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Soft magnetic NiCuZn ferrite material with characteristics of wide temperature range, low temperature coefficient, high frequency and low loss, and preparation method thereof

A low temperature coefficient, ferrite material technology, applied in the direction of inorganic material magnetism, can solve the problems of small magnetic permeability and difficult linear change of positive value, and achieve the effect of small temperature change, low loss and low temperature coefficient

Active Publication Date: 2014-04-02
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For soft ferrite, it is very difficult to require the magnetic permeability to change little with temperature and to change linearly in positive value.
This requirement cannot be met only by changing the main formula and changing the process conditions

Method used

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  • Soft magnetic NiCuZn ferrite material with characteristics of wide temperature range, low temperature coefficient, high frequency and low loss, and preparation method thereof
  • Soft magnetic NiCuZn ferrite material with characteristics of wide temperature range, low temperature coefficient, high frequency and low loss, and preparation method thereof
  • Soft magnetic NiCuZn ferrite material with characteristics of wide temperature range, low temperature coefficient, high frequency and low loss, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The main components and subcomponents were mixed in predetermined amounts as shown in Table 1.

[0028] The preparation method is:

[0029] a. Primary ball milling: Mix the components of the main component according to the ratio, and pass the obtained mixture through wet primary ball milling. The average particle size of the granular material after the primary ball milling is 0.8-1.5 μm.

[0030] b. Pre-burning: Pre-burn the pellets after the primary ball milling in the air. The pre-burning temperature is controlled at 750°C and kept for 4 hours.

[0031] c. Secondary ball milling: perform wet secondary ball milling on the calcined granules together with the auxiliary components. The average particle size of the granules after the secondary ball milling is 0.8-1.2 μm.

[0032] d. Forming and sintering: dry the granules after secondary ball milling, add a polyvinyl alcohol solution with a concentration of 15wt% of 11wt% of the pre-fired material, mix evenly, spray granu...

Embodiment 2

[0044] The main components and subcomponents were mixed in predetermined amounts as shown in Table 2.

[0045] The preparation method is:

[0046]a. Primary ball milling: Mix the components of the main component according to the ratio, and pass the obtained mixture through wet primary ball milling. The average particle size of the granular material after the primary ball milling is 0.8-1.5 μm.

[0047] b. Pre-burning: Pre-burn the pellets after primary ball milling in the air, the pre-burning temperature is controlled at 1050°C, and the temperature is kept for 0.5 hours.

[0048] c. Secondary ball milling: perform wet secondary ball milling on the calcined granules together with the auxiliary components. The average particle size of the granules after the secondary ball milling is 0.8-1.2 μm.

[0049] d. Molding and sintering: dry the granules after secondary ball milling, add a polyvinyl alcohol solution with a concentration of 10wt% of 13wt% of the weight of pre-fired mater...

Embodiment 3

[0063] The main components and subcomponents were mixed in predetermined amounts as shown in Table 3.

[0064] The preparation method is:

[0065] a. Primary ball milling: Mix the components of the main component according to the ratio, and pass the obtained mixture through wet primary ball milling. The average particle size of the granular material after the primary ball milling is 0.8-1.5 μm.

[0066] b. Pre-burning: Pre-burn the pellets after primary ball milling in the air. The pre-burning temperature is controlled at 910°C and kept for 2.5 hours.

[0067] c. Secondary ball milling: perform wet secondary ball milling on the calcined granules together with the auxiliary components. The average particle size of the granules after the secondary ball milling is 0.8-1.2 μm.

[0068] d. Molding and sintering: dry the granules after secondary ball milling, add a polyvinyl alcohol solution with a concentration of 12wt% of the pre-fired material weight 12wt%, mix evenly, spray gra...

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Abstract

The present invention discloses a soft magnetic NiCuZn ferrite material with characteristics of wide temperature range, low temperature coefficient, high frequency and low loss, and a preparation method thereof. The soft magnetic NiCuZn ferrite material comprises a main component and a sub-component, wherein the main component comprises 51-59 mol% of Fe2O3, 10-22 mol of NiO, 20-35 mol% of ZnO, and 0.3-8 mol% of CuO, and the sub-component comprises (by the total weight of the main component) two or more than two components selected from 0.05-1.0 wt% of Mn3O4, 0.05-0.9 wt% of SiO2, 0.01-0.5 wt% of Bi2O3, 0.01-0.8 wt% of TiO2, 0.01-0.6 wt% of CaCO3, and 0.01-0.3 wt% of Co2O3. The soft magnetic NiCuZn ferrite material can be used in the wide temperature range of -40 to 120 DEG C, and has characteristics of low temperature coefficient, low magnetic permeability change along with temperature change, and low loss.

Description

technical field [0001] The invention relates to a soft magnetic NiCuZn ferrite material, in particular to a wide temperature, low temperature coefficient, high frequency and low loss soft magnetic NiCuZn ferrite material and a preparation method thereof. Background technique [0002] The crystal of NiCuZn ferrite material is a porous spinel structure, which has the following main characteristics: (1) excellent high-frequency characteristics; (2) good temperature stability; (3) large nonlinearity; (4) Diversity of formulations; (5) The manufacturing process is simple and stable. Therefore, it is widely used as high-frequency antenna, high-frequency inductor core, filter core, transformer and magnetic amplifier core, etc. [0003] The LC filter for high-frequency communication requires that the inductance coil has a positive temperature coefficient and the capacitor has a negative temperature coefficient to match, so as to obtain a temperature coefficient of zero. Change the...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/34
Inventor 陈军林陈新彬蒋玉梅
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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