MSA  Vol.5 No.13 , November 2014
Low-Loss Co2-Y Ferrites with Added CuO Sintered in Air for High Frequency Application
ABSTRACT
The sintering characteristics of hexagonal Co2-Y-type ferrite, Ba2Co2Fe12O22, with the addition of 0.6 wt% CuO, were studied in order to allow for preparation in air, as opposed to the conventionally recommended O2, for industrial production. The dependence of the resistivity, ρ magnetic loss, tanδ, and the permeability, μ, at 1 GHz on the sintering temperature was investigated. A low tanδ of 0.05 with a m of 2.7 at a frequency of 1 GHz, along with a high ρ (up to 7 × 104 μm), were attained under sintering at 1170°C in air, which were the same features as those of samples sintered at 1200°C in O2. The dependence of tanδ on grain diameter was also examined, and it was determined that a small grain size (less than 2 μm) is preferable for low tanδ.

Cite this paper
Fujii, S. , Wakamatsu, K. , Satoh, H. and Yamamoto, S. (2014) Low-Loss Co2-Y Ferrites with Added CuO Sintered in Air for High Frequency Application. Materials Sciences and Applications, 5, 984-989. doi: 10.4236/msa.2014.513099.
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