Phase compositions and microwave dielectric characteristics of xMg2B2O5-(1-x)Ba3V2O8 (0.5 ≤x ≤ 0.7) ceramics

Fang, Zhen; Pang, Li‐Xia; Zhou, Di; Wang, Xiaolong; Ren, Sen; Liu, Weiguo

doi:10.1016/j.jallcom.2022.167662

Cited by 10 publications

(1 citation statement)

References 30 publications

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“…The increase of 𝛼 values indicates that the attenuation and dissipation capacities of Co-C for electromagnetic waves are en-hanced, allowing Co-C efficiently to convert more incident electromagnetic waves into thermal energy. [61][62][63] However, when the pyrolysis temperature reaches 900 °C, the 𝛼 value of Co-C further increases but the microwave absorption performance decreases. It is attributed to the poor impedance matching between Co-C and free space, making it difficult for electromagnetic waves to enter the interior of Co-C for attenuation and dissipation.…”

Section: Electromagnetic Parameters Of Co-c@cmentioning

confidence: 99%

Heterostructured BN@Co‐C@C Endowing Polyester Composites Excellent Thermal Conductivity and Microwave Absorption at C Band

Zhong,

He,

Zhang

et al. 2024

Adv Funct Materials

193

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The trends of miniaturization, lightweight, and high integration in electronics have brought serious issues in heat dissipation and electromagnetic compatibility and also limited the simultaneous use of thermally conductive and microwave absorption materials. Therefore, it is imperative to design materials that possess those dual functions. In this work, one‐pot method is used to anchor zeolitic imidazolate framework ZIF‐67 coated with polydopamine (PDA) on boron nitride (BN) to obtain BN@ZIF‐67@PDA. The pyrolysis product BN@Co‐C@C is used as heterostructured thermally conductive/microwave absorption fillers and blended with polyethylene terephthalate (PET) to prepare BN@Co‐C@C/PET composites. When the mass ratio of BN to ZIF‐67@PDA is 7.5:1 and the mass fraction of BN7.5@Co‐C@C is 45 wt%, the BN7.5@Co‐C@C/PET composites exhibit excellent thermal conductivities and microwave absorption performances. The thermal conductivity coefficient is 5.37 W m−1 K−1, which is 35.8 times higher than that of PET (0.15 W m−1 K−1), and also higher than that of 45 wt% (BN7.5/Co‐C@C)/PET composites (4.03 W m−1 K−1) prepared by directly mixing. The minimum reflection loss of 45 wt% BN7.5@Co‐C@C/PET composites are −63.1 dB at 4.72 GHz, and the corresponding effective absorption bandwidth is 1.28 GHz (4.08–5.36 GHz), achieving excellent microwave absorption performance at C band.

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Section: Electromagnetic Parameters Of Co-c@cmentioning

confidence: 99%