超细镍粉/微米镍粉复合电磁屏蔽涂料的研究

Investigation on the electromagnetic shielding effectiveness of the composite paints filled with ultrafine and micro-size Ni particles

在水溶液中制备了大量的直径约为0.5μm的超细镍粉,将其与微米镍粉以不同的比例进行复合作为导电填料制备电磁屏蔽涂料。结果表明当超细镍粉与微米镍粉的比例适当时(质量比=1∶1),得到的涂料在130MHz^1.5GHz频段内具有比纯微米镍粉涂料更好的电磁屏蔽性能(40~55dB)。

Large-scale of ultrafine Ni particles with diameter about 0. 5μm were successfully by a facile chemical reduction method in aqueous solution. Composites filled with different proportion of ultrafine and micro-size Ni particles were fabricated to evaluate the electromagnetic interference shielding effectiveness. The results showed that the shielding effectiveness of ultrafine and micro-size Ni composites at quality ratio of 1 ： 1 could be 40- 55dB at 130MHz-1.5GHz,which is better than that of the composites filled with pure micro-size Ni particles.