通过熔融纺丝制备出三折叶形聚碳硅烷原纤维,然后将原纤维不熔化及高温烧成得到平均当量直径为27μm、拉伸强度为1.7GPa的三折叶形碳化硅纤维.以环氧树脂为粘结剂,分别研究了有规排列长纤维及无规排列短切纤维在复合材料中的电磁性能,在X波段,有序排列长纤维的介电常数实部ε'为6.52~6.88,虚部ε"为3.02~4.03,无规排列短切纤维的介电常数实部ε'为10.5~12.0,虚部ε"为11.1~14.2,在2mm厚度下,无规排列短切纤维具有更高的介电损耗和更好的频散效应.
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