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Effect of Particle Size and Concentration on Microwave‐Absorbing Properties of Cu x Co 2− x Y ( x =0, 1) Hexaferrite Composites
Author(s) -
Li Xiangcheng,
Gong Rongzhou,
Feng Zekun,
Yan Junbing,
Shen Xiang,
He Huahui
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2006.00873.x
Subject(s) - reflection loss , materials science , composite material , microwave , permittivity , ceramic , attenuation , particle size , permeability (electromagnetism) , composite number , dielectric , optics , optoelectronics , chemistry , physics , quantum mechanics , membrane , biochemistry
Co 2 Y‐type hexaferrites (Ba 2 Cu x Co 2− x Fe 12 O 22 , x =0,1) have been fabricated by the conventional ceramic process. The complex permittivity and permeability of Co 2 Y hexaferrite composites have been measured using a vector network analyzer in the frequency range of 2–18 GHz. The results show that Co 2 Y hexaferrite composites have a high permeability and a low permittivity. This can be adjusted by a CuO additive and particle sizes. The reflection loss (RL) values of Co 2 Y hexaferrite composites backed with a conducting plate indicate that the composites possess good microwave‐absorbing properties. The minimum RL value of the composites was below −30 dB. The microwave‐absorbing materials with 10 GHz (8 GHz) bandwidth for attenuation of 5 dB (10 dB) can be achieved.