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Magnesium-zine-series ferrite and preparing method

A ferrite and magnesium-zinc technology is applied in the field of preparation of magnesium-zinc ferrites, which can solve the problems of high sintering temperature, poor tin immersion performance at high temperature, and defects in use, and achieves low sintering temperature, low cost, and high compatibility. than reasonable effect

Inactive Publication Date: 2006-08-09
RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The materials disclosed in the above-mentioned patent application documents are mainly used in electromagnetic wave absorption and deflection devices. If the magnetic cores used for inductive components such as transformers, inductors, filters and electromagnetic coils are made, the sintering temperature is high and the high-temperature immersion tin performance is poor. flawed use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Shanghai Baosteel Fe 3 o 4 49.8mol%, Zhongsui MgO 24.4mol%, Shanghai Jinghua ZnO25.8mol%, added as the main component, adding 3.4wt% CuO, 0.8% MnCO 3 . The above-mentioned main components and auxiliary components are mixed and ground; pre-fired in an air kiln, the pre-fired holding temperature is 960°C±10°C, and the holding time is 2 hours; the pre-fired powder and binder such as polyvinyl alcohol , dispersant, defoamer and other auxiliary materials are mixed and sand milled, spray granulated, and the average particle size Φ is controlled to be 80 μm to 300 μm; the granular material is pressed into a ring magnetic core of H25mm×15mm×7.5mm, pressed and cut DR8mm ×10mm I-shaped magnetic core. Heat up the above magnetic core gradually in an air kiln, keep it warm at 1100℃±10℃ for 3.5 hours, then gradually cool it down, the magnetic core number is N1.

Embodiment 2

[0024] Shanghai Baosteel Fe 3 o 4 50.5mol%, Zhongsui MgO 23.4mol%, Shanghai Jinghua ZnO 26.1mol%, added as the main component, added 4.1wt% CuO, 0.4% MnCO 3 , adding other subcomponents 0.004wt% Co 2 o 3 , 0.003V 2 o 5 . The above-mentioned main components and auxiliary components are mixed and ground; pre-fired in an air kiln, the pre-fired holding temperature is 940°C±10°C, and the holding time is 2.5 hours; the pre-fired powder and binder such as polyvinyl alcohol , dispersant, defoamer and other auxiliary materials are mixed and sand milled, spray granulated, and the average particle size Φ is controlled to be 80 μm to 300 μm; the granular material is pressed into a ring magnetic core of H25mm×15mm×7.5mm, pressed and cut DR8mm ×10mm I-shaped magnetic core. Raise the temperature of the above magnetic core gradually in an air kiln, keep it warm at 1120°C±10°C for 3 hours, and then gradually cool it down. The magnetic core number is N2.

Embodiment 3

[0026] Shanghai Baosteel Fe 3 o 4 51.3mol%, Zhongsui MgO 24.0mol%, Shanghai Jinghua ZnO 24.7mol%, added as the main component, added 4.1wt% CuO, 0.3% MnCO 3 , adding other subcomponents 0.002wt% Co 2 o 3 , 0.003V 2 o 5. The above-mentioned main components and auxiliary components are mixed and ground; pre-fired in an air kiln, the pre-fired holding temperature is 920°C±10°C, and the holding time is 3 hours; the pre-fired powder and binder such as polyvinyl alcohol , dispersant, defoamer and other auxiliary materials are mixed and sand milled, spray granulated, and the average particle size Φ is controlled to be 80 μm to 300 μm; the granular material is pressed into a ring magnetic core of H25mm×15mm×7.5mm, pressed and cut DR8mm ×10mm I-shaped magnetic core. Raise the temperature of the above magnetic core gradually in an air kiln, keep it warm at 1150°C±10°C for 2.5 hours, and then gradually cool it down. The magnetic core number is N3.

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Abstract

This invention relates to a ferrite of Mg-Zn series and its preparation method including a primary composition and a sub-composition, in which, said primary composition includes Fe2O3, ZnO and MgO in the following mol percentages: Fe203: 47.5mol%-52.3mol%, ZnO: 23mol%-27mol%, MgO:21mol-25.8mol%, said sub-composition includes Mn oxide and Cu oxide, which provides a ferrite of Mg-Zn series similar to that of Ni-Zn series having strong wicking and anti-cracking performance and suitable for IF and HF transformers, inductors and filters.

Description

【Technical field】 [0001] The invention relates to a magnesium-zinc ferrite with low preparation cost and suitable for medium and high-frequency transformers, inductors, filters, electromagnetic coils and other devices, and a preparation method of the magnesium-zinc ferrite. 【Background technique】 [0002] With the rapid development of information industry technology, the manufacturing technology of electronic equipment is constantly improving and updating. The demand for nickel-zinc ferrite is increasing day by day. As a strategic material, nickel is a precious and rare metal. In recent years, this kind of rare Metal prices have skyrocketed, leading to an increase in the cost of nickel-zinc ferrite. The production and sintering process of magnesium-zinc soft magnetic ferrite is similar to that of nickel-zinc ferrite. It is suitable for the magnetic core of transformers, inductors, filters, electromagnetic coils and other inductive components in the medium and high frequency ...

Claims

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Application Information

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IPC IPC(8): C22C29/12C22C1/04
Inventor 刘成飞孙明孟墙
Owner RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
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