| 摘要 |
PROBLEM TO BE SOLVED: To obtain a soft hexagonal ferrite which is improved in characteristics such as eddy current loss and permeability in a high-frequency range by a method wherein ferroxplanar-type ferrite is made to contain SiO2 and CaO. SOLUTION: Ferroxplanar-type ferrite is represented by BaO-Fe2 O3 -MeO (a ratio BaO:Fe2 O3 :MeO stands at 10 to 30mol%: 56 to 65mol%: 8 to 25mol%), wherein Me is bivalent metal ion selected from Zn, Co, Ni, Cu, and Mn, or represented by BaO-Fe2 O3 -CoO (a ratio BaO-Fe2 O3 -CoO is 15 to 28mol%: 65 to 75mol%: 5 to 15mol%), wherein 0.05 to 0.5wt.% of SiO2 and 0.05 to 0.5wt.% of CaO are contained in feroxaplanar-type ferrite. By this setup, a feroxaplanar-type soft magnetic hexagonal ferrite improved in permeability in a high-frequency range can be obtained and used as an effective soft magnetic material used for an electronic equipment which operates on high frequencies. |
