Wang Yan, Sun Xin, Xiao Zhihe, Gu Jian, Dong Qinyi, Yi Shuhang, Jin Junyang
National Key Laboratory of Scattering and Radiation, Beijing 100854, China.
Beijing Institute of Environmental Features, Beijing 100854, China.
Nanomaterials (Basel). 2024 Dec 18;14(24):2033. doi: 10.3390/nano14242033.
TiC provides a promising potential for high-temperature microwave absorbers due to its unique combination of thermal stability, high electrical conductivity, and robust structural integrity. C@TiC/SiO composites were successfully fabricated using a simple blending and cold-pressing method. The effects of C@TiC's absorbent content and temperature on the dielectric and microwave absorption properties of C@TiC/SiO composites were investigated. The addition of C@TiC from 10 wt.% to 30 wt.% not only endows the composites with a higher dielectric constant and dielectric loss, but also with a greater high-temperature stability in terms of dielectric and microwave absorption properties. The composite with 30 wt.%C@TiC demonstrates a strong microwave absorption capability with a minimum reflection loss () of -55.87 dB, -48.49 dB, and -40.36 dB at room temperature, 50 °C, and 100 °C, respectively; the 50 wt.%C@TiC composite exhibits an enhanced high-temperature microwave absorption performance with an of -16.13 dB and -15.72 dB at 200 °C and 300 °C, respectively. This study demonstrates that the TiC-based absorbers present an innovative solution for high-temperature microwave absorption, providing stability, versatility, and adaptability in extreme operational environments.
由于TiC具有热稳定性、高导电性和坚固的结构完整性等独特组合，它在高温微波吸收体方面具有广阔的应用潜力。采用简单的共混和冷压方法成功制备了C@TiC/SiO复合材料。研究了C@TiC吸收剂含量和温度对C@TiC/SiO复合材料介电性能和微波吸收性能的影响。添加10 wt.%至30 wt.%的C@TiC不仅使复合材料具有更高的介电常数和介电损耗，而且在介电和微波吸收性能方面具有更高的高温稳定性。含30 wt.%C@TiC的复合材料表现出很强的微波吸收能力，在室温、50℃和100℃下的最小反射损耗（）分别为-55.87 dB、-48.49 dB和-40.36 dB；含50 wt.%C@TiC 的复合材料在200℃和300℃下的反射损耗分别为-16.13 dB和-15.72 dB，高温微波吸收性能增强。本研究表明，基于TiC的吸收体为高温微波吸收提供了一种创新解决方案，在极端工作环境中具有稳定性、通用性和适应性。
