80 or more being possessed with the magnetic oxide sintered body, and the high frequency circuit

摘要

PROBLEM TO BE SOLVED: To provide a sintered magnetic oxide which has excellent magnetic properties and is usable up to a high-frequency band of a few hundred MHz to GHz, contains no dissimilar phase other than Y-type hexagonal ferrite as much as possible, and can be baked at 1000°C or below, especially around 900°C, and to provide a high-frequency circuit part using the same.;SOLUTION: This magnetic oxide sintered body contains Y-type hexagonal ferrite of 80% or above. The magnetic oxide sintered body contains 3 to 15 mol% cobalt oxide in terms of CoO, 5.5 to 17 mol% copper oxide in terms of CuO, 57 to 61 mol% iron oxide in terms of Fe₂O₃, and residual mol% AO (AO is either BaO or SrO) and 0.5 to 7 wt.% bismuth oxide(Bi₂O₃) as an auxiliary component.;COPYRIGHT: (C)2002,JPO