Production method of manganese-zinc ferrite magnetic core

A technology of manganese zinc ferrite and production method, which is applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, circuit, etc., can solve the problem of poor quality of manganese zinc ferrite core, unreasonable production method and low production efficiency Low-level problems, to achieve the effect of improving the efficiency of green body placement, increasing the loading capacity, and stabilizing product performance

Active Publication Date: 2015-03-04
NANTONG HUAXING MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for the above-mentioned unreasonable production method of the traditional manganese-zinc ferrite core, resulting in low production efficiency, high production cost, and poor quality of the manganese-zinc ferrite core produced. The production method of the manganese-zinc ferrite core has scientific and reasonable steps, which not only improves the production efficiency, but also reduces the production cost. The performance of the manganese-zinc ferrite core prepared by this method is stable

Method used

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  • Production method of manganese-zinc ferrite magnetic core

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Embodiment 1

[0041] This embodiment discloses a production method of a manganese zinc ferrite core, such as figure 1 As shown, the following steps are included: compacting, swinging, sintering heating, sintering heat preservation and sintering cooling, wherein:

[0042] The compact is pressed by conventional pressing equipment, and the components and mass proportions of the green compact are 70% of ferric oxide, 22.4% of manganese oxide, and 7.6% of zinc oxide.

[0043] In this embodiment, the pressed green bodies are automatically stacked and placed in the setter plate through the automatic billet placement machine; the automatic billet placement machine includes: a transmission unit, a pneumatic billet push unit, a workbench and a green body adsorption and placement unit , the feeding end of the transfer unit is connected to the discharge end of the compacting equipment, and the lower end of the transfer unit is provided with a pneumatic push unit capable of pushing the green body to the...

Embodiment 2

[0058] This embodiment discloses a production method of a manganese-zinc ferrite core, which includes the following steps: compacting, laying the blank, sintering temperature rise, sintering heat preservation and sintering temperature reduction, wherein:

[0059] The compact is pressed by conventional pressing equipment, and the components and mass proportions of the green compact are 70% of ferric oxide, 22.4% of manganese oxide, and 7.6% of zinc oxide. The blanks are automatically stacked and placed in the setter plate through an automatic blanking machine. The automatic blanking machine used in this embodiment is the same as that in Example 1;

[0060] Described sintering heating up is subsection heating up, is respectively:

[0061] (1.1) Raise the green body from room temperature to 700°C to remove the binder and moisture in the green body, the heating rate is 2°C / min, and keep it at 450°C for 2 hours, gradually strengthen the ventilation, and force the air flow From 10....

Embodiment 3

[0071] This embodiment discloses a production method of a manganese-zinc ferrite core, which includes the following steps: compacting, laying the blank, sintering temperature rise, sintering heat preservation and sintering temperature reduction, wherein:

[0072] The compact is pressed by conventional pressing equipment, and the components and mass proportions of the green compact are 70% of ferric oxide, 22.4% of manganese oxide, and 7.6% of zinc oxide.

[0073] The blanks are automatically stacked and placed in the setter plate through an automatic blanking machine. The automatic blanking machine used in this embodiment is the same as that in Example 1;

[0074] Described sintering heating up is subsection heating up, is respectively:

[0075] (1.1) Raise the green body from room temperature to 700°C to remove the binder and moisture in the green body, the heating rate is 1.5°C / min, and keep warm at 400°C for 1.5h, keep ventilation, gradually strengthen ventilation, force I...

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Abstract

The invention provides a production method of a manganese-zinc ferrite magnetic core. The production method comprises the following steps: blank pressing, blank placement, sintering heating, sintering heat preservation and sintering cooling, wherein during blank placement, pressed blanks are automatically stacked in a sintering plate by virtue of an automatic blank placement machine; sintering heating is performed stepwise, and is performed respectively at temperature of minus 700 DEG C, 700-1100 DEG C and 1100-1350 DEG C; during sintering heat preservation, heat preservation is performed on the blanks at a temperature of 1350 for 2-6 hours; sintering cooling is performed stepwise and is performed respectively at the temperature of 1350-900 DEG C, 900-200 DEG C and 200-room temperature. The invention also discloses an automatic blank placement machine capable of realizing blank placement. The production method of the manganese-zinc ferrite magnetic core is scientific and reasonable in step, and is capable of improving the production efficiency and also lowering the manufacturing cost. The manganese-zinc ferrite magnetic core prepared by the method is stable in performance.

Description

technical field [0001] The invention relates to magnetic material technology, in particular to a production method of a manganese-zinc ferrite core. Background technique [0002] High-permeability ferrite magnetic powder and magnetic core are essential electronic components for miniaturization and lightening of inductors, filters, pulse transformers and other products in electronic equipment such as program-controlled communication, digital technology, and network communication color TVs. Materials, continuously improving the initial permeability in magnetic materials, has been a research hotspot in this field. [0003] The production of traditional manganese-zinc ferrite cores has the following defects in varying degrees: the pressed green body is placed in the setter plate by manual operation, and the production efficiency is extremely low; The qualified rate of sintering leads to higher production cost per unit magnetic core; in addition, the sintering conditions of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/36C04B35/622C04B35/64
Inventor 蒋庆林李海林
Owner NANTONG HUAXING MAGNETIC MATERIAL
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