High-frequency manganese-magnesium ferrite as well as preparation method and application thereof
By adding a specific amount of MgO and control sub-components to the high-frequency manganese ferrite material, combined with the oxygen partial pressure during the sintering process, the problem of high-frequency loss is solved, and high-frequency power electronics applications with low power loss are realized.
CN120504538APending Publication Date: 2025-08-19SUZHOU TIANYUAN MAGNETIC MATERIALS CO LTD
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Patent Information
- Application Number
- CN202510683596.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2025-08-19
AI Technical Summary
Technical Problem
The high-frequency loss of existing high-frequency manganese ferrite materials is relatively high, making it difficult to meet the needs of high-frequency power electronic technology.
Method used
High-frequency manganese mafferrites are prepared by adding a specific content of MgO to the main component to replace part of manganese ferrite, and controlling the content of the secondary component and the oxygen partial pressure during sintering.
Benefits of technology
It improves the resistivity of composite materials, reduces eddy current losses, and meets the low power loss requirements of high-frequency power electronic technology.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a high-frequency manganese-magnesium ferrite and a preparation method and application thereof, the high-frequency manganese-magnesium ferrite comprises main components and auxiliary components, and the main components comprise 57.4-59.6 mol% of Fe2O3, more than 0 and less than or equal to 2.0 mol% of MgO and the balance of MnO according to molar percentage content. During preparation, the raw materials in the main components are mixed and pre-sintered in proportion, then the raw materials in the auxiliary components are added to be ground, the binder is added to be granulated, and a formed body is obtained; and sintering the molded body, and cooling the molded body to room temperature in a protective gas atmosphere to obtain the high-frequency manganese-magnesium ferrite, during sintering, the oxygen partial pressure concentration from 700 DEG C to the sintering temperature is controlled to be smaller than or equal to 0.5%. The specific content of magnesium ferrite is used for partially replacing manganese ferrite, so that the resistivity of the composite material is improved, and the high-frequency loss is reduced.
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