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Formula for ferrite magnetic core

A ferrite core and formula technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of ferrite cores such as poor pressure resistance, unstable Q value, and low insulation resistance, and achieve magnetic The effect of high core density, high compressive coefficient and high shear strength

Pending Publication Date: 2020-11-13
洛阳中赫非晶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The formulation of existing products leads to poor voltage resistance of the final ferrite core, and it is easy to be broken down when the voltage reaches 2500V; the insulation resistance is low; the Q value is unstable, (Q value: the ratio of inductive reactance to its equivalent loss resistance )

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A formula for a ferrite core, said formula comprising the following mass ratio: 60 parts of Fe2O3, 2.5 parts of CuO, 16.5 parts of ZnO, 0.25 parts of Bi2O3, 4.5 parts of MnCO3, 6.1 parts of MgO, 10 parts of NiO.

[0016] The Q value of the finally prepared ferrite core is unstable, the insulation current is less than 80A, the sintering process is unstable, and the operating frequency is unstable.

Embodiment 2

[0018] A formula for a ferrite core, said formula comprising the following mass ratio: 60 parts of Fe2O3, 2.5 parts of CuO, 16.5 parts of ZnO, 0.25 parts of Bi2O3, 0.5 parts of CoO, 4.5 parts of MnCO3, 6.1 parts of MgO, 10 parts of NiO.

[0019] The magnetic permeability of the finally prepared ferrite magnetic core is reduced, and the magnetic permeability is reduced by 10% compared with the embodiment 1. At the same time, due to the high price of CoO, the cost is increased compared with the embodiment 1, and the operation is more troublesome.

Embodiment 3

[0021] A formula for a ferrite core, said formula comprising the following mass ratio: 60 parts of Fe2O3, 2.5 parts of CuO, 16.5 parts of ZnO, 0.25 parts of Bi2O3, 0.15 parts of CoO, 4.5 parts of MnCO3, 6.1 parts of MgO, 10 parts of NiO.

[0022] Compared with Example 1 and Example 2, the finally prepared ferrite core has a stable Q value, an improved withstand voltage coefficient, and can withstand a voltage of 3500-4000V, and an increased magnetic core density, which can reach 4.9g / cm3. The magnetic saturation and high magnetic permeability, the magnetic permeability is improved by 12% compared with the first embodiment, although the addition of CoO leads to an increase in cost and more troublesome operation, but the amount added is less and the cost increase is less, but in the end the iron The performance of the oxygen magnetic core is more superior, and it has a qualitative improvement compared with the first and second embodiments.

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Abstract

The invention discloses a formula for a ferrite magnetic core. The ferrite magnetic core is prepared from the following components in parts by mass: 50 to 65 parts of Fe2O3, 2 to 3 parts of CuO, 14 to18 parts of ZnO, 0.1 to 0.3 part of Bi2O3, 0.08 to 0.2 part of CoO, 2 to 5 parts of MnCO3, 5 to 8 parts of MgO and 8 to 15 parts of NiO. The ferrite magnetic core produced according to the formula has a stable Q value; the withstand voltage coefficient is high, and the withstand voltage can reach 3500-4000 V; the magnetic core is high in density which can reach 4.9 g / cm < 3 >, high in shear strength which can reach 15-20 MPa, high in magnetic saturation strength and high in magnetic permeability.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a formula for ferrite cores. Background technique [0002] Ferrite cores are widely composed of three metal elements: iron (Fe), manganese (Mn), and zinc (Zn), commonly known as manganese-zinc ferrite. Toroidal ferrite cores have high magnetic effects due to their absence of gaps and uniform cross-sectional area. [0003] There are many specifications and sizes of ferrite magnetic rings, which can be selected according to the different materials of the magnetic rings, and different coatings can be used to simplify winding and increase breakdown voltage. [0004] The ferrite core is made of non-metallic magnetic material with dense and homogeneous ceramic structure, and has low coercive force, also known as soft ferrite. It consists of iron oxide (Fe2O3) and oxide or carbonate compounds of one or several other metals (eg manganese, zinc, nickel, magnesium). The ferri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34
CPCH01F1/344
Inventor 李高锋姚红杰
Owner 洛阳中赫非晶科技有限公司
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