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A kind of iron powder core and preparation method thereof

An iron powder core and pure iron powder technology, which is applied in the field of powder metallurgy to prepare iron powder cores, can solve the problems of reducing the service life of iron powder cores, reducing the quality factor of inductance, and increasing the loss of magnetic cores, so as to improve the powder output rate , Improve corrosion resistance, good product performance

Active Publication Date: 2018-03-06
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The iron powder core is suitable for the temperature range of -60°C to 125°C. When the core is in a higher temperature environment, the quality factor (Q) of the inductor will be permanently reduced, which is due to the use of organic materials in the manufacturing process. Adhesives, such as epoxy resin, etc., when the temperature exceeds 150 ° C, the resin inside the material will deteriorate, which will increase the loss of the magnetic core and reduce the service life of the iron powder core

Method used

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  • A kind of iron powder core and preparation method thereof
  • A kind of iron powder core and preparation method thereof
  • A kind of iron powder core and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0038] 1. Raw material formula: The total mass ratio of raw materials is: chromium 5%, manganese zinc ferrite 5%, pure iron powder 90%. The purity is above 99%.

[0039] 2. Preparation method

[0040] (1) Ball milling of raw materials: Weigh 100g of pure iron powder, 10g of chromium, and 10g of manganese-zinc ferrite, and ball mill the iron powder, manganese-zinc ferrite, and chromium in groups. The diameter of the ball milling tank is 10 cm and the volume is about 1L. For tanks, the grinding balls are two kinds of chromium steel balls with a diameter of 10mm and 6mm, and the ratio of the number of balls is 4:1. The powder was put into a ball mill with a ball-to-material ratio of 15:1. At the same time, 0.6% by mass of absolute ethanol was added as a process control agent, and they were placed in the ball mill for 45 hours.

[0041] (2) Raw materials are mixed, respectively weighing 0.5 g of ball-milled chromium powder, 0.5 g of manganese zinc ferrite, and 9 g of pure iron p...

Embodiment 2

[0048] 1. Raw material formula: The total mass ratio of raw materials is: chromium 4%, manganese zinc ferrite 7%, pure iron powder 89%. The purity is above 99%.

[0049] 2. Preparation method

[0050] (1) Ball milling of raw materials: Weigh 100g of pure iron powder, 10g of chromium, and 10g of manganese-zinc ferrite, and ball mill the iron powder, manganese-zinc ferrite, and chromium in groups. The diameter of the ball milling tank is 10 cm and the volume is about 1L. For tanks, the grinding balls are two kinds of chromium steel balls with a diameter of 10mm and 6mm, and the ratio of the number of balls is 3:1. The powder was put into a ball mill with a ball-to-material ratio of 10:1, and 1% by mass of absolute ethanol was added as a process control agent at the same time, and they were placed in the ball mill for 40 hours.

[0051] (2) Raw materials are mixed, respectively weighing 0.5 g of ball-milled chromium powder, 0.8 g of manganese zinc ferrite, and 11 g of pure iron...

Embodiment 3

[0059] 1. Raw material formula: The total mass ratio of raw materials is: chromium 6.5%, manganese zinc ferrite 10%, pure iron powder 83.5%. The purity is above 99%.

[0060] 2. Preparation method

[0061] (1) Ball milling of raw materials: Weigh 100g of pure iron powder, 10g of chromium, and 10g of manganese-zinc ferrite, and ball mill the iron powder, manganese-zinc ferrite, and chromium in groups. The diameter of the ball mill tank is 10 cm and the volume is about 1L. For tanks, the grinding balls are two kinds of chromium steel balls with a diameter of 10mm and 6mm, and the ratio of the number of balls is 4:1. The powder was put into a ball mill with a ball-to-material ratio of 12:1. At the same time, 0.8% by mass of absolute ethanol was added as a process control agent, and they were placed in the ball mill for 42 hours.

[0062] (2) Mixing of raw materials, weighing 1 g of ball-milled chromium powder, 1.5 g of manganese zinc ferrite, and 12.5 g of pure iron powder acco...

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Abstract

The invention provides an iron powder core and a preparation method thereof, and belongs to the technical field of powder metallurgy. The method comprises the following steps of: (a) separately carrying out ball-milling on pure iron powder, chromium and manganese zinc ferrite for 45 hours; (b) separately weighing the components in percentage by weight: 4%-6.5% of chromium, 5%-10% of manganese zinc ferrite and the balance of reduced iron powder and carrying out dry powder mixing for an hour; (c) pressing and forming the mixed powder in a material testing machine at the pressing pressure of 980MPa and keeping the pressure maintaining time for 5s; and (d) sintering the pressed and formed sample in a vacuum sintering furnace to obtain the iron powder core. The iron powder core has the advantages of low sintering temperature, high yield and low cost, and the obtained product is high in density, high in hardness, good in magnetic property and the like.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to a method for preparing iron powder cores by powder metallurgy. Background technique [0002] Iron powder cores are widely used in energy storage inductors, dimming chokes, EMI noise filters, DC output / input filters, etc. Powdered iron cores are well suited for use in energy storage inductors due to the inherent distributed air gap nature of the powdered iron core. In addition, replacing high flux cores or sendust cores with iron-nickel phase magnetic powder (MPP) with iron powder cores is a cost-effective design. [0003] The iron powder core is suitable for the temperature range of -60°C to 125°C. When the core is in a higher temperature environment, the quality factor (Q) of the inductor will be permanently reduced. This is due to the use of organic Adhesives, such as epoxy resin, etc., when the temperature exceeds 150 ℃, the resin inside the material will deteriora...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/33B22F3/02B22F3/10C22C38/18C22C38/04
CPCB22F3/02B22F3/10B22F2003/023C22C38/002C22C38/04C22C38/18H01F1/33
Inventor 湛永钟黄金芳叶海梅王勇梁江王肖铮罗浩柳帅陈晓娴吴俊彦
Owner GUANGXI UNIV
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