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Enhanced Dispersion Frequency of Hot‐Pressed Z‐Type Magnetoplumbite Ferrite with the Composition 2CoO·3Ba 0.5 Sr 0.5 O·10.8Fe 2 O 3
Author(s) -
Kimura Osamu,
Matsumoto Masafumi,
Sakakura Mitsuo
Publication year - 1995
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.1151-2916.1995.tb08068.x
Subject(s) - ferrite (magnet) , analytical chemistry (journal) , materials science , hot pressing , composition (language) , strontium , oxygen , chemical composition , mineralogy , chemistry , metallurgy , composite material , linguistics , organic chemistry , chromatography , philosophy
The high‐frequency magnetic properties of strontium‐partially‐substituted Z‐type magnetoplumbite with the composition 2CoO·3Ba 1‐x .Sr x O.yFe 2 O 3 were studied using a hot‐pressing technique. The best properties were obtained for a sample hot‐pressed in oxygen, having x and y values of 0.5 and 10.8, respectively. The resonant frequency of that sample, corresponding to a μ” maximum reaching 2.5 GHz, was significantly larger than the value of 1.4 GHz previously reported for unsubstituted Z with the composition 2CoO·3BaO·12Fe 2 O 3 . This result implies that a new ferrite material, applicable in the gigahertz region, has been obtained.