A kind of manufacturing method of ferromagnetic core loaded with boron oxide

Abstract

The invention discloses a method for manufacturing a ferromagnetic core loaded with boric oxide. The method includes steps of performing pre-sintering on a mixture A comprising Fe<3>O<4>, manganese oxide, the boric oxide, zirconium fluoride, nickel oxide, borax, ferric oxide powder and aluminum powder and a mixture B comprising tantalum, titanium, tungsten, MoO<3>, Nb<2>O<5>, magnesium carbonate, lanthanum oxide and barium carbonate; sequentially performing grinding, mixing and pulping, powder spray-drying, green body pressing and sintering processes on the mixture A and the mixture B to obtain the ferromagnetic core. The total weight of the mixture B is equivalent to that of the mixture A. The method has the advantages that owing to an optimized formulation design and the sintering process, the initial permeability of a product manufactured by the method is 12500, cracking of the sintered product is little, the qualified rate of the product reaches 93.0% at least, the product is high in grain boundary resistivity and low in porosity, crystal grains of the product are large and uniform, the impendence characteristic of the product in a high-frequency range is excellent, various electromagnetic properties of the product are stable, and the ferromagnetic core product is applicable to various electronic fields.

Description

technical field [0001] The invention relates to the field of manufacturing oxide magnetic materials, in particular to a method for manufacturing a ferromagnetic core loaded with boron oxide. Background technique [0002] 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 current electrical equipment. The existing magnetic cores are difficult to meet the above requirements. Cont...

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