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Magnetic core with low loss and sintering process thereof

A low-loss, magnetic core technology, applied in transformer/inductor magnetic core, inorganic material magnetism, inductor/transformer/magnet manufacturing, etc., can solve high power consumption, difficult temperature range adjustment, and distribution range of the lowest temperature point of power consumption Narrow problems, to achieve the effect of low power consumption, wide distribution range of the lowest temperature point, and easy adjustment of temperature range

Active Publication Date: 2013-07-10
JIANGSUSR MAGNETIC MATERIAL & DEVICE ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the magnetic core sintering process in the prior art has at least the defects of high power consumption, narrow distribution range of the lowest temperature point (valley point) of power consumption, and difficult adjustment of temperature range

Method used

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  • Magnetic core with low loss and sintering process thereof
  • Magnetic core with low loss and sintering process thereof

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Embodiment 1

[0019] According to an embodiment of the present invention, a low-loss magnetic core and a sintering process thereof are provided. Wherein, the low-loss magnetic core includes the main ingredients of the following components and mole percentages:

[0020] Fe 2 O 3 : 51mol%;

[0021] MnO: 38mol%;

[0022] ZnO: balance.

[0023] In the above embodiment, the above-mentioned low-loss magnetic core may also include the following components and weight percentages of auxiliary materials:

[0024] CaCO 3 : 0.02wt%;

[0025] V 2 O 5 : 0.04wt%;

[0026] SnO 2 : 0.02wt%;

[0027] Nb 2 O 5 : 0.04wt%.

[0028] Further, in the above-mentioned embodiment, in the sintering process of the above-mentioned low-loss magnetic core, it includes: in the heating-up stage of the kiln, when the temperature of the kiln reaches 900°C, prolong the holding time by 0.8h, and increase the amount of nitrogen gas entering at the same time about 8m 3 / h, in order to reduce the oxygen content in ...

Embodiment 2

[0034] Different from the above-mentioned embodiments, in this embodiment, the low-loss magnetic core includes the following components and mole percentages of main materials:

[0035] Fe 2 O 3 : 54mol%;

[0036] MnO: 33mol%;

[0037] ZnO: balance.

[0038] In the above embodiment, the above-mentioned low-loss magnetic core may also include the following components and weight percentages of auxiliary materials:

[0039] CaCO 3 : 0.06wt%;

[0040] V 2 O 5 : 0.02wt%;

[0041] SnO 2 : 0.01wt%;

[0042] Nb 2 O 5 : 0.06wt%.

[0043] Further, in the above-mentioned embodiment, in the sintering process of the above-mentioned low-loss magnetic core, it includes: in the heating-up stage of the kiln, when the temperature of the kiln reaches 1000°C, prolong the holding time for 1.0h, and at the same time increase the amount of nitrogen entering 6m 3 / h.

Embodiment 3

[0045] Different from the above-mentioned embodiments, in this embodiment, the low-loss magnetic core includes the following components and mole percentages of main materials:

[0046] Fe 2 O 3 : 52.5mol%;

[0047] MnO: 35.5mol%;

[0048] ZnO: balance.

[0049] In the above embodiment, the above-mentioned low-loss magnetic core may also include the following components and weight percentages of auxiliary materials:

[0050] CaCO 3 : 0.04wt%;

[0051] V 2 O 5 : 0.03wt%;

[0052] SnO 2 : 0.03wt%;

[0053] Nb 2 O 5 : 0.02wt%.

[0054]Further, in the above-mentioned embodiment, the sintering process of the above-mentioned low-loss magnetic core includes: in the heating stage of the kiln, when the temperature of the kiln reaches 1100°C, the holding time is extended by 1.2h, and the amount of nitrogen entering is increased at the same time. 10m 3 / h.

[0055] Specifically, in the above-mentioned embodiments, through the research and bold test of the sintering process...

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Abstract

The invention discloses a magnetic core with low loss and a sintering process thereof. The magnetic core with the low loss comprises the following main materials: 51 to 54 molar percent of Fe2O3, 33 to 38 molar percent of MnO and the balance of ZnO. The sintering process for the magnetic core with the low loss comprises the following steps of: in the temperature-rise period of a furnace, when thetemperature of the furnace is between 900 and 1,100 DEG C, prolonging the heat preserving time to about 0.8 to 1.2 hours in the temperature-rise period of the temperature; meanwhile, increasing the permissible quantity of nitrogen to about 8m<3> / h. The magnetic core with the low loss and the sintering process thereof can overcome the defects of high power consumption, narrow distribution range ofpower consumption minimum temperature points (valley points), difficult adjustment of the power consumption minimum temperature points and the like, and have the advantages of implementation of low power consumption, wide distribution range of the power consumption minimum temperature points (the valley points) and easy adjustment of the temperature range.

Description

technical field [0001] The invention relates to the manufacturing technology of manganese zinc ferrite magnetic material, in particular to a low-loss magnetic core and its sintering process. Background technique [0002] At present, in the design of transformers, it is required that the power loss Pcv of power materials should be low and the saturation magnetic induction Bs should be high. In actual production, a key link to control these two parameters is the sintering process, that is, the grain growth of the sintered product is required to be fast, the microstructure single-domain grains should be fine and dense, and the cation and crystal point defects should be controlled in the crystal position. the overall distribution of . [0003] Generally, during the sintering process of the kiln, the heating rate is directly related to the density, grain size and uniformity of the ferrite product. If the heating rate is too fast, the grain size will be uneven and there will be m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/36H01F27/24H01F41/02C04B35/26C04B35/64
Inventor 刘洪建
Owner JIANGSUSR MAGNETIC MATERIAL & DEVICE ENG TECH RES