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Material for high superposition of manganese-zinc ferrite core and preparation method thereof

A technology of manganese-zinc ferrite and high superposition is applied in the field of materials for high-superposition manganese-zinc ferrite cores and their preparation, and can solve the problem of low magnetic permeability at room temperature, which cannot meet the requirements of superimposed inductance of power transformers, and cannot meet the requirements of superimposed inductance of power transformers. requirements and other issues, to achieve the effect of optimizing the preparation process, reducing industrial processing costs, large-scale production, and high stacking characteristics

Active Publication Date: 2015-03-25
南通三佳磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the high Bs90 material on the market, the room temperature magnetic permeability is low, and it cannot meet the requirements of the superimposed inductance of its power transformer.
[0006] In summary, the original SJ1.8K MnZn ferrite core and 90 MnZn ferrite core on the market can no longer meet the requirements

Method used

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  • Material for high superposition of manganese-zinc ferrite core and preparation method thereof
  • Material for high superposition of manganese-zinc ferrite core and preparation method thereof
  • Material for high superposition of manganese-zinc ferrite core and preparation method thereof

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Embodiment 1

[0030] In order to improve the high stacking and high inductance of the manganese zinc ferrite core, it is necessary to increase the Fe 2 o 3 and ZnO composition content, due to Fe 2 o 3 The increase of the content will greatly improve the power loss. Based on the composition of the SJ1.8K manganese zinc ferrite core, we have determined the main composition of a material for a high stack manganese zinc ferrite core Composition: Fe 2 o 3 53.3mol%, MnO 38.2mol% and ZnO 8.5mol%; the Fe 2 o 3 The purity is above 99.5%, and the specific surface area is 4.0m 2 / g or more; the purity of the MnO is above 99.7%, and the specific surface area is 10-15m 2 / g.

[0031] First, the weight of various raw materials is calculated by converting them into weight percentages; then, the ingredients are weighed to obtain powder; the powder is pressed into a pre-fired furnace to obtain pre-fired materials, among which, The pre-fired temperature is 950°C; after the pre-fired material is vib...

Embodiment 2

[0036] In order to further improve the superimposed inductance of this manganese zinc ferrite core, under the premise that the basic composition of the core remains unchanged, Co 2 o 3 and TiO 2 , the specific method is: a material for high superimposition manganese zinc ferrite core, including the following main components calculated by mole percentage: Fe 2 o 3 53.3mol%, MnO 38.2mol% and ZnO 8.5mol%; the Fe 2 o 3 The purity is above 99.5%, and the specific surface area is 4.0m 2 / g or more; the purity of the MnO is above 99.7%, and the specific surface area is 10-15m 2 / g; further include the following additives calculated in mole percent: Co 2 o 3 0.15mol% and TiO 2 0.1mol%.

[0037] First, the weight of various raw materials is calculated by converting them into weight percentages; then, the ingredients are weighed to obtain powder; the powder is pressed into a pre-fired furnace to obtain pre-fired materials, among which, The calcining temperature is 950°C; af...

Embodiment 3

[0042] Since the Fe in this MnZn ferrite core 2 o 3 content is higher, then add a certain amount of Co 2 o 3 , resulting in an increase in the power consumption of the magnetic core. In order to change this situation, we have added a beneficial impurity to the composition of the magnetic core, CaCO 3 , SiO 2 , Nb 2 o 5 , ZrO 2 , to suppress the excessive growth of grains, improve the resistivity of the magnetic core, and improve the power consumption. The specific method is: a material for a high-layer manganese-zinc ferrite core, including the following main components calculated by molar percentage: Fe 2 o 353.3mol%, MnO 38.2mol% and ZnO 8.5mol%; the Fe 2 o 3 The purity is above 99.5%, and the specific surface area is 4.0m 2 / g or more; the purity of the MnO is above 99.7%, and the specific surface area is 10-15m 2 / g; further include the following additives calculated in mole percent: Co 2 o 3 0.15mol%, TiO 2 0.1mol%, CaCO 3 0.05mol%, SiO 2 0.005mol%, Nb...

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Abstract

The invention belongs to the field of soft magnetic ferrite, and particularly discloses a material for high superposition of a manganese-zinc ferrite core and a preparation method thereof. The material for the high superposition of the manganese-zinc ferrite core comprises the following main components in mol percentage: 53-54mol% of Fe2O3, 37.5-38.5mol% of MnO and 8-10mol% of ZnO. The invention further provides a preparation method of the material for the high superposition of the manganese-zinc ferrite core. By sintering through secondary reduction in a tunnel kiln, the density of the manganese-zinc ferrite core can be up to 4.9g / cm<3>. By adopting the material provided by the invention, the superposition and the inductance of the manganese-zinc ferrite core can be improved, the work efficiency of the can be improved, the production cost can be reduced, and the miniaturization and the high-efficiency operation of the transformer can be realized.

Description

technical field [0001] The invention relates to the field of soft magnetic ferrite materials, in particular to a material for a highly superimposed manganese-zinc ferrite core and a preparation method thereof. Background technique [0002] With the continuous development of electronic transformers, it is becoming more and more obvious that electronic transformers are required to be lightweight, efficient, and energy-saving. As a manufacturer of manganese-zinc ferrite cores, higher requirements are put forward. The original high BS and low power consumption SJ1.8K ( It is equivalent to TDKHV22), which can no longer meet the superposition requirements of power transformers. The superposition test data are shown in Table 1. [0003] Table I [0004] [0005] The room temperature magnetic permeability of high Bs90 materials on the market is relatively low, and it cannot meet the requirements for superimposed inductance of its power transformer. [0006] To sum up, the origi...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622
Inventor 胡惠国
Owner 南通三佳磁业有限公司
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