A ferrite material with high saturation magnetic induction and high DC superposition

Abstract

The invention discloses a ferrite material with high saturation magnetic induction intensity and high direct current superposition. The ferrite material comprises the following components by percentage: 20%-21% of Mn, 5%-6% of Zn, 2%-3% of Ni, 0.1%-0.4% of trace metal elements, and the balance Fe. The ratio of Fe, Zn and Mn in ferrite is adjusted and the Fe content is increased to enhance the highsaturation magnetic induction intensity of the material, and Ni is added to make up for the power consumption valley point temperature reduction caused by Fe content increase. Decrease of Mn contentcan reduce the residual magnetic intensity of the material and strengthen the direct current superposition performance of the ferrite material. The ferrite material provided by the invention has the characteristics of high saturation magnetic induction intensity, low residual magnetic intensity, low power loss at high temperature and high direct current superposition.

Description

technical field [0001] The invention relates to the technical field of ferrite, in particular to a ferrite material with high saturation magnetic induction and high DC superposition. Background technique [0002] Ferrite cores are increasingly used in various electronic circuits. However, in some circuits, devices often need to work in a certain DC state, such as output transformers, smoothing choke coils, etc. In this case, in addition to good electromagnetic properties, the magnetic core also needs to have good DC superposition properties. That is to say, under the superimposed DC, the decline rate of the core inductance is lower. Now, more than 80% of the manufacturers have already required the DC superposition. Foreign manufacturers and enterprises pay special attention to the DC superposition performance, such as South Korea’s Samsung, Japan’s Panasonic and other companies. At present, TDK, as a leading enterprise of soft magnetic materials, only has a few such produc...

AI Technical Summary

Problems solved by technology

There are already a few factories in China that can mass-produce products equivalent to TDK HV22 and HV38, but for HV40 and HV45 products, there is no domestic manufacturer that can produce stably