【摘要】 首次对超细Fe3Al粒子填充PVC复合材料的电性能进行了研究。当超细Fe3Al粒子的加入量为5％(质量分数)时PVC复合材料的ρ下降较大,随着Fe3Al用量的增加,ρ变化不大;表面经HSt和A-172处理的Fe3Al/PVC复合材料的ρ分别下降了6个和7个数量级,表面处理对超细Fe3Al粒子在PVC基体中的分散性有很大影响;混炼时间为5min复合材料的ρ最低;Fe3Al粒径大于5μm,ρ随粒径变化较小,小于0.5um则ρ显著下降;超细Fe3Al/PVC复合材料在T小于80℃随温度升高,ρ逐渐有所增大,之后,随着温度的升高ρ有所下降。总之,超细Fe3Al粒子能够显著改善PVC基体的室温电性能。更多还原

【Abstract】 Electric property of PVC composite filled with ultrafine Fe3Al intermatellic particles was investigated. The results show that the resistivity of FeaAl/PVC composite decreases sharply when the filler concentration is wt5%. The resistivity of ultrafine FesAl treated by HSt and A - 172 decreases 106 and 107 times respectively at room temperature because the surface treatment could make ultrafine Fe3Al disperse into PVC matrix to form the conduct network. The resistivity decreases greatly with the diameter of Fe3Al powders. It gradually increases at the range of 30 - 80℃, then decreases slightly with increase of temperature. The resistivity of the composite is also affected by the plasticization time and it is lowest at 5min. The reasons were discussed as above.更多还原