BN nanosheets hinders the formation of conductive networks in MXene, thereby reducing the properties of the absorber, specifically minimizing conductive losses while significantly increasing conductivity [55,56]; (iv) by incorporating BN nanosheets onto MXene, the conductive loss is mitigated, leading to a juxtaposition of reduced conductive loss and increased interface polarization loss, as depicted in Figure 7c.…”

“…A series of MXene/BN composites have been successfully synthesized and utilized for the first time in microwave absorption applications. The materials were characterized through XRD, XPS, SEM and TEM analysis, while the MAP was evaluated using network The absorption mechanisms in as-prepared MXene/BN-xyz composites can be elucidated as follows: (i) the conductive loss in MXene serves as an effective mechanism for attenuating electromagnetic waves, as the interconnected network of conductors converts electromagnetic fields into electric currents and subsequently dissipates them as thermal energy [53,54] (as shown in Figure 7a); (ii) in Figure 7b, the numerous complex MXene-BN interfaces function as capacitors, capable of accumulating charges in response to electromagnetic fields, thereby inducing interface polarization; (iii) the presence of BN nanosheets hinders the formation of conductive networks in MXene, thereby reducing the properties of the absorber, specifically minimizing conductive losses while significantly increasing conductivity [55,56]; (iv) by incorporating BN nanosheets onto MXene, the conductive loss is mitigated, leading to a juxtaposition of reduced conductive loss and increased interface polarization loss, as depicted in Figure 7c.…”

Mechanical and Electromagnetic Wave Absorption Performance of Carbonyl Iron Powder-Modified Nonwoven Materials

“…Another EOG/CIP composite with 0.5 wt.% EOG and 72 wt.% CIP and a thickness of 1.33 mm reached an RL min of −69.27 dB at 15 GHz with an EAB of 6.47 GHz. Furthermore, CIP and other nanomaterials have been incorporated into special three-dimensional structures, such as gradient structures, honeycomb structures, topological structures, foam structures, multilayer structures, biomimetic structures, and vertically oriented structures, to enhance electromagnetic absorption performance [16][17][18][19][20][21][22][23][24][25][26][27][28]. Honeycomb structure absorbing composites are a significant research focus in this regard.…”