A kind of wide frequency wide temperature high power density low loss manganese zinc soft magnetic ferrite material and preparation method thereof

Abstract

The invention discloses a broadband wide temperature range high-power density low-loss manganese-zinc soft magnetic ferrite material. The material comprises main ingredients, an auxiliary ingredient A and an auxiliary ingredient B, wherein the main ingredients comprise the following components in percentage by weight: Fe2O3, MnO and ZnO; based on the weight of the main ingredients, the auxiliary ingredient A comprises at least three of CaCO3, Nb2O5, NiO, SnO2 and Co3O4; and the auxiliary ingredient B comprises at least three of SiO2, Y2O3, K2CO3, Al2O3, CuO, MoO and Bi2O3. The preparation method of the material sequentially comprises the following steps: primary batching, primary sanding, pre-sintering, secondary batching, secondary sanding, performing component analysis, performing spray granulation, molding and sintering. The material disclosed by the invention has low loss in a temperature range from 20 DEG C below zero to 120 DEG C under the conditions of 100-500KHz and 100-200mT, and has high magnetic conductivity and high high-temperature saturation flux density. Compared with the conventional material, the material disclosed by the invention is energy-saving and can enable a switching power module to be miniature and efficient.

Description

technical field [0001] The invention relates to the field of manganese-zinc ferrite magnetic materials, in particular to a manganese-zinc soft magnetic ferrite material with wide frequency, wide temperature, high power density and low loss and a preparation method thereof. Background technique [0002] In the application of power electronic technology and basic power system, switching power supply is at the core. The traditional phase-controlled power supply is very bulky and heavy. If high-frequency switching power supply technology can be used, its volume and weight will be greatly reduced, and it can greatly improve power utilization, save materials, and reduce costs. In electric vehicles and frequency conversion drives, switching power supply technology is even more inseparable, through switching power supply to change the power frequency, so as to achieve near-ideal load matching and drive control. High-frequency switching power supply technology is the core technology...

AI Technical Summary

Problems solved by technology

However, the patent does not disclose and cannot really achieve the purpose of low loss, and the patent does not disclose how much power loss can be achieved.

From the background technology of the patent and the scope of its disclosed master formula, it can be known that its main application fields are communication and signal processing, and it cannot achieve low-loss functions when applied to high-frequency switching power supplies.

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