Soft-magnetic nickel-copper-zinc ferrite material and preparation method thereof

A nickel-copper-zinc ferrite and soft magnetic technology, applied in the field of soft magnetic nickel-copper-zinc ferrite materials and their preparation, can solve problems such as large loss, and achieve the effects of low loss, simple preparation process and high Curie temperature

Active Publication Date: 2013-10-02
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The loss of this material at high frequency (f=13.56MHz) is relatively large, which is substantially different from the present invention

Method used

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  • Soft-magnetic nickel-copper-zinc ferrite material and preparation method thereof
  • Soft-magnetic nickel-copper-zinc ferrite material and preparation method thereof
  • Soft-magnetic nickel-copper-zinc ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh Fe with the main component content shown in Table 1 2 o 3 , NiO, ZnO and CuO raw materials, relative to the total weight of the main components, the weight percentage content of the secondary components in terms of their respective standards is: MnO: 0.30%, Bi 2 o 3 : 0.3%, Co 2 o 3 : 0.5%, Mo 2 o 3 : 0.1%, SiO 2 : 0.2%, subcomponent manganese oxide MnO and Mn 3 o 4 Add in the form of raw materials, mix and vibrate the raw materials of the main component and each auxiliary component, and then pre-fire in an air kiln at 950°C for 120 minutes to obtain pre-fired powder after preliminary reaction. Coarsely crush the calcined powder until the average particle size of the particles is 1-15μm, and then use the casting process to prepare the ferrite blank (thin-film magnetic core, a magnetic core with a length×width×height of 100mm×100mm×0.1mm) , put the blank in an air kiln at 1050° C. for sintering, and the holding time is 120 minutes to obtain the soft magnet...

Embodiment 2

[0040] The preparation process, test instruments and test conditions of the magnetic core are the same as those in Example 1. Only Fe in the main ingredient formula 2 o 3 , NiO, ZnO, CuO content fixed at 48.0mol% Fe 2 o 3 , 17.5 mol% NiO, 28.5 mol% ZnO and 6 mol% CuO. The contents of subcomponents are shown in Table 2. The test results are shown in Table 3.

[0041]

[0042] Table 2

[0043]

[0044] table 3

[0045]

[0046] Note: The test value " / " of μ' in 209 (comparative example) indicates that its value has infinitely tended to 1, so the test value of μ" has no practical significance.

[0047] As can be seen from Table 2 and Table 3, when the content of secondary components is within the scope of the present invention, the complex magnetic permeability μ " is low. The saturation magnetic flux density Bs at 25°C is above 480mT; the magnetic permeability μ at 13.56MHz ′=130±25%, μ″≤4, surface resistance R>10 9 Ω, Curie temperature Tc >250°C. When the conte...

Embodiment 3

[0049] The composition of the magnetic core is the same as that of the test number 102#, and the preparation process, test instruments and test conditions are the same as those in Example 1. Only the sintering temperature is shown in Table 4.

[0050] Table 4

[0051]

[0052] It can be seen from Table 4 that when the sintering temperature is 1050-1100°C, the performance indicators of the magnetic core are better, and the temperature is lower when sintering at 980°C, resulting in the magnetic permeability μ′ and complex magnetic permeability μ ", saturation magnetic flux density Bs, surface resistance R, Curie temperature Tc in one or several performance indicators become worse.

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Abstract

The invention belongs to the field of soft-magnetic ferrite materials. The objective of the invention is to provide a soft-magnetic nickel-copper-zinc ferrite material and a preparation method thereof. The material provided by the invention comprises major components and minor components. The major components comprise the following raw materials in mole percentage: 47.0-49.0mol% of Fe2O3, 17.5-18.5mol% of NiO, 26.0-29mol% of ZnO and 6.0-7.0mol% of CuO. The minor components comprise, based on the total weight of the major components, 0.1-0.40% of MnO, 0.1-0.5% of Bi2O3 and 0.3-0.5% of Co2O3. Under a high frequency of 13.56 MHz, the material provided by the invention has the characteristics of high magnetic conductivity ([mu]' is approximately equal to 130), low complex magnetic permeability [mu]''(namely low loss), high resistivity, high Curie temperature, high saturation magnetic induction density Bs, and the like.

Description

technical field [0001] The invention relates to the technical field of soft magnetic ferrite materials, in particular to a soft magnetic nickel-copper-zinc ferrite material and a preparation method thereof. Background technique [0002] Soft ferrite is based on Fe 2 o 3 Ferrimagnetic oxide as the main component is produced by powder metallurgy. There are several types such as Mn-Zn, Cu-Zn, Ni-Zn, etc. Among them, the output and consumption of Mn-Zn ferrite are the largest, and the resistivity of Mn-Zn ferrite is low, which is 1-10 ohms / meter, generally in Use at frequencies below 100kHZ. The resistivity of Cu-Zn and Ni-Zn ferrite is 102~104 ohm / m, and the loss in the radio frequency band of 100kHz~10 MHz is small, so they are mostly used in radio antenna coils and radio intermediate frequency transformers. [0003] With the rapid development of smart phones, Internet of Things and other industries, mobile phone wireless chargers and wave-absorbing materials on electronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 陈新彬
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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