Carbon foam reinforced SiBCN ceramic aerogel with multifunctional performances

• DOI: 10.1111/jace.20536
• Publication Date: 2025-03-31T15:07:40Z
• Authors: Wenxia Zhu; Xiaohui Xia; Dong Su; Huiming Ji
• Keywords: Carbon fibers

Abstract Silicon boron carbonitride (SiBCN) ceramic aerogels have gained great interests for their excellent high‐temperature stability, thermal insulation, and low density, capable of achieving multifunctional applications. Here, a carbon foam reinforced SiBCN aerogel (CF/SiBCN) was prepared using polyborosilazane (PBSZ) as precursor melamine‐derived (CF) skeleton via hydrothermal assembly, freeze‒drying, pyrolysis. The CF/SiBCN exhibits density (0.13‒0.58 g cm −3 ) high porosity (68.1%‒91.9%) by adjusting PBSZ content in cyclohexane solution. Benefiting from highly porous structure, the realize conductivity 0.04‒0.05 W m −1 K good structural stability after treatment Ar, showing potential application insulation field under environments. Moreover, 1400°C‐carbonized CF conductive network significantly enhances electrical up to 320 S , thus attaining electromagnetic interference SE Total value 33.7 dB well notable Joule heating (95.6°C at 4.0 V) performance. Consequently, it is an effective approach develop novel composites expanding usage fields.