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High-permeability manganese zinc ferrite material for automotive electronics and preparation method of material

A technology of magnetic permeability manganese-zinc and ferrite materials, which is applied in the field of high-permeability manganese-zinc ferrite materials for automotive electronics and its preparation, can solve the problem that the temperature stability of the magnetic permeability is not ideal and the temperature of the device changes. Unstable performance and other problems, to achieve the effect of good consistency, good stability and stable material performance

Active Publication Date: 2017-05-31
TDG HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the ZL200910308782.4 patent material solves the problem of low Curie temperature, when the magnetic permeability at room temperature is greater than 9000, the temperature stability of the magnetic permeability of the material in the range of 25°C to 100°C is not ideal. The performance of the device is not stable with the change of temperature

Method used

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  • High-permeability manganese zinc ferrite material for automotive electronics and preparation method of material
  • High-permeability manganese zinc ferrite material for automotive electronics and preparation method of material
  • High-permeability manganese zinc ferrite material for automotive electronics and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation method of the first high magnetic permeability MnZn ferrite material for automotive electronics, the specific steps are as follows:

[0046] 1) Ingredients: the main component is 52.74mol% Fe 2 o 3 , 20.29mol% ZnO, and the rest are MnO; calculate the quality of the required raw materials according to the total set mass, the corresponding molar ratio and the purity of each raw material, and MnO will be converted into MnO 3 o 4 The quality of each raw material is weighed, and then 0.08wt% CuO auxiliary material is weighed according to the total set mass;

[0047] 2) Mixing: Use a vibration mill to mix the raw and auxiliary materials in step 1) for 30 minutes;

[0048] 3) Pre-sintering: Pre-sinter the raw materials mixed in step 2) in a box furnace or a rotary kiln at 880°C for 2 hours;

[0049] 4) Pulverization: Add 0.05wt% CaCO to the calcined material produced in step 3) 3 , 0.02wt%Ta 2 o 5 , 0.02wt%In 2 o 3 , 0.01wt%Bi 2 o 3 After the auxilia...

Embodiment 2

[0080] The preparation method of the second kind of high magnetic permeability MnZn ferrite material for automotive electronics, the specific steps are as follows:

[0081] 1) Ingredients: the main component is 52.7mol% Fe 2 o 3 , 19.3mol% of ZnO, and the rest is MnO; calculate the quality of the required raw materials according to the total set mass, the corresponding molar ratio and the purity of each raw material, and MnO will be converted into Mn 3 o 4 The quality of each raw material is weighed, and then 0.06wt% CuO auxiliary material is weighed according to the total set mass;

[0082] 2) Mixing: Use a vibration mill to mix the raw and auxiliary materials in step 1) for 30 minutes;

[0083] 3) Pre-sintering: Pre-sinter the raw materials mixed in step 2) at 900°C for 2 hours in a box furnace or a rotary kiln;

[0084] 4) Pulverization: Add 0.06wt% CaCO to the calcined material produced in step 3) 3 , 0.02wt%Ta 2 o 5 , 0.02wt%In 2 o 3 , 0.02wt%Bi 2 o 3 After the...

Embodiment 3

[0115] The preparation method of the third kind of high magnetic permeability MnZn ferrite material for automotive electronics, the specific steps are as follows:

[0116] 1) Ingredients: the main component is 52.66mol% Fe 2 o 3 , 18.3mol% of ZnO, and the rest is MnO; calculate the quality of the required raw materials according to the total set mass, the corresponding molar ratio and the purity of each raw material, and MnO will be converted into Mn 3 o 4 The quality of each raw material is weighed, and then 0.04wt% CuO auxiliary material is weighed according to the total set mass;

[0117] 2) Mixing: Use a vibration mill to mix the raw and auxiliary materials in step 1) for 30 minutes;

[0118] 3) Pre-sintering: Pre-sinter the raw materials mixed in step 2) in a box furnace or a rotary kiln at 950°C for 2 hours;

[0119] 4) Pulverization: add 0.07wt% CaCO to the calcined material produced in step 3) 3 , 0.02wt%Ta 2 o 5 , 0.01wt%In 2 o 3 , 0.02wt%Bi 2 o 3 After the...

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Abstract

The invention discloses a high-permeability manganese zinc ferrite material for automotive electronics and a preparation method of the material. A main phase of the high-permeability manganese zinc ferrite material is of a spinel structure, main components of raw materials of the high-permeability manganese zinc ferrite material comprise 52.0-53.0mol% of Fe2O3, 17.0-20.5mol% of ZnO and the rest MnO, and the auxiliary materials comprise analytically pure CuO, CaCO3, Ta2O5, In2O3 and Bi2O3. The content of ZnO and CuO correspondingly increases when the content of Fe2O3 increases. A preparation process of the high-permeability manganese zinc ferrite material includes the steps: (1) distributing; (2) mixing; (3) pre-sintering; (4) crushing; (5) pelleting; (6) forming in a pressing manner; (7) sintering. The high-permeability manganese zinc ferrite material effectively overcomes the shortcomings that a traditional process is low in insulation resistance and voltage resistance, uneven and incompact in cladding layer and the like. The insulation resistance of a metal soft magnetic material of high insulation resistance FeSiCr manufactured by the preparation method is larger than 1G ohms, voltage resistance is larger than 100V, and magnetic permeability is 60 (1+20%).

Description

technical field [0001] The invention relates to a soft ferrite magnetic material with a spinel structure and a preparation method thereof, which is applied to automotive electronics or conventional anti-EMI common-mode filters, in particular to a high-permeability manganese-zinc-ferrite used in automotive electronics Bulk materials and their preparation methods. Background technique [0002] At present, with the continuous development of automotive electronics towards high frequency, the problem of electromagnetic interference (EMI) is also becoming more and more prominent. Power supply noise is a type of electromagnetic interference (EMI), and the spectrum of its conducted noise is roughly 10kHz to 30MHz, up to 150MHz. For this situation of automotive electronics, relevant international standards have formulated corresponding control requirements, and the frequency range of conducted EMI control for power ports and signal ports is 10kHz to 108MHz. Under the requirements o...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/626C04B35/64
CPCC04B35/265C04B35/2658C04B35/62615C04B35/62645C04B35/62695C04B35/64C04B2235/3251C04B2235/3281C04B2235/3286C04B2235/3298C04B2235/442C04B2235/608C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/96
Inventor 李银传李小龙王鑫顾立波
Owner TDG HLDG CO LTD
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