High-frequency high-power Ni-Zn base magnetic ferrite material and manufacturing method thereof

Abstract

The invention discloses a high-frequency high-power Ni-Zn base magnetic ferrite material and a manufacturing method thereof. The Ni-Zn base magnetic ferrite material comprises a main ingredient, an ionic substitute ingredient and a compound composite and doped ingredient, wherein the main ingredient comprises Fe2O3, ZnO and the balance of NiO; the ionic substitute ingredient comprises one or more kinds of Co3O4, MnCO3 and CuO containing Co3O4; and the compound composite and doped ingredient comprises 2-3 kinds of V2O5, Bi2O3, Ta2O5, ZrO2, CuO, Nb2O5 and Co3O4. The manufacturing method comprises the following steps: (a) preparing a Ni-Zn base ferrite main ingredient mixture; (b) preparing a main ingredient pre-sintered material; (c) preparing micro-fine ferrite powder; (d) preparing a raw blank of a magnetic core; and (e) sintering the magnetic core. The invention obtains the Ni-Zn base magnetic ferrite material with high electromagnetic performance, high strength, high frequency and low loss by optimizing the composite design of a formulation and adopting the manufacturing method of the high-frequency high-power Ni-Zn base magnetic ferrite material. The Ni-Zn base magnetic ferrite material is used for high-power equipment of 1-30MHz and used as the magnetic core for a transformer, an inductor, a filter, a tuner, and the like.

Description

technical field [0001] The invention relates to a nickel-zinc-based soft ferrite material and a manufacturing method thereof, in particular to a high-frequency and high-power nickel-zinc-based soft ferrite material and a manufacturing method thereof. Background technique [0002] NiZn soft magnetic ferrite material is an important type of soft magnetic material in magnetic materials. It is widely used because of its easy formation of small grains, porous structure, high resistivity ρ, low loss tangent tanδ, and good high-frequency characteristics. Electronic products in high-frequency fields such as aviation, navigation, communication, radio and television, instrumentation, electric power, network digitization, automatic control, computers, automobiles, medical equipment, high-frequency welding machines, household appliances, green lighting projects, and anti-electromagnetic interference Among them, it is used as magnetic cores for inductors, transformers, filters, choke coi...

AI Technical Summary

Problems solved by technology

[0003] With the development of electronics industry, information industry, digital technology and optical fiber communication technology, new requirements are put forward for the performance of soft ferrite materials. Ordinary NiZn soft ferrite prepared by traditional dry oxide method (low energy ball milling) Ferrite materials can no longer meet the requirements of specific occasions (such as high-frequency and high-power occasions). Therefore, in recent years, more and more new chemical methods have been used to prepare ferrite materials, such as chemical co-precipitation method, hydrothermal method, microemulsion method, sol-gel method, self-propagating high-temperature synthesis method, spray roasting method, high-energy ball milling method, etc.

However, for the different uses and performance requirements of materials, these new chemical methods have some shortcomings and shortcomings, which need to be improved and improved to meet the new requirements for the development of materials used in specific occasions.

At the same time, with the rapid development of the electronic information industry, there are more and more demands for soft magnetic materials applied under high-frequency and high-power conditions. The comprehensive performance of magnetic properties and magnetic properties is low, and the product quality is unstable, and the repeatability of product performance preparation is poor, thus affecting its application in high-frequency and high-power occasions

Ordinary NiZn soft magnetic ferrite materials under high power conditions, due to the current of ampere magnitude passing through the core coil, the core loss is high, the heat is large, the temperature rises quickly, and the high temperature causes the core to "burst" or the core to "failure". "The product does not work normally, or the magnetic core is saturated due to the increase of the external magnetic field formed by the current, and the signal cannot be transmitted.

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