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High-permeability wide-temperature-range power type nickel-zinc LTCF material as well as preparation method and application thereof

A high-permeability, power-type technology, applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of large decrease in magnetic permeability and failure to meet the use requirements

Active Publication Date: 2020-10-20
中国电子科技集团公司第九研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned high magnetic permeability (μ i ≥400) Conventional and wide temperature power nickel-zinc LTCF materials generally have a magnetic permeability (or inductance L)-T curve appears K 1 ≈0 (compensation point) The temperature position of the I peak is between +80 and 100°C, the Curie temperature is low (≤140°C), and the decrease of the magnetic permeability (or inductance L) after the I peak is very large, which cannot be Satisfies the use requirement of low-temperature co-fired materials with high magnetic permeability for chip-based LTCF micro-magnetic transformers, inductance L change rate <20% (compared to normal temperature (20-25°C) at operating temperature (+125-150°C)

Method used

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  • High-permeability wide-temperature-range power type nickel-zinc LTCF material as well as preparation method and application thereof
  • High-permeability wide-temperature-range power type nickel-zinc LTCF material as well as preparation method and application thereof
  • High-permeability wide-temperature-range power type nickel-zinc LTCF material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A high magnetic permeability wide temperature power type nickel-zinc LTCF material, the specific composition percentage is: main component content: NiO 15.50mol%, ZnO 29.50mol%, CuO 7.00mol%, Fe 2 o 3 48.00 mol%,

[0029] The auxiliary component content: MnCO 3 0.40wt%, Bi 2 o 3 0.30wt%;

[0030] The preparation method is as follows:

[0031] First of all, the high-frequency vibrating mixing system is used to effectively improve the mixing uniformity of the oxides of various raw materials, to achieve the effect of high-speed primary crushing, to complete the dry mixing, and to control the mixing time to 55 minutes, and then to further use the sintering kiln for pre-sintering to control the pre-sintering The temperature is 850°C;

[0032] Further, large-flow circulating sand mill wet abrasive (4 hours for primary abrasive, 4.5 hours for secondary fine abrasive) is used to refine powder particles to improve powder activity, reduce reaction activation energy and e...

Embodiment 2

[0041] A high magnetic permeability wide temperature power type nickel-zinc LTCF material, the specific composition percentage is: main component content: NiO 15.00mol%, ZnO 29.00mol%, CuO 6.50mol%, Fe 2 o 3 49.50 mol%,

[0042] The auxiliary component content: MnCO 3 0.30wt%, Bi 2 o 3 0.40wt%.

[0043] The preparation method is as follows:

[0044] First of all, the high-frequency vibrating mixing system is used to effectively improve the mixing uniformity of the oxides of various raw materials, to achieve the effect of high-speed primary crushing, to complete the dry mixing, and to control the mixing time to 45 minutes, and then to further use the sintering kiln for pre-sintering to control the pre-sintering The temperature is 860°C;

[0045] Further, large-flow circulating sand mill wet abrasive (4 hours for primary abrasive, 4.5 hours for secondary fine abrasive) is used to refine powder particles to improve powder activity, reduce reaction activation energy and e...

Embodiment 3

[0048] A high magnetic permeability wide temperature power type nickel-zinc LTCF material, the specific composition percentage is: main component content: NiO 15.80mol%, ZnO 29.40mol%, CuO 6.80mol%, Fe 2 o 3 48.00 mol%,

[0049] The auxiliary component content: MnCO 3 0.35wt%, Bi 2 o 3 0.35wt%.

[0050] The preparation method is as follows:

[0051] First of all, the high-frequency vibrating mixing system is used to effectively improve the mixing uniformity of the oxides of various raw materials, to achieve the effect of high-speed primary crushing, to complete the dry mixing, and control the mixing time to 50 minutes, and then further use the sintering kiln for pre-sintering to control the pre-sintering The temperature is 840°C;

[0052] Further, large-flow circulating sand mill wet abrasive (4 hours for primary abrasive, 4.5 hours for secondary fine abrasive) is used to refine powder particles to improve powder activity, reduce reaction activation energy and effecti...

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Abstract

The invention discloses a nickel-zinc LTCF material with high magnetic conductivity and wide temperature power, which belongs to the technical field of ferrite materials, the raw materials comprise main components and auxiliary components, wherein the content of the main components is as follows: NiO (15-16) mol%, ZnO (29-30) mol%, CuO (6.5-7.5) mol% and Fe2O3 (47-50) mol%, and the content of theauxiliary components is as follows: MnCO3 (0.3-0.5) wt% and Bi2O3 (0.2-0.4) wt%; the material obtained according to the invention has an excellent microstructure after being sintered at about 900 DEGC; the temperature position of the magnetic conductivity (or inductance value L)-T curve with K1 approximately equal to 0 (compensation point) I peak is moved to +125-150 DEG C; the Curie temperatureis high (greater than or equal to 170 DEG C); a flat magnetic conductivity (or inductance value L)-T curve is formed between the peaks I and II; the material is good in temperature stability, and small in magnetic conductivity (or inductance L) drop after I peak value, the application working temperature range can be reliably expanded to -55 DEG C to +150 DEG C, and the use requirement that the inductance L change rate of the GM400 material for the chip LTCF micro-magnetic transformer is smaller than 20% is met.

Description

technical field [0001] The invention relates to the technical field of ferrite materials, in particular to a high magnetic permeability wide temperature power type nickel-zinc LTCF material, its preparation method and application. Background technique [0002] Chip-based LTCF micro-magnetic transformers are mainly used in aviation, aerospace, navigation, land and other weapons and civilian power systems, such as power converters and transformers. [0003] The materials for chip-based LTCF micro-magnetic transformers belong to the field of ferrite materials. Based on low-temperature co-fired ferrite technology (LTCF), the multi-layer chip, small and light weight and integrated functionalization of power magnetic devices can be realized, and the traditional block discrete Power magnetic device size and weight problems, and fundamentally solve the large inductance of chip-based LTCF micro-magnetic transformers and the magnetic performance (permeability μ i Or the inductance L)...

Claims

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Application Information

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IPC IPC(8): C04B35/30H01F1/147H01F41/02C04B35/626C04B35/26
CPCH01F1/14741H01F41/02C04B35/2666C04B35/62605C04B35/6261C04B2235/3281C04B2235/3262C04B2235/3298C04B2235/5436
Inventor 刘兴孙小龙周永川王福海
Owner 中国电子科技集团公司第九研究所
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