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Influence of matching thickness on the absorption properties of doped barium ferrites at microwave frequencies
Author(s) -
Ghasemi A.,
Saatchi A.,
Salehi M.,
Hossienpour A,
Morisako A.,
Liu X.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200521143
Subject(s) - materials science , barium ferrite , ferrite (magnet) , microwave , grain size , ceramic , doping , impurity , reflection loss , analytical chemistry (journal) , composite material , composite number , optoelectronics , chemistry , physics , organic chemistry , chromatography , quantum mechanics
The development and characterization of hexagonal ferrite powders of BaFe 9 Mn 1.5 Ti 1.5 O 19 , BaFe 9 Mn 1.5 Co 1.5 O 19 , and BaFe 9 Ti 1.5 Co 1.5 O 19 as the microwave absorbers have been investigated. The ferrites were fabricated by conventional ceramic technology. The developed ferrite powders 80% by weight were mixed with polyvinylchloride plasticizer and fired to form rubber‐ferrite with the thickness of 1.5 mm, 2 mm and 2.5 mm. XRD was used to identify structures of the samples. The magnetoplumbite structures for all the samples have been formed. Vibrating sample magnetometer was used to determine the hysteresis loops of barium ferrite and BaFe 9 Mn 1.5 Ti 1.5 O 19 at room temperature. The vector network analyzers in the frequency range of 12 to 20 GHz have measured the reflection loss properties of rubber‐ferrite. It was concluded that BaFe 9 Mn 1.5 Ti 1.5 O 19 with thickness of 2 mm could be designed as a wide‐band microwave absorber. By SEM, the size and morphology of grains in BaFe 9 Mn 1.5 Ti 1.5 O 19 ferrite were examined. The results showed that ferrite with grain size of 5 µm do not have any impurities. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)