Rear-earth ferrite magnetic core material used for transformer

Abstract

The invention discloses a rear-earth ferrite magnetic core material used for a transformer. The rear-earth ferrite magnetic core material comprises main ingredients and additives, wherein the main ingredients comprise the following components in molar ratio: 61.4-70 mol of Fe2O3, 16.7-20 mol of manganese oxide, 10-14.2 mol of zinc oxide, 1-2 mol of copper oxide, 0.4-0.6 mol of calcium sulfate and 0.01-0.02 mol of rear-earth composite magnetic powder; the additives comprise the following components in proportion by weight (based on the ferrite magnetic core material): 40-50 ppm of chromic oxide and 800-1000 ppm of zinc borate. The rear-earth composite magnetic powder added in the ferrite magnetic core material disclosed by the invention is high in magnetic energy product, stable in magnetism and simple in preparation method; a finished product has characteristics of high crystal boundary resistivity, low porosity, great and uniform crystalline grain.

Description

[0001] technical field [0002] The invention mainly relates to the field of manufacture of oxide magnetic materials, in particular to a rare-earth ferrite core material used for transformers. Background technique [0003] With the development of communication technology and digitalization of electronic products, new requirements are put forward for soft ferrite and components. High-performance and high-permeability magnetic cores are widely used in various basic materials for telecommunications and information, such as common-mode filters, Saturated inductors, current transformers, leakage protectors, insulation transformers, signal and pulse transformers and other fields have been widely used. Now the electronic communication industry needs ferrite cores with low core loss and high magnetic permeability to meet the miniaturization and high efficiency requirements of electrical equipment. The existing magnetic cores are difficult to meet the above requirements; [0004] T...

AI Technical Summary

Problems solved by technology

Now the electronic communication industry needs ferrite cores with low core loss and high magnetic permeability to meet the miniaturization and high efficiency requirements of current electrical equipment, and the existing magnetic cores are difficult to meet the above requirements;