Nickel-zinc ferrite material having high saturation magnetic flux density, high direct current superposition, and high Curie temperature, and preparation method thereof

A nickel-zinc ferrite, high DC superposition technology, applied in the field of electronic equipment and its preparation, can solve the problems of low application frequency and resistivity of magnetic cores, increased volume of inductors, etc., and achieves wide temperature application range, porosity The effect of reducing and stabilizing the DC superposition adaptability

Active Publication Date: 2015-03-11
RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, compared with nickel-zinc ferrite, manganese-zinc ferrite has the characteristics of higher saturation magnetic flux density Bs and higher initial permeability μi. However, because the grain structure of manganese-zinc material is dense, the resistivity is generally at 10 3 Below the order of Ωm, the magnetization process is dominated by domain wall displacement, and domain wall resonance occurs at low frequencies, so the application frequency and resistivity of manganese zinc ferrite cores are low, and electronic equipment is increasingly miniaturized and high frequency Under the trend of the trend, the magnetic core of th

Method used

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  • Nickel-zinc ferrite material having high saturation magnetic flux density, high direct current superposition, and high Curie temperature, and preparation method thereof
  • Nickel-zinc ferrite material having high saturation magnetic flux density, high direct current superposition, and high Curie temperature, and preparation method thereof
  • Nickel-zinc ferrite material having high saturation magnetic flux density, high direct current superposition, and high Curie temperature, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] 1. Ingredients and spray granulation:

[0037] Weigh Fe 2 O 3 : 50.0mo1%; NiO: 26mo1%; ZnO: 20.3mo1%, CuO: 3.7mo1% four kinds of raw materials, then add a certain proportion of deionized water to the sand mill for mixing and crushing, crushing for 30 minutes, and cyclic mixing 10 A certain amount of PVA solution is added in minutes, and spray granulation is performed.

[0038] 2. Burn-in:

[0039] Put the spray material into the pre-burning furnace and keep it at 840°C for 3 hours for pre-burning.

[0040] 3. Secondary sanding:

[0041] Add the following auxiliary components according to the weight percentage of the pre-fired material: 0.03wt% Bi 2 O 3 , 0.02wt%Nb 2 O 5 , 0.05wt% SnO 2 , 0.02wt%V 2 O 5 , 0.014wt%Co 2 O 3 . Then put the powder into a sand mill and add deionized water for secondary sanding. The sanding time is 65 minutes, and the particle size of the powder is controlled at 0.85 to 0.95 μm.

[0042] 4. Spray granulation and molding:

[0043] Add ...

Example Embodiment

[0050] Example 2:

[0051] 1. Ingredients and spray granulation:

[0052] Weigh Fe 2 O 3 : 51.2mo1%; NiO: 25mo1%; ZnO: 19.0mo1%, CuO: 4.8mo1% four raw materials, then add a certain proportion of deionized water to the sand mill for mixing and crushing, crushing for 30 minutes, and cyclically mixing 10 A certain amount of PVA solution is added in minutes, and spray granulation is performed.

[0053] 2. Burn-in:

[0054] Put the spray material into the pre-burning furnace and keep it at 850°C for 3 hours for pre-burning.

[0055] 3. Secondary sanding:

[0056] Add the following auxiliary components according to the weight percentage of the pre-fired material: 0.03wt% Bi 2 O 3 , 0.03wt%Nb 2 O 5 , 0.06wt% SnO 2 , 0.03wt%V 2 O 5 , 0.024wt% Co 2 O 3 . Then put the powder into a sand mill and add deionized water for secondary sanding. The sanding time is 70 minutes, and the particle size of the powder is controlled at 0.85 to 0.95 μm.

[0057] 4. Spray granulation and molding:

[0058] Add a ce...

Example Embodiment

[0065] Example 3:

[0066] 1. Ingredients and spray granulation:

[0067] Weigh Fe 2 O 3 : 48.5mo1%; NiO: 27mo1%; ZnO: 21.5mo1%, CuO: 3mo1% four raw materials, then add a certain proportion of deionized water to the sand mill for mixing and crushing, crushing for 30 minutes, and cyclic mixing for 10 minutes Then add a certain amount of PVA solution for spray granulation.

[0068] 2. Burn-in:

[0069] Put the spray material into a pre-burning furnace and keep it at 860°C for 3 hours for pre-burning.

[0070] 3. Secondary sanding:

[0071] Add the following auxiliary components according to the weight percentage of the pre-fired material: 0.03wt% Bi 2 O 3 , 0.04wt%Nb 2 O 5 , 0.03wt% SnO 2 , 0.05wt%V 2 O 5 , 0.010wt% Co 2 O 3 . Then put the powder into a sand mill and add deionized water for secondary sanding. The sanding time is 60 minutes, and the particle size of the powder is controlled at 0.85 to 0.95 μm.

[0072] 4. Spray granulation and molding:

[0073] Add a certain proportion of P...

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Abstract

The invention relates to a nickel-zinc ferrite material having a high saturation magnetic flux density, high direct current superposition, and high Curie temperature. The material comprises the following main components in percentage by weight: 48 to 52 mol% of Fe2O3, 18 to 22 mol% of ZnO, 25 to 29 mol% of NiO, and the balance being CuO; and also comprises the following auxiliary components in percentage by weight: 0.01 to 0.04 wt% of Bi2O3, 0.01 to 0.05 wt% of Nb2O5, 0.01 to 0.06 wt% of SnO2, and 0.02 to 0.06 wt% of V2O5. The provided nickel-zinc ferrite material is especially suitable for being used under a high and broad frequency and low voltage, has a high saturation magnetic flux density no matter at a high temperature or a low temperature, and is capable of achieving a more stable electrical induction function under a complicated application occasion with a large direct current superposition and high integration level.

Description

technical field [0001] The present invention relates to electronic equipment and its preparation, more specifically, the present invention relates to a magnetic material and its preparation method. Background technique [0002] With the continuous development of social informatization, the demand for high frequency (such as 10KHz-10MHz), high efficiency, and miniaturization of electronic products and devices is increasingly strong, and more and more requirements are put forward for the various performances of high frequency ferrite materials. Come higher requirements: [0003] Generally speaking, soft magnetic ferrite materials mainly include manganese zinc ferrite and nickel zinc ferrite. Among them, compared with nickel-zinc ferrite, manganese-zinc ferrite has the characteristics of higher saturation magnetic flux density Bs and higher initial permeability μi. However, because the grain structure of manganese-zinc material is dense, the resistivity is generally at 10 3 ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 张凯傅膑张冬震李懿轩盘良三刘培元
Owner RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
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