Method for producing soft magnetic ferrite core

Abstract

The invention discloses a method for producing a soft magnetic ferrite core. The method comprises the following steps of: mixing of raw materials, pre-sintering, ball milling, compression moulding, secondary sintering, grinding and detection, wherein an integral magnetic-attraction double-sided grinding machine is adopted in the grinding process. The magnetic core produced by the method has high magnetic conductivity and low loss factor, and energy sources can be saved; the magnetic core has uniform color, flat end surface and bright and clean surface; the ball milling as well as the uniformity and sphericity of the mixed material are improved; a low-temperature sintering technology is adopted, the heating rate and cooling rate of each stage are adjusted, the ferrite transformation of the material is promoted, and the grain size can be effectively controlled; and the initial permeability and temperature characteristic are improved.

Description

technical field

[0001] The invention relates to the field of production methods of magnetic cores, in particular to a method for producing soft ferrite cores. Background technique

[0002] In the existing production process of soft ferrite cores, ordinary grinding machines are used for grinding on one side in turn, which is inefficient, and because ferrite cores are brittle and hard solid components, they should be handled with care. Handle with care to avoid impact and fall. Second, if the traditional grinding method is used, too many installation times will easily lead to damage to the magnetic core, troublesome operation, and large dimensional deviations.

[0003] Most of the existing soft ferrite core ball mills adopt the ball milling method of uniform rotation, and the particle size distribution of the powder is not ideal, which makes it difficult to improve the magnetic properties. In view of the fact that the crushing effect is better when the ball mill is runnin...

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