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 specific loss, achieve high Curie temperature, simple preparation process and low specific temperature The effect of coefficients

Active Publication Date: 2012-09-26
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, the specific loss of the above materials is relatively large when the frequency is 3MHz ~ 10MHz

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

[0046] 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: 0.2wt%, Bi 2 o 3 : 0.2wt%, Co 2 o 3 : 0.3wt%, V 2 o 5 : 0.05wt%, ZrO 2 : 0.05wt%, SiO 2 : 0.1wt%, TiO 2 : 0.01wt%, Nb 2 o 5 : 0.02wt%, secondary component manganese oxide MnO with 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. According to the weight of the calcined powder, add 0.2wt% n-zinc alcohol to the calcined powder for sand grinding, discharge and stir and add 0.8wt% binder polyvinyl alcohol, and spray dry to obtain the average particle size In 200μm pellets. According to the weight of the pellets, add 0.0...

Embodiment 2

[0052] The preparation process of the magnetic core is the same as that of Example 1. Only Fe in the main ingredient formula 2 o 3 , NiO, ZnO, CuO content fixed at 48.5mol% Fe 2 o 3 , 15.5 mol% NiO, 30 mol% ZnO and 6 mol% CuO. The contents of subcomponents are shown in Table 2.

[0053] Table 2

[0054]

[0055]

[0056] table 3

[0057]

[0058] It can be seen from Table 2 and Table 3 that when the content of the auxiliary components is within the scope of the present invention, the specific loss of the magnetic core is low, and the saturation magnetic flux density at 25°C is above 320mT; the specific loss at 1MH tanδ / μi-6 、Specific loss tanδ / μi-6 ;Surface resistance R>10 9 Ω, Curie temperature Tc>150°C. When the content of subcomponents deviates from the scope of the present invention, there will be one or several performance indicators among the magnetic permeability μi, saturation magnetic flux density Bs, tanδ / μi, αμr, and surface resistance R.

Embodiment 3

[0060] The composition of the magnetic core is the same as that of test number 102#, and the preparation process is the same as that of Example 1. Only the sintering temperature is shown in Table 4.

[0061] Table 4

[0062]

[0063] It can be seen from Table 4 that when the sintering temperature is 1050-1150°C, the performance indicators of the magnetic core are better, and the temperature is lower when sintering at 1030°C, resulting in magnetic permeability μi, saturation magnetic induction Bs, 5MHz The lower tanδ / μi and other characteristics become worse.

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Abstract

The invention belongs to the field of soft magnets, and particularly provides a soft-magnetic nickel-copper-zinc ferrite material which comprises major components and minor components, wherein the major components comprise the following components in percentage by mol: 46.5-50.0 mol% of Fe2O3, 12.0-17.0 mol% of NiO, 27.0-31.0 mol% of ZnO and 4.0-8.0 mol% of CuO; and the minor components comprise manganese oxide and bismuth oxide, wherein on the basis of the total weight of the major components, the total weight percent of the minor components and standard substances thereof MnO and Bi2O3 is 0.1-1.0 wt%. Under the wide frequency of 50 KHz-10 MHz and especially high frequency of 1 MHz-10 MHz, the material provided by the invention has the characteristics of high magnetic conductivity (mu i is approximately equal to 300, and f is equal to 1 MHz), high resistivity, low specific loss, low specific temperature coefficient and the like.

Description

technical field [0001] The invention belongs to the 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] With the rapid development of information industry, communication electronics, automotive electronics, test instruments, household appliances and other industries, electronic equipment is developing in the direction of miniaturization, integration, and high frequency; the demand for low-loss nickel-copper-zinc soft ferrite materials The amount is increasing day by day. Various soft magnetic material manufacturers at home and abroad have developed a series of nickel-copper-zinc soft magnetic ferrite materials with a magnetic permeability ranging from 10 to 2500, and the application frequency has expanded from a few KHz to thousands of MHz. [0003] The following table shows the material grades and performance indicators of the main domestic and foreign...

Claims

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Application Information

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