| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ferrite ceramic composition for an irreversible circuit device in which sufficient irreversibility is attained even in the use in ≤10 GHz or 30 to 60 GHz microwave band and magnetic loss is reduced. <P>SOLUTION: The ferrite ceramic composition for the irreversible circuit device contains a main component expressed by a general formula, (Sr<SB>1-x</SB>Ba<SB>x</SB>)O-n(Fe<SB>1-y-z</SB>Me<SB>y</SB>Sn<SB>z</SB>)<SB>2</SB>O<SB>3</SB>(0≤x≤1.0, 5.0<n≤6.5, y>0, z>0), wherein Me represents at least one kind of divalent metal elements. When Me is Zn, y and z are respectively 0<y≤0.29 and 0<z≤0.29. When Me is Cu, y and z are respectively 0<y≤0.33 and 0<z≤0.33. When Me is Co, y and z are respectively 0<y≤0.39 and 0<z≤0.39, and when Me is Ni, Mg or Mn, y and Z are respectively 0<y≤0.28 and 0<z≤0.28. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
