| 摘要 |
PURPOSE: A method for manufacturing Y-type ferrite and the Y-type ferrite are provided to secure high magnetic permeability of more than 2 in a high frequency band of more than 1GHz by substituting some cobalt ions contained in the Y-type ferrite with zinc ions. CONSTITUTION: The composition formula of Y-type ferrite is represented by Ba_2Co_2-xZn_xFe_12O_22. In the composition formula, the value of the x is between 0.5 and 1.5. A method for manufacturing the Y-type ferrite includes the following: A starting material containing a barium compound, a cobalt compound, an iron compound, and a zinc compound is prepared. The starting material is dissolved and mixed(S120). The mixed solution of the starting material is coprecipitated(S130). The coprecipitated material is washed, filtered, and dried(S140). The dried material is thermally treated one or more times(S150, S160). The molar ratio of the barium compound, the cobalt compound, the iron compound, and the zinc compound is 2:2-x:x:12.
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