A Polypyrrole/CoFe2O4/Hollow Glass Microspheres three-layer sandwich structure microwave absorbing material with wide absorbing bandwidth and strong absorbing capacity

作者：Wang, Xingwei; Yan, Hongxia; Xue, Rong; Qi, Shuhua^*

来源：Journal of Materials Science: Materials in Electronics , 2017, 28(1): 519-525.

DOI：10.1007/s10854-016-5553-7

• ELECTROMAGNETIC-WAVE ABSORPTION
• FACILE SYNTHESIS
• HOLLOW SPHERES
• DIELECTRIC-PROPERTIES
• ESTER COPOLYMER
• COMPOSITES
• PARTICLES
• PERMEABILITY
• BENZOXAZINE
• FABRICATION

A new PPy/CoFe2O4/HGMs microwave absorbing composite particle with three-layer sandwich structure, comprising cobalt ferrite (CoFe2O4) and polypyrrole (PPy) coating on the surface of hollow glass microspheres (HGMs), was synthesized by the method of co-precipitation and in situ polymerization. The surface morphology, phase structure and chemical component of the composite had been characterized by scanning electron microscope and X-ray diffractometer. The results indicated HGMs were coated by CoFe2O4 completely and the obtained CoFe2O4/HGMs composites were warped by PPy. The conductivity and the saturation magnetization Ms of the resulting PPy/CoFe2O4/HGMs composites are 0.09 S/cm and 46 emu/g, respectively. The vector network analyzer showed the composite performed better microwave absorption ability than that of PPy and PPy/HGMs. The reflection loss of the composite with 2.58 mm thickness is more than-10 dB which means over 90 % microwave is absorbed in X-band (8.38-12.4 GHz). The ternary composite that has light weight, wide absorbing bandwidth, strong absorbing capacity and conductivity can be an attractive candidate in the field of microwave absorption.

• 出版日期2017-1
• 单位西北工业大学