BaTiO_(3)/碳纳米纤维网状复合吸波织物的制备及其吸波性能研究

Preparation and wave-absorbing properties of BaTiO_(3)/carbon nanofiber mesh composite wave-absorbing fabric

碳材料具有高比表面积、高介电常数和优异的导热性和导电性的特性,而钛酸钡介电性能优异,将二者复合可有效防控电磁污染。鉴于此,采用静电纺丝法制备BaTiO_(3)/PAN纳米纤维膜,再经预氧化、高温碳化处理得到了BaTiO_(3)/碳纳米纤维(BT/C)网状复合吸波织物,所制备出的吸波织物兼具轻、薄、宽频吸收的优点。结果表明,2.0%BT/C具有最佳的综合性能,碳纤维排列致密,BaTiO_(3)晶型完整、分散良好,且在2.3 mm处的反射损耗达-61.72 dB,最大的吸波带宽达到8.5 GHz,具有优异的吸波性能。

Carbon materials have high specific surface area,high dielectric constant,and excellent thermal and electrical conductivity characteristics,and BaTiO_(3)has excellent dielectric properties.The combation of the two materials can effectively prevent and control electromagnetic pollution.In view of this,the BaTiO_(3)/PAN nanofiber film was prepared by electrospinning method,and then the BaTiO_(3)/carbon nanofiber mesh composite absorbing fabric was obtained by pre-oxidation and high temperature carbonization treatment.The nanofiber film prepared has the advantages of light,thin and wide bandwidth absorption.The results show that 2.0%BT/C has the best comprehensive performance,the carbon fiber arrangement is dense,the BaTiO_(3)crystal form is complete and well dispersed,and the reflection loss at 2.3 mm reaches−61.72 dB,and the maximum absorption bandwidth reaches 8.5 GHz,which has excellent wave absorption.