High-temperature dielectric and electromagnetic interference shielding properties of SiCf/SiC composites using Ti3SiC2 as inert filler

Dependences of microstructure on electromagnetic interference shielding properties of nano-layered Ti3AlC2 ceramics

“…TAC-D ceramic with the largest grain size shows the highest SE T over 40 dB at the whole Ku-band, which means over 99.99% of the incident radiation could be effectively blocked with only 0.01% transmission. The room-temperature EMI SE T of TAC-D ceramic is higher than most ceramic-based EMI shielding composites containing conductive particles or carbon nano-fillers 3–6,8,27 , while the preparation of Ti 3 AlC 2 ceramics is much less complicated. Moreover, the high SE T of TAC-D ceramic is almost independent of the frequency.…”

“…Ceramic-based EMI shielding materials have been identified as novel electromagnetic shielding options in the past few years owning to their promising applications as light-weight structural EMI shielding components in areas of aircraft and aerospace 3–6 . Compared to traditional metal- and carbon-based EMI shielding materials, ceramic composites exhibit the great advantage of being mechanically stiff and thermo-stable, which could guarantee their functionality at harsh environments 6 .…”

Mullite‐hexagonal di‐phase multiferroic behavior with enhanced ferromagnetism of (1−x)Bi2Fe4O9−xBaFe12O19 composites

“…In brief, it can be said that the high ϵ ′ in the low‐frequency region is a characteristic of a normal dielectric material. As the frequency increases, dipoles begin to lag behind the field and ϵ ′ slightly decreases .…”

Boron carbide composites with highly aligned graphene nanoplatelets: light-weight and efficient electromagnetic interference shielding materials at high temperatures

“…With further increase of GNPs, SE T increased remarkably and a maximum SE T close to 40 dB was obtained in GNP/B 4 C composite with only 2 vol% GNPs which is almost the lowest amount of nano-llers required to achieve such a high EMI SE T in reported ceramic-or even polymer-based composites. [1][2][3]7,20 Correspondingly, 99.99% of the incident EMI energy could be effectively shielded at room-temperature for GNP/B 4 C composite with 2 vol% GNPs. The overall EMI SE T could be further divided into three parts which correspond to reection (SE R ), absorption (SE A ) and the multiple reections (SE M ) respectively.…”

“…[4][5][6][7] One of the biggest obstacles for common ceramics as effective structural EMI shielding materials is the relatively low shielding effectiveness (SE) which had been generally ascribed to their poor electrical conductivity. 2,4,8 Similar to polymer composites, [9][10][11][12] the electrical conductivity and EMI SE of ceramics could be signicantly enhanced by incorporating highly conductive nano-llers such as nano-layered Ti 3 SiC 2 , 7,13 carbon ber (C f ), 14,15 carbon nanotube (CNT) 16,17 and graphene. [1][2][3] Specially, it is worth noting that composites containing two-dimensional graphene could achieve considerably high EMI SE at a much lower ller content compared to onedimensional or three-dimensional nano-llers, 18,19 and the high SE dominantly arose from the high absorption loss.…”