Jiang, L.; Qin, G.; Cui, P.; Wang, G.; Zhou, X. A Novel Nano-Laminated GdB2C2 with Excellent Electromagnetic Wave Absorption Performance and Ultra-High Temperature Thermostability. Preprints2024, 2024050725. https://doi.org/10.20944/preprints202405.0725.v1
APA Style
Jiang, L., Qin, G., Cui, P., Wang, G., & Zhou, X. (2024). A Novel Nano-Laminated GdB2C2 with Excellent Electromagnetic Wave Absorption Performance and Ultra-High Temperature Thermostability. Preprints. https://doi.org/10.20944/preprints202405.0725.v1
Chicago/Turabian Style
Jiang, L., Guoqing Wang and Xiaobing Zhou. 2024 "A Novel Nano-Laminated GdB2C2 with Excellent Electromagnetic Wave Absorption Performance and Ultra-High Temperature Thermostability" Preprints. https://doi.org/10.20944/preprints202405.0725.v1
Abstract
A novel nano-laminated GdB2C2 material was successfully synthesized using GdH2, B4C, and C via an in-situ solid state reaction approach for the first time. The formation mechanism of GdB2C2 was revealed based on the microstructure and phase evolution investigation. A purity of 96.4 wt. % GdB2C2 was obtained at a low temperature of 1500 ℃, while a near full pure GdB2C2 can be obtained at a temperature over 1700 ℃. The as-obtained GdB2C2 presented excellent thermal stability at high temperature of 2100 ℃ in Ar atmosphere due to the stable frame work formed by the high covalent four-members and eight-members B-C rings in GdB2C2. The minimum reflection loss value (RLmin) of -47.01 dB with an effective absorption bandwidth (EAB) of 1.76 GHz at a thickness of 3.44 mm was obtained for the GdB2C2 synthesized at 1500 ℃. The possible EMWA mechanism could be ascribed to the nano-laminated structure and appropriate electrical conductivity, which facilitated to the good impedance matching, remarkable conduction loss, interfacial polarization as well as multiple interface reflection and scattering. The as-obtained GdB2C2, with excellent EMWA performance as well as remarkable ultra-high temperature thermal stability, could be a promising candidate for the EMWA materials applications in extreme ultra-high temperatures.
Keywords
GdB2C2; ternary layered materials; electromagnetic wave absorption; ultra-high temperature ceramic
Subject
Chemistry and Materials Science, Ceramics and Composites
Copyright:
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