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Ultrahigh-Bs low-loss manganese-zinc ferrite material and preparation method thereof

A manganese-zinc ferrite and ferrite material technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, inorganic materials, etc. The effect of reducing R&D costs and development cycle

Active Publication Date: 2021-12-24
海宁辉恒磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the DMEGC patent whose authorization number is CN105384435, different ratios of Fe are used 2 o 3 , ZnO, NiO, and MnO as raw materials, the saturation magnetic flux density B at 100°C was prepared s Ultra-high Bs ferrite material with a value of about 490mT, but at 100°C, it is 1250kW / m at 100kHz / 200mT 3 Left and right, the power loss is much higher than that of conventional materials such as PC40 and PC95, which seriously affects its actual use, and a large amount of precious metal nickel is used in it, and the production cost is high

Method used

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  • Ultrahigh-Bs low-loss manganese-zinc ferrite material and preparation method thereof
  • Ultrahigh-Bs low-loss manganese-zinc ferrite material and preparation method thereof
  • Ultrahigh-Bs low-loss manganese-zinc ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0028] FeFe in ferrite material 2 o 4 , MnFe 2 o 4 , ZnFe 2 o 4 , Li 0.5 Fe 0.5 Fe 2 o 4 Four unit ferrite content α, β, γ, θ, respectively satisfying 5.239≤M B ≤5.345 and 0.604≤T k ≤0.623, the additive combination is 0.07wt% CaCO 3 , 0.04wt%Nb 2 o 5 , 0.05wt%V 2 o 5 , 0.10wt%TiO 2 , α, β, γ, θ and M B , T k The specific values ​​are shown in Table 1.

[0029] The specific preparation method of ferrite material is as follows:

[0030] (1) Raw material mixing: Calculate the feeding amount of the four main raw materials according to the percentage of unit ferrite content, and use a vibrating mill to mix the four raw materials after weighing, so that the four raw materials are evenly distributed;

[0031] (2) Pre-burning: The mixed raw materials enter the rotary kiln for pre-burning to remove the acid radical ions in the raw materials and partially generate ferrite;

[0032] (3) Sand milling: Add additive combination, pure water, PVA, and defoamer to the pre-b...

Embodiment 6～10

[0045] FeFe in ferrite material 2 o 4 , MnFe 2 o 4 , ZnFe 2 o 4 , Li 0.5 Fe 0.5 Fe 2 o 4 Four unit ferrite content α, β, γ, θ, satisfying 5.172≤M respectively B ≤5.449 and 0.612≤T k ≤0.622, the additive combination is 0.07wt% CaCO 3 , 0.04wt% Nb 2 o 5 , 0.05wt%V 2 o 5 , 0.10wt%TiO 2 , α, β, γ, θ and M B , T k The specific values ​​are shown in Table-3. The preparation process of Examples 6-10 is completely the same as that of Examples 1-5.

[0046] Table 3 embodiment 6~10 and comparative example 5~8 component formula

[0047]

[0048]

Embodiment 11～14

[0055] FeFe in ferrite material 2 o 4 , MnFe 2 o 4 , ZnFe 2 o 4 , Li 0.5 Fe 0.5 Fe 2 o 4 Four unit ferrite content α, β, γ, θ, respectively satisfying 5.097≤M B ≤5.612 and 0.596≤T k ≤0.630, the additive combination is 0.07wt% CaCO 3 , 0.04wt%Nb 2 o 5 , 0.05wt%V 2 o 5 , 0.10wt%TiO 2 , α, β, γ, θ and M B , T k The specific values ​​are shown in Table-5. The preparation process of Examples 11-14 is exactly the same as that of Examples 1-5.

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Abstract

The invention discloses an ultrahigh-Bs low-loss manganese-zinc ferrite material; the ferrite material is calculated according to the content percentage of four ferrite units, namely FeF2O4, MnF2O4, ZnF2O4 and Li0.5Fe0.5F2O4, namely alpha, beta, gamma and theta, wherein alpha+beta+gamma+theta is equal to 1, the magnetic moment coefficient MB is equal to 5*(+gamma)-alpha-5*[theta], and MB is more than or equal to 5.097 and less than or equal to 5.612. The invention relates to a preparation method of an ultrahigh-Bs low-loss manganese-zinc ferrite material. The preparation method comprises the following steps: (1) mixing raw materials; (2) presintering; (3) sanding; (4) spray granulation; and (5) pressing the powder subjected to spray granulation into a green body by using a forming machine, sintering in a bell top kiln at the temperature of 1340 DEG C-1370 DEG C, setting the atmosphere by using an equilibrium equation in the cooling process, and cooling to obtain the soft magnetic ferrite material. According to the ultrahigh-Bs low-loss manganese-zinc ferrite material prepared by the design method and the manufacturing process disclosed by the invention, the Bs reaches 490 mT at the temperature of 100 DEG C, meanwhile, the ultrahigh-Bs low-loss manganese-zinc ferrite material has quite low power loss at the high temperature of 100 DEG C, the power loss of the ultrahigh-Bs low-loss manganese-zinc ferrite material under the test condition of 100 kHz / 200 mT is about 800 kW / m<3>, and the Curie temperature Tc is greater than 310 DEG C.

Description

technical field [0001] The invention relates to the technical field of manganese-zinc ferrite materials, in particular to ultra-high B s Low loss manganese zinc ferrite material and preparation method thereof. Background technique [0002] In electronic products, magnetic components including transformers and inductors occupy 20% to 30% of the volume of the power supply and 30% to 40% of the weight of the power supply, which is one of the key factors restricting the miniaturization and weight reduction of electronic products. To realize the miniaturization and light weight of electronic products, magnetic components are required to have greater output power and better high temperature stability. As the most widely used manganese zinc ferrite material in switching power supply systems, its performance have a very important impact on this. Improve the saturation magnetic flux density B of manganese zinc ferrite materials at high temperature s , is an important method to ach...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622H01F1/34H01F41/02
CPCC04B35/2616C04B35/622H01F1/344H01F41/02C04B2235/3208C04B2235/3251C04B2235/3232C04B2235/3239C04B2235/3262C04B2235/3284
Inventor 王微达李明治李永劬谈海烽范祥法
Owner 海宁辉恒磁业有限公司