【摘要】 以氟碳涂料为基体,氧化锡锑(ATO)、氮化硼(BN)、导电云母(CM)为颜料,PAN基短切碳化纤维为填料,制备了碳化纤维/氟碳涂料抗静电复合涂层,并研究了颜料和碳化纤维对复合涂层电性能和介电性能的影响。结果表明:800℃的碳化纤维使复合涂层的介电损耗角正切值(tanδ)明显增大,750℃的碳化纤维却使其有所下降,而两种纤维对介电常数(ε’)的影响都不大;BN有助于降低复合涂层的ε’和tanδ,对透波有利,然而却增大了涂层的表面电阻率,影响了涂层的抗静电性能。ATO和CM有助于降低涂层的表面电阻率却使得其介电损耗增加,尤其是CM,严重影响了氟碳涂料的透波性能;随着纤维碳化温度的增加,碳化纤维的导电性能增强,复合涂层的表面电阻率明显下降,颜料对涂层表面电阻率的影响也有所降低。更多还原

【Abstract】 A kind of antistatic composite was prepared with fluorocarbon coating as matrix,ATO,BN and conductive mica as pigments,PAN-based short carbonaceous fibers as conductive filler.The influences of pigments and carbonaceous fibers on electrical property and dielectric property of the composite were discussed.The results show that 800℃ carbonaceous fibers make dielectric loss angle tangent(tanδ) of the composite coating increase and 750℃ carbonaceous fibers make it decrease,and both of them have little impact on dielectric constant(ε′).BN makes tanδ and ε′ decrease and contributes to ware transmission,but makes the surface resistivity increase and reduces the antistatic property of the coating.ATO and CM can help to reduce surface resistivity of the coating but make dielectric loss increase,especially CM.With the conductivity of carbonaceous fibers improved,surface resistivity of the composite coating is significantly decreased and the influence of pigments on surface resistivity is simultaneously decreased.更多还原