以低黏度、润湿性好、陶瓷产率高的全氢聚硅氮烷为陶瓷先驱体,通过多次浸渍-固化-裂解工艺制备了高性能三维石英织物增强氮化硅复合材料.随着裂解温度的提高(从T1,T2到T3),复合材料密度逐渐增加,而弯曲强度先增后减.在裂解温度T2时,先驱体具有较好的陶瓷化程度,所制备的复合材料弯曲强度高达144.9MPa,且介电性能优良.这些高性能源于较小的石英纤维损伤,良好的纤维/基体界面微结构和高纯度致密氮化硅基体. A high-performance three-dimensional quartz fabric reinforced silicon nitride composite material was prepared by multiple impregnation-solidification-cracking processes using perhydropolysilazane as a ceramic precursor with low viscosity, good wettability and high ceramic yield. At T1, T2 and T3, the density of composites increases, but the flexural strength increases first and then decreases. At T2, the precursors have a good degree of ceramization. The flexural strength Up to 144.9MPa, and excellent dielectric properties of these high performance derived from the smaller quartz fiber damage, good fiber / matrix interface microstructure and high purity dense silicon nitride matrix.