Nickel zinc ferrite soft magnetic material and preparation method thereof

A technology of nickel-zinc ferrite and soft magnetic materials, applied in the field of magnetic materials, can solve the problems of inability to meet NFC and FRID, etc., and achieve high magnetic permeability, improve magnetic properties, and improve magnetic properties.

Inactive Publication Date: 2014-03-26
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that nickel-zinc ferrite soft magnetic materials with various formulations existing in the prior art are difficult to simultaneously obtain higher magnetic permeability, quality factor and μ'×Q value in the frequency range of 10~100MHZ, resulting in It cannot meet the technical problems of NFC and RFID

Method used

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  • Nickel zinc ferrite soft magnetic material and preparation method thereof
  • Nickel zinc ferrite soft magnetic material and preparation method thereof
  • Nickel zinc ferrite soft magnetic material and preparation method thereof

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preparation example Construction

[0018] The present invention also provides a preparation method of the nickel-zinc ferrite soft magnetic material, comprising the following steps:

[0019] S1. Weigh and mix the raw materials corresponding to the main phase in proportion, sieve after ball milling and drying, and obtain the main phase calcined material after pre-calcination;

[0020] S2. Add the raw materials corresponding to the auxiliary phase in proportion to the main phase calcined material obtained in S1, and sieve after ball milling and drying;

[0021] S3. Molding the mixed system obtained in S2, and transferring it to a furnace for sintering to obtain the nickel-zinc ferrite soft magnetic material.

[0022] In the present invention, when preparing the main phase, the raw materials corresponding to the main phase are mixed first, and then ball milled. The steps and technical parameters of the ball milling are well known to those skilled in the art, and there is no special requirement in the present inve...

Embodiment 1-10

[0029](1) Weigh the raw materials of the main phase according to the main phase formula shown in Table 1, mix them, and then perform ball milling until the average particle size of the system is 160 μm, sieve after drying, and transfer to an air furnace at 850±10°C Calcined for 2 hours to obtain the main phase calcined material.

[0030] (2) Add auxiliary phase raw materials to the main phase pre-fired material according to the auxiliary phase formula shown in Table 1, mix evenly and perform ball milling until the average particle size of the system is 160 μm, sieve after drying, and then add binder PVA to press molding Obtain a green body; transfer the green body into an air furnace, sinter at 950±10°C for 2 hours, and obtain nickel-zinc ferrite soft magnetic materials after cooling, respectively denoted as S1-S10.

[0031] Table 1

[0032]

[0033] Note: The content (mol%) of each component in the main phase formula in Table 1 is calculated based on the total molar conte...

Embodiment 11-15

[0035] The same steps as in Example 1 were used to prepare the main phase calcined material, and then the auxiliary phase raw materials were added according to the auxiliary phase formula shown in Table 2, and ball milling was carried out after mixing evenly until the average particle size of the system was 160 μm. After drying, sieve, Then add binder PVA and press to form a green body; transfer the green body into an air furnace, sinter at 950±10°C for 2 hours, and obtain nickel-zinc ferrite soft magnetic materials after cooling, which are respectively marked as S11-S15.

[0036] Table 2

[0037]

[0038] Note: The content (wt%) of each component in the auxiliary phase formula in Table 2 is based on the total mass content of the nickel-zinc ferrite soft magnetic material; the main phase composition in Table 2 is: Fe 2 o 3 54.3mol%, NiO16.7mol%, ZnO17.7mol%, CuO7.4mol% and MnCO 3 3.8mol%.

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Abstract

The invention provides a nickel zinc ferrite soft magnetic material and a preparation method thereof. The nickel zinc ferrite soft magnetic material contains a main phase and an auxiliary phase, wherein based on the total molar weight of the nickel zinc ferrite soft magnetic material, the main phase contains the following components: 50-55mol% of Fe2O3, 15-25mol% of NiO, 15-25mol% of ZnO, 5-15mol% of CuO and 3-10mol% of MnCO3; based on the total mass of the nickel zinc ferrite soft magnetic material, the auxiliary phase contains the following components: 0.01-0.1wt% of A, 0.001-0.01wt% of B and 0.001-0.01wt% of C; A is one or more of Co2O3,B2O3 and V2O5; B is one or two of La2O3 and Gd2O3; C is one or two of Cr2O3 and Sc2O3. The nickel zinc ferrite soft magnetic material provided by the invention simultaneously has higher magnetic permeability, quality factors and mu'*Q value in the frequency interval of 10-100MHZ and meets the application requirements of NFC (near field communication) and FRID (radio frequency identification).

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and in particular relates to a nickel-zinc ferrite soft magnetic material and a preparation method thereof. Background technique [0002] With the development of the electronic communication industry, some electronic products such as mobile phones have become stronger and more perfect due to their functions (such as mobile payment near field communication, referred to as NFC). Especially in some developed countries abroad, NFC modules have become the factory standard configuration of mobile phones. . In order to meet people's growing demand for more convenient and faster consumption, the research on magnetic chips used for NFC has gradually attracted people's attention and attention. Due to the development of modern electronic products in the direction of small, thin and light, anti-electromagnetic interference magnetic sheets are required to have high magnetic permeability, quality f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/622
Inventor 张慧
Owner BYD CO LTD
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