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- Title
A Polypyrrole/CoFeO/Hollow Glass Microspheres three-layer sandwich structure microwave absorbing material with wide absorbing bandwidth and strong absorbing capacity.
- Authors
Wang, Xingwei; Yan, Hongxia; Xue, Rong; Qi, Shuhua
- Abstract
A new PPy/CoFeO/HGMs microwave absorbing composite particle with three-layer sandwich structure, comprising cobalt ferrite (CoFeO) 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 CoFeO completely and the obtained CoFeO/HGMs composites were warped by PPy. The conductivity and the saturation magnetization Ms of the resulting PPy/CoFeO/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.
- Subjects
COMPOSITE particles (Composite materials); COBALT; POLYPYRROLE; MICROSPHERES; POLYMERIZATION; ELECTRON microscopes; X-ray diffractometers; SATURATION (Chemistry)
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 1, p519
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-5553-7