Screening method for improving magnetic conductivity of ferrite magnetic core

Abstract

The invention relates to a screening method for improving magnetic conductivity of a ferrite magnetic core. The screening method comprises the following steps: selecting ferrite powder with uniform granularity and good mobility, stirring, adjusting a rotating speed of a stirrer, guiding an ingredient additive, and doping; pressing the doped powder into an expected shape by using a molding pressingmachine, and obtaining a green body of the expected shape; and sintering the green body of the expected shape, cutting, grinding, and grading screening. By adopting the screening method, the inlet gas is uniform in reaction, the sintered product is same in quality, the cost is high, the screening can be effectively carried out, the utilization rate of the product is improved, and the convenienceis brought to the selection of a user.

Description

technical field [0001] The invention relates to the processing field, in particular to a screening method for improving the magnetic permeability of ferrite cores. Background technique [0002] Ferrite is a metal oxide with ferromagnetic properties. In terms of electrical properties, the resistivity of ferrite is much larger than that of metal and alloy magnetic materials, and it also has higher dielectric properties. The magnetic properties of ferrite are also shown to have higher magnetic permeability at high frequencies. Therefore, ferrite has become a widely used non-metallic magnetic material in the field of high frequency and weak current. [0003] Due to the different sintering process of the ferrite powder used in the existing ferrite molding blanks after sintering, the finished ferrite products obtained after sintering are easy to crack, the yield is low, and ferrites of different quality are used The magnetic permeability and resistance pass rate of powder sinte...

AI Technical Summary

Problems solved by technology

[0003] Due to the different sintering process of the ferrite powder used in the existing ferrite molding blanks after sintering, the finished ferrite products obtained after sintering are easy to crack, the yield is low, and ferrites of different quality are used The magnetic permeability and resistance pass rate of the finished ferrite powder sintered are also different, and the difference is very large

For example, in the previous application, the patent application with application number 201210097053.0 introduced a high permeability magnetic core manufacturing method, the patent application with application number 201510962086.0 introduced a ferrite powder sintering process, and the application number 201510962025.4 The patent application introduces a method for preparing an E-shaped magnetic core. Although the technical solution of the above patent application can improve productivity, in the process of sintering, the product quality should be consistent after sintering in the furnace under ideal conditions. However, in the prior art The quality of the sintered products discharged from different positions is not the same, and most of the placement is based on experience, and the yield is low

[0004] At the same time, the final product is not classified according to its own technical indicators, the utilization rate is low, and it is inconvenient for users to choose

Images