High-temperature low-loss material as well as preparation method and application thereof

By adjusting the ratio of Fe2O3, MnO, and ZnO and using additives, the magnetocrystalline anisotropy constant and magnetostriction coefficient are controlled, reducing the high-temperature loss of MnZn power ferrite materials. This solves the problems of high high-temperature loss and complex production in existing technologies, achieving the effects of low loss and simplified production.

CN121990820APending Publication Date: 2026-05-08HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENGDIAN GRP DMEGC MAGNETICS CO LTD
Filing Date
2024-11-08
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing MnZn power ferrite materials suffer from high losses at high temperatures, and traditional preparation methods are complex, making them unsuitable for mass production and failing to meet the requirements for device miniaturization and high efficiency.

Method used

By adjusting the ratio of Fe2O3, MnO and ZnO, and adding specific types and amounts of additives such as CaCO3, ZrO2, Nb2O5 and Co2O3, the magnetocrystalline anisotropy constant K1 is controlled to be 0 at 130℃, the magnetostriction coefficient λ is reduced, the preparation process is simplified, and it is suitable for industrial production.

Benefits of technology

Under the conditions of 100kHz and 200mT, the loss is reduced to less than 330kW/m3 at 130℃, less than 350kW/m3 at 150℃, and less than 385kW/m3 at 160℃, achieving the effect of high temperature and low loss, and simplifying the production process.

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Abstract

The invention discloses a high-temperature low-loss material as well as a preparation method and application thereof. Raw materials of the high-temperature low-loss material comprise a main formula and additives, the main formula comprises 52.55 mol% to 52.7 mol% of Fe2O3, 38.4 mol% to 40.45 mol% of MnO and 7 mol% to 8.9 mol% of ZnO, and the additives comprise 0.12% to 0.18% of CaCO3, 0.04% to 0.055% of ZrO2, 0.02% to 0.04% of Nb2O5 and 0.46% to 0.52% of Co2O3 on the basis of the total weight of the main formula. The high-temperature low-loss material is tested under the conditions of 100kHz and 200mT, the loss at 130 DEG C is less than 330kW / m < 3 >, the loss at 150 DEG C is less than 350kW / m < 3 >, and the loss at 160 DEG C is less than 385kW / m < 3 >.
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Citation Information

Patent Citations

  • A wide-temperature, ultra-low-power manganese-zinc ferrite material and its preparation method

    CN112707723B

  • A wide-temperature, low-power manganese-zinc ferrite PF-2T material and its preparation process

    CN115385677B