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Adjustable iron‐containing SiBCN ceramics with high‐temperature microwave absorption and anti‐oxidation properties
Author(s) -
Song Yan,
Jin Shuo,
Hu Ketao,
Du Yuzhang,
Liang Jin,
Kong Jie
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17879
Subject(s) - ceramic , materials science , reflection loss , microwave , permittivity , absorption (acoustics) , dielectric , dielectric loss , attenuation coefficient , temperature coefficient , composite material , boron , optoelectronics , composite number , optics , chemistry , physics , organic chemistry , quantum mechanics
Quaternary siliconboron carbonitride (SiBCN) ceramics show excellent high‐temperature stability and oxidation resistance, indicating great potential as high‐temperature electromagnetic (EM) wave absorbing materials. In this contribution, an efficient and facile method was developed to prepare bulk iron‐containing SiBCN (Fe–SiBCN) ceramics with remarkable EM wave absorption at high temperature by pyrolyzing boron and iron containing precursors (PSZV‐B–Fe). The introduction of boron and iron not only improves the high‐temperature stability but also influences the complex permittivity and EM wave absorption. The minimum reflection coefficient (RC min ) is −61.05 dB, and the effective bandwidth absorption (EAB) is 3.35 GHz (9.05–12.4 GHz). The RC min will be decreased to −52.3 dB at 600°C as well as the EAB covers more than 67% of the X band (2.8 GHz). The high‐temperature stable Fe–SiBCN ceramics with adjustable dielectric properties can be utilized as high‐performance EM wave‐absorbing materials in high‐temperature and harsh environments.