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NiCuZn soft magnetic ferrite material used for low temperature co-sintering and preparation method thereof

A technology of soft ferrite and low-temperature co-firing, which is applied in the field of soft ferrite materials, can solve problems such as material performance differences, and achieve the effects of good consistency, excellent magnetic properties, and low production costs

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

However, this invention is substantially different from the technical solution of the present invention, and the material properties provided are also very different

Method used

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  • NiCuZn soft magnetic ferrite material used for low temperature co-sintering and preparation method thereof
  • NiCuZn soft magnetic ferrite material used for low temperature co-sintering and preparation method thereof
  • NiCuZn soft magnetic ferrite material used for low temperature co-sintering and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh Fe with the main component content shown in Table 1 2 o 3 , NiO, ZnO and CuO raw materials are dry-mixed and vibrated, and then pre-fired in an air kiln at 800°C for 120 minutes to obtain pre-fired powder after preliminary reaction. Based on the weight of the calcined powder, add an appropriate amount of secondary components to the calcined powder (relative to the total weight of the main component, the weight percentage of the secondary components in terms of their respective standards is: 0.2wt% MnO, 2.5wt% Bi 2 o 3 , 0.5wt% Co 2 o 3 , 0.05wt% V 2 o 5 , 0.1wt% ZrO 2 , 0.2wt% SiO 2 , manganese oxides with Mn 3 o 4 The form of adding), sand milling for 60 minutes, the average particle size of the obtained particles is 7.5 μm, then add 0.8wt% binder polyvinyl alcohol and dry and granulate, the average particle size of the obtained particle powder is 10 μm , water content <0.3wt%, the powder is pressed into a standard ring blank φ25×φ15×5 by tape casting ...

Embodiment 2

[0043] 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 47.5mol% Fe 2 o 3 , 17.5 mol% NiO, 28.0 mol% ZnO and 7.0 mol% CuO. The contents of subcomponents are shown in Table 2.

[0044] Table 2

[0045]

[0046] Continued Table 2

[0047]

[0048] It can be seen from Table 2 that when the content of the auxiliary components is within the scope of the present invention, the performance of the magnetic permeability μi, the saturation magnetic flux density of the magnetic core, the Q value, the specific temperature coefficient αμr, and the Curie temperature Tc is better. When the main formula deviates from the present invention, there is a tendency that the saturation magnetic flux density decreases, the specific temperature coefficient αμr increases, and one or some of the performances of the surface resistance and Q value decrease at the same time.

Embodiment 3

[0050] The composition of the magnetic core is the same as that of test number 104#, and the preparation process is the same as that of Example 1. Only the pre-burning temperature is shown in Table 3.

[0051] table 3

[0052]

[0053] It can be seen from Table 3 that when the burn-in temperature is within the range of the present invention, the magnetic permeability μi, the saturation magnetic flux density of the magnetic core, the Q value, the specific temperature coefficient αμr, and the Curie temperature Tc are better. When it is lower than or higher than 750-850°C, there is a tendency that the saturation magnetic flux density decreases, the specific temperature coefficient αμr increases, and one or some of the surface resistance and Q value tends to decrease at the same time.

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Abstract

The invention belongs to the field of soft magnetic ferrite materials, and in particular, relates to a NiCuZn soft magnetic ferrite material used for low temperature co-sintering. The material comprises major constituents and accessory constituents, wherein: the major constituents consist of ferric oxide, nickel oxide, zinc oxide and copper oxide, the molar percentage content of each major constituent being Fe2O3 45.5-48.5 mol%, NiO 16.5-19.5 mol%, ZnO 28.0-30.5 mol% and CuO 6.0-8.0 mol%; the accessory constituents comprise manganic oxide and bismuth oxide, compared with the gross weight of the major constituents, the weight percentage gross of the accessory constituents being 1.1-3.5 wt% calculated by taking MnO and Bi2O3 as standard. The invention also provides a preparation method for the ferrite material. When used for preparing MLCI devices under high frequency usage, the material of the invention has advantages in that: the material has a relatively low sintering temperature and metallic silver is not easy to diffuse during co-sintering; and the material ensures that the MLCI devices can obtain excellent magnetic properties and have a relatively good consistency.

Description

[0001] technical field [0002] The invention belongs to the field of soft magnetic ferrite materials, in particular to a nickel-copper-zinc soft magnetic ferrite material for low-temperature co-firing and a preparation method thereof. Background technique [0003] With the continuous upgrading of mobile communication technologies such as notebook computers, tablet computers, and smart phones, as well as wired and wireless digital communication networks, electronic products are rapidly developing in the direction of miniaturization and portability. This led to the rise of Surface Mount Technology (SMT). SMC chip components can not only miniaturize electronic products, but also realize high-speed automation of complete machine assembly. With the wide application of chip components, manufacturers hope that all printed circuit boards will use chip components. In the past 20 years, the chip technology of resistors and capacitors among the three major passive components has deve...

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
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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