@article{Qian2024, 
author = {Junjie Qian and Dandan Ma and Xiaoling Zhou and Huoming Liao and Qingliang Shan and Shaohua Wang and Yongqing Wang and Xiaojun Zeng},
title = {Synthesis of SiOC@C ceramic nanospheres with tunable electromagnetic wave absorption performance},
year = {2024},
journal = {Journal of Advanced Ceramics},
volume = {13},
number = {9},
pages = {1394-1408},
keywords = {polymer-derived ceramics (PDCs), free carbon, SiOC ceramic nanospheres, electromagnetic wave absorption performance},
url = {https://www.sciopen.com/article/10.26599/JAC.2024.9220944},
doi = {10.26599/JAC.2024.9220944},
abstract = {SiOC-based ceramics are considered promising electromagnetic wave-absorbing materials because of their lightweight, high-temperature resistance, and heat insulation properties. Herein, SiOC@C ceramic nanospheres were prepared using a liquid-phase method combined with a polymer-derived ceramic (PDC) method, followed by heat treatment in N2 and Ar atmospheres at different temperatures. The morphology, microstructure, phase composition, and electromagnetic wave absorption performance of the SiOC@C ceramic nanospheres were investigated in detail. The SiOC@C ceramic nanospheres obtained in the Ar atmosphere showed a minimum reflection loss (RLmin) of −67.03 dB, whereas the SiOC@C ceramic nanospheres obtained in the N2 atmosphere exhibited an RLmin value of −63.76 dB. The outstanding electromagnetic wave absorption performance of the SiOC@C ceramic nanospheres was attributed to the synergistic effect between conductive loss, interfacial/defect polarization loss, multiple reflections, and scattering. Therefore, this research provides valuable insights into the design and fabrication of SiOC ceramic-based electromagnetic wave absorbers.}
}