Si₂N₂O composites were achieved via direct ink writing technique and pressureless sintering. The design and optimization of inks and the effect of mass ratio of Si₃N₄ and SiO₂ on the phase composition, microstructure, mechanical properties and dielectric properties of composites were systematically investigated. The inks exhibit superior stability and printability. Increasing SiO₂ content facilitated densification and enhancement of mechanical property. The generation of β-Si₃N₄ and Si₂N₂O and the nucleation of cristobalite were restrained by high content SiO₂. The ceramic composites with the flexural strengths from 74.1MPa to 104.9MPa and low dielectric constant (≤4.68) were fabricated. This strategy provides a systematic reference for synthesis of high-performance porous Si₂N₂O composites based on the DIW.

通过直接墨水书写技术和无压烧结获得了Si ₂ N ₂ O复合材料。系统地研究了油墨的设计和优化以及Si ₃ N ₄和SiO ₂的质量比对复合材料的相组成，微观结构，力学性能和介电性能的影响。油墨表现出优异的稳定性和可印刷性。SiO ₂含量的增加促进了致密化并提高了机械性能。的生成β型Si ₃ Ñ ₄和Si ₂ Ñ ₂ O和方英石的成核是由高含量限制的SiO ₂。制备了抗弯强度为74.1MPa至104.9MPa，介电常数低（≤4.68）的陶瓷复合材料。该策略为基于DIW的高性能多孔Si ₂ N ₂ O复合材料的合成提供了系统的参考。