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High-Q-value composite soft magnetic materials and preparing method thereof

A composite soft magnetic and alloy powder technology, applied in the direction of inorganic material magnetism, can solve the problems of low Q value, large core heating, low resistivity, etc., and achieve the effect of reducing eddy current loss, low loss and high current, and reducing sintering temperature

Active Publication Date: 2014-12-10
HUBEI RUIYUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using metal soft magnetic to make power inductors, used at 100kHz ~ 1MHz, often due to low resistivity, resulting in low Q value, large loss, large core heating, resulting in deterioration of device performance; using soft ferrite to make For power inductors, often due to the low Bs of the material, the DC bias characteristics of the device are insufficient

Method used

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  • High-Q-value composite soft magnetic materials and preparing method thereof
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  • High-Q-value composite soft magnetic materials and preparing method thereof

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Embodiment Construction

[0031] The present invention will be described below based on specific examples, but the present invention is not limited to these examples.

[0032] A kind of composite soft magnetic material with high Q value, its composition is as follows according to the content of respective standard substance:

[0033] FeSiAl alloy powder 59~74.82wt%, Fe 2 o 3 15.15-23.01wt%, NiO 3.5-5.32wt%, ZnO 3.05-5.11wt%, CuO 0.85-1.85wt%, MgO 1.5-2.35wt%, Li 2 CO 3 0.53~1.13wt%, Co 2 o 3 0.01~0.08wt%, Bi 2 o 3 0.19~0.65wt%, nano Al 2 o 3 0.2~0.75wt%, nano-SiO 2 0.2-0.75wt%.

[0034] Wherein, the average particle diameter of the FeSiAl alloy powder is 3-5 μm, and the FeSiAl alloy powder 2 o 3 , NiO, ZnO, CuO, MgO, Li 2 CO 3 、Co 2 o 3 and Bi 2 o 3 The average particle size is 1-2μm, nano-Al 2 o 3 and nano-SiO 2 The average particle size is 30~50nm

[0035] The high-Q composite soft magnetic material of the present invention is manufactured by an oxide method, and the speci...

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Abstract

The invention discloses high-Q-value composite soft magnetic materials and a preparing method thereof. The composite soft magnetic materials comprise, according to the reference materials thereof by weight, 59%-74.82% of FeSiAl alloy powder, 15.15%-23.01% of Fe2O3, 3.5%-5.32% of NiO, 3.05%-5.11% of ZnO, 0.85%-1.85% of CuO, 1.5%-2.35% of MgO, 0.53%-1.13% of Li2CO3, 0.01%-0.08% of Co2O3, 0.19%-0.65% of Bi2O3, 0.2%-0.75% of nanometer Al2O3 and 0.2%-0.75% of nanometer SiO2. An oxide method is used for preparing, and sintering is carried out under a certain condition. A product obtained after sintering has the advantage that a Q value is high in the frequency range of 100 kHz-1 MHz, and the requirement of low loss of power inductance on soft magnetic materials is met.

Description

technical field [0001] The invention relates to a composite soft magnetic material with high Q value and a preparation method thereof. Background technique [0002] Soft magnetic materials are a large category of magnetic materials, generally divided into metal soft magnetic materials and soft ferrite materials. The Bs of metal soft magnetic materials is high, but the resistivity is low, and the eddy current loss is large; the resistivity of soft ferrite materials is high, generally 10 2 ~10 8 Ω·m, but Bs is low. [0003] Now electronic products are developing in the direction of low loss and high current, which puts forward higher requirements for the performance of soft magnetic materials. The Q value is the quality factor of the inductor, which is the main parameter to measure the inductance device. It refers to the ratio of the inductive reactance presented by the inductor to its equivalent loss resistance when it works under an AC voltage of a certain frequency. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/12H01F1/22C22C1/05C22C30/00C22C32/00C22C33/02C22C38/16
Inventor 王志刚
Owner HUBEI RUIYUAN ELECTRONICS CO LTD