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Low-temperature sintering high performance soft magnetic ferrite material and manufacturing method

A ferrite material, low-temperature sintering technology, applied in the direction of inorganic material magnetism, etc., can solve the problems of large power consumption and N2 gas consumption

Inactive Publication Date: 2009-12-02
SHANDONG ZHONGRUI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, since MnZn ferrite needs to be sintered at high temperature, usually the sintering temperature is 1330-1400°C, the holding time is 4-8 hours, the sintering cycle is as long as 26-36 hours, and it also needs to be sintered under the protection of N2 gas. It needs to consume a lot of electricity and N2 gas

Method used

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  • Low-temperature sintering high performance soft magnetic ferrite material and manufacturing method

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Embodiment 1

[0021] According to the following formula: Fe 2 o 3 : 53.1mol%, ZnO: 11.2mol%, MnO: 35.7mol% (the raw material form is Mn 3 o 4 ) to weigh raw materials; put them into a sand mill pre-added with deionized water to grind, control the average particle size to 0.5±0.1μm, and after one spray granulation, pre-fire with an electric rotary kiln at a temperature of 850±30°C. Then the pre-fired material is put into a sand mill for secondary sand grinding. During the sand grinding process, 45% of pure water, 0.008% of dispersant and 0.005% of defoamer are added relative to the content of the main component, and the additive CaO: 0.045wt% is added. , SiO 2 : 0.008wt%, zinc metaborate: 0.025wt%. The average particle size of the controlled sand mill is 1.0±0.2μm. Finally, secondary spraying is carried out to obtain MnZn ferrite particle powder. Take the pellets and press them into φ25mm×φ15mm×7.5mm, the density is about 3.0±0.2g / cm 3 Put the ferrite blank into a bell furnace, and si...

Embodiment 2

[0023] According to the following formula: Fe 2 o 3 : 53.1mol%, ZnO: 11.2mol%, MnO: 35.7mol% (the raw material form is Mn 3 o 4) to weigh raw materials; put them into a sand mill pre-added with deionized water to grind, control the average particle size to 0.5±0.1μm, and after one spray granulation, pre-fire with an electric rotary kiln at a temperature of 850±30°C. Then the pre-fired material is put into a sand mill for secondary sand grinding. During the sand grinding process, 45% of pure water, 0.008% of dispersant and 0.005% of defoamer are added relative to the content of the main component, and the additive CaO: 0.045wt% is added. , SiO 2 : 0.008wt%, zinc metaborate: 0.03wt%. The average particle size of the controlled sand mill is 1.0±0.2μm. Finally, secondary spraying is carried out to obtain MnZn ferrite particle powder. Take the pellets and press them into φ25mm×φ15mm×7.5mm, the density is about 3.0±0.2g / cm 3 Put the ferrite blank into a bell furnace, and sint...

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Abstract

The invention relates to a low-temperature sintering high performance MnZn power ferrite material, which comprises the following main components: 49.5 to 56.5mol percent of Fe2O3, 6.5 to 16 mol percent of ZnO and 29.5 to 41 mol percent of auxiliary element; the auxiliary element comprises calcium oxide, silicon dioxide and zinc metaborate, and the total addition amount is 0.01 to 0.25 weight percent of that of the main components. A manufacturing method comprises the following steps: putting the components into a sand mill pre-added with deionized water for grinding; controlling the average grain diameter to 0.5+ / -0.1 mu m; after the first spraying and prilling, presintering the obtained mixture in an electrothermal rotary kiln at a temperature of 850+ / -30 DEG C; putting the presintered materials into the sand mill for the second sand grind, and adding additives, namely the calcium oxide, the silicon dioxide and the zinc metaborate; performing the secondary spraying to obtain MnZn ferrite particle material powder; and molding and pressing the particle material into a blank and sintering the blank for 2 to 5 hours at a temperature of 1,150+ / -50 DEG C.

Description

technical field [0001] The invention relates to a low-temperature sintered high-performance MnZn low-power ferrite material and a manufacturing method. Background technique [0002] With the rapid development of the world electronics market, due to the special electromagnetic properties of ferrite materials, such as: high resistivity, excellent high-frequency characteristics, etc., various electronic components made of ferrite cores, including high-frequency Magnetic core electronic devices, such as deflection coils, flyback transformers, ordinary transformers, resolvers, anti-electromagnetic interference transformers, inductors and choke coils, etc. These components are usually used as the work and control core of the system or equipment, and are widely used In: computers, mobile phones, communications, office automation, remote monitoring, audio-visual equipment, household appliances, electromagnetic compatibility, green lighting, and electronic information technology (IT)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34C04B35/26C04B35/64
Inventor 陆明岳
Owner SHANDONG ZHONGRUI ELECTRONICS
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