Noise suppression sheet made from compound material

A technology of noise suppression sheet and composite material, applied in electrical components, magnetic field/electric field shielding, etc., can solve problems such as reducing resonance frequency, occupying circuit area, and reducing system reliability of solder joints

Inactive Publication Date: 2013-09-11
广东领益智造股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of electronic components occupies valuable circuit area, and the increase of solder joints greatly reduces the reliability of the entire system, and the introduction of distributed capacitance and inductance will reduce the resonance frequency, and if the frequency of the circuit continues to increase, these problems will become more and more serious. serious

Method used

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  • Noise suppression sheet made from compound material

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Effect test

preparation example Construction

[0038] Further, the preparation method of the above-mentioned NiZn ferrite includes the following.

[0039] Step 1.1, the Fe 2 o 3 , NiO, CuO, ZnO by weight ratio to Fe 2 o 3 : 62~68wt%, NiO: 4~30wt%, CuO: 3~12wt%, ZnO: 1~22wt%, mixed and stirred into powder.

[0040] Step 1.2, add deionized water of equal mass to the powder obtained in step 1.1, put it into a ball mill jar and mill for 1 to 4 hours, wherein the ratio of the grinding medium to the powder is 4:1 to 5:1 (most Good is 5:1).

[0041] Step 1.3, drying the powder obtained in step 1.2 at a temperature of 100-190°C to remove moisture.

[0042] In step 1.4, put the powder obtained in step 1.3 into a sintering furnace for pre-sintering, wherein the pre-sintering temperature is 900-1000° C., and the pre-sintering time is 1.8-2.5 hours.

[0043] Step 1.5, put the powder obtained in step 1.4 back into the ball mill tank, add deionized water of equal mass, the ratio of grinding medium to powder is 4:1~5:1 (preferably ...

Embodiment 1

[0065] Example 1: The mixing ratio of NiZn ferrite and FeSiAl composite material is 1:4 and the tape casting method is used. The test sample size is 5*5*0.1cm.

Embodiment 2

[0066] Example 2: The mixing ratio of NiZn ferrite and FeSiAl composite material is 1:5, using tape casting method. The test sample size is 5*5*0.1cm.

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Abstract

The invention relates to a noise suppression sheet and relates to a noise suppression sheet made from a compound material of NiZn ferrite and FeSiAl. The noise suppression sheet is synthesized by mixing the NiZn ferrite and the FeSiAl, wherein the mixing proportion of the NiZn ferrite to the FeSiAl is 1 to 4-1 to 5. By utilizing the noise suppression sheet, the frequency band of the noise suppression sheet for suppressing the noise can be wide.

Description

technical field [0001] The invention relates to a noise suppression sheet, in particular to a noise suppression sheet made of NiZn ferrite FeSiAl composite material. Background technique [0002] With the continuous development of circuits towards high frequency, miniaturization and integration, the problem of electromagnetic compatibility is becoming more and more important. At present, capacitors, magnetic beads, and common mode choke coils are widely used to suppress conducted noise in circuits. The use of electronic components occupies valuable circuit area, and the increase of solder joints greatly reduces the reliability of the entire system, and the introduction of distributed capacitance and inductance will reduce the resonance frequency, and if the frequency of the circuit continues to increase, these problems will become more and more serious. serious. [0003] As a result, a new anti-electromagnetic interference method is produced, that is, the use of noise supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/626C08L27/06C08K3/00H05K9/00
Inventor 汪南东颜铄清李启凡董丽冯则坤李栋良吕兆民
Owner 广东领益智造股份有限公司
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