TY - JOUR
T1 - Fabrication of hierarchical PANI@W-type barium hexaferrite composites for highly efficient microwave absorption
AU - Ren, Xiaohu
AU - Pu, Xilou
AU - Yin, Hongfeng
AU - Tang, Yun
AU - Yuan, Hudie
AU - Fan, Huiqing
N1 - Publisher Copyright:
© 2021
PY - 2021/5/1
Y1 - 2021/5/1
N2 - Hexagonal barium ferries is a promising and efficient microwave (MW) absorbing material, but the low dielectric loss and poor conductivity have limited their extensive applications. In this work, a simple tactic of coating conductive polymer PANI on hexaferrite BaCo2Fe16O27 is presented, wherein the dielectric properties are customized, and more significantly, the electromagnetic loss is greatly enhanced. As displayed from structural characterizations, PANI were coated equably on the surface of hexaferrite grains by an in-situ polymerization process. The outcomes exhibit the as-prepared PANI@hexaferrite composite has remarkable electromagnetic wave absorption capacity. When the thickness is 6.0 mm, the minimal RL of −40.4 dB was achieved at 2.9 GHz. The effective absorption bandwidth (RL < −20 dB) of 0.65 GHz, 0.53 GHz, 0.65 GHz, 0.52 GHz, 0.46 GHz and 0.39 GHz was achieved separately when the thickness ranges from 4 to 9 mm. The highly efficient MW absorbing performance of PANI@hexaferrite composite were the consequence of multiple loss mechanisms and perfect impedance matching. It is demonstrated that the PANI@hexaferrite composite with excellent MW absorption performance is expected to be potential MW absorbers for extensive applications.
AB - Hexagonal barium ferries is a promising and efficient microwave (MW) absorbing material, but the low dielectric loss and poor conductivity have limited their extensive applications. In this work, a simple tactic of coating conductive polymer PANI on hexaferrite BaCo2Fe16O27 is presented, wherein the dielectric properties are customized, and more significantly, the electromagnetic loss is greatly enhanced. As displayed from structural characterizations, PANI were coated equably on the surface of hexaferrite grains by an in-situ polymerization process. The outcomes exhibit the as-prepared PANI@hexaferrite composite has remarkable electromagnetic wave absorption capacity. When the thickness is 6.0 mm, the minimal RL of −40.4 dB was achieved at 2.9 GHz. The effective absorption bandwidth (RL < −20 dB) of 0.65 GHz, 0.53 GHz, 0.65 GHz, 0.52 GHz, 0.46 GHz and 0.39 GHz was achieved separately when the thickness ranges from 4 to 9 mm. The highly efficient MW absorbing performance of PANI@hexaferrite composite were the consequence of multiple loss mechanisms and perfect impedance matching. It is demonstrated that the PANI@hexaferrite composite with excellent MW absorption performance is expected to be potential MW absorbers for extensive applications.
KW - Composite
KW - Hexagonal ferrites
KW - Microwave absorption
KW - Polyaniline
UR - http://www.scopus.com/inward/record.url?scp=85099379489&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2021.01.057
DO - 10.1016/j.ceramint.2021.01.057
M3 - 文章
AN - SCOPUS:85099379489
SN - 0272-8842
VL - 47
SP - 12122
EP - 12129
JO - Ceramics International
JF - Ceramics International
IS - 9
ER -