【摘要】 将四针状纳米ZnO作为吸收剂、环氧树脂为粘结剂制备成吸波涂层,分析了吸波涂层中的四针状纳米氧化锌含量及涂层厚度对吸波性能的影响,当涂层厚度为1·5mm时,吸收主要集中在15—18GHz波段;当涂层厚度增加到3·5mm后,样品的吸波性能提高明显,特别在6—11GHz之间的吸波性能提高显著,样品反射率小于-5dB的频率宽度达到13·6GHz(4·4—18GHz),其吸波性能相比较微米级ZnO有显著提高.最后对四针状纳米氧化锌的吸波机理进行了讨论.所研究的涂层在电磁波屏蔽方面具有较大的应用价值.更多还原

【Abstract】 Wave-absorbing coating samples were fabricated with nano tetraleg ZnO as the absorbent and epoxy resin as the binder. The influence of the content of nano tetrapleg ZnO in the absorbing coatings and the thickness of the coatings on wave-absorbing property was investigated. The results showed that excellent absorption was observed in the wave band from 15GHz to 18GHz when the coating thickness was 1.5mm. When the coating thickness increased to 3.5mm, the wave-absorbing property of the samples was improved significantly, especially in the wave band from 6GHz to 11GHz. The frequency width reached 13.6GHz (4.4—18GHz) when the reflection value of the samples was below -5dB, its wave-absorbing property has obviously improved compared with that of the micrometer sized ZnO. Finally, the wave-absorbing mechanism of nano tetraleg ZnO was discussed. Such coatings are of great values in applications involving electromagnetic wave shielding.更多还原