【摘要】 研究了有机硅树脂/石英纤维复合材料的拉伸性能、耐高温性能和介电性能。研究结果表明,纤维预处理方式对纤维和复合材料力学性能有较大影响。采用甲苯浸泡,继而350℃高温加热400s可在获得较好纤维强度的前提下除去浸润剂。复合材料经热处理后仍能保持很好的力学强度和介电性能,550℃处理后,拉伸强度达到了360MPa以上,介电常数仍在3.30以下,满足导弹天线罩用复合材要求。更多还原

【Abstract】 The tensile property,high-temperature resistance and dielectric property of silicone resin/silica fiber composites were studied.Results showed that pretreatment methods of fiber had important influence on the tensile property of fiber and composites.Agent on the surface of fiber could be removed completely by way of dipping in tol- uene and then heating at 350℃for 400 seconds,meanwhile keeping an acceptable tensile strength of silica fiber. The composites could keep excellent mechanical and dielectric properties after high temperature heat treatment.The tensile strength of the composites was over 360MPa and the dielectric constant was below 3.30,which met the re- quirements of antenna mask.更多还原