MnCoZn ferrite and production method for same
A manufacturing method, ferrite technology, applied in chemical instruments and methods, inorganic chemistry, inorganic material magnetism, etc., can solve the problems of insufficient grain boundary formation, lower resistivity, etc., and achieve the suppression of abnormal particle growth, squareness ratio, etc. Low, excellent damage resistance effect
Active Publication Date: 2019-11-05
JFE CHEMICAL CORP
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Abstract
Provided is a MnCoZn ferrite that not only has favorable magnetic characteristics such as high resistivity and low squareness ratio but also has excellent mechanical strength. A MnCoZn ferrite that comprises fundamental components, auxiliary components, and unavoidable impurities is disclosed. As the fundamental components, the MnCoZn ferrite includes at least 47.1 mol% but less than 50.0 mol% ofiron in terms of Fe2O3, at least 3.0 mol% but less than 15.5 mol% of zinc in terms of ZnO, and 0.5-4.0 mol% of cobalt in terms of CoO, the remainder being manganese. As the auxiliary components, the MnCoZn ferrite includes, relative to the fundamental components, 50-300 mass ppm of SiO2 and 300-1,300 mass ppm of CaO. The P, B, S, Cl, Bi, and Zr of the unavoidable impurities are suppressed to lessthan 50 mass ppm of P, less than 20 mass ppm of B, less than 30 mass ppm of S, less than 50 mass ppm of Cl, less than 20 mass ppm of Bi, and less than 20 mass ppm of Zr. As a result, the MnCoZn ferrite has a rattler value of less than 0.85%, a squareness ratio of no more than 0.35 at 100 DEG C, a relative resistivity of at least 30 Omega m, and a Curie temperature of at least 170 DEG C.
Application Domain
Inorganic material magnetismCobalt compounds
Technology Topic
High resistivityZinc +7
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PUM
Property | Measurement | Unit |
Outer diameter | 25.0 | mm |
The inside diameter of | 5.0 ~ 15.0 | mm |
Resistivity | >= 30.0 | m·Ω |
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