光固化 3D 打印前驱体转化 SiCN 陶瓷吸波材料

With the rapid advancement of modern electronic and communication technologies, there is an increasing demand for high-performance electromagnetic wave(EMW) absorbing materials. Materials that combine lightweight properties, high-temperature resistance, and broadband absorption capabilities have become a growing research hotspot. This work proposes a novel strategy for fabricating ceramic metamaterials based on ultraviolet(UV)-curable hyperbranched polysilazane(UV-PSN) precursors. By introducing photosensitive groups into the ceramic precursor monomers and utilizing digital light processing(DLP) 3D printing technology, the synergistic regulation of microstructure and macroscopic morphology is successfully achieved. The fabricated SiCN ceramic metamaterials not only exhibit high-temperature resistance up to 1400 ℃ and tunable dielectric properties but also demonstrate excellent manufacturing precision. In addition, the unique hollow structure design significantly enhances the impedance matching performance of the overall SiCN ceramic material, achieving an effective absorption bandwidth of 3.4 GHz in the X-band. Furthermore, the overall weight of the SiCN ceramic metamaterials is reduced by 79.6% compared to solid structures. This study provides new design concepts and technical pathways for developing multifunctional EMW absorbing materials suitable for extreme environments.