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A kind of thermal shock resistant nizn ferrite material and preparation method thereof

A ferrite material and ferrite technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of unsatisfactory thermal shock, dark cracking phenomenon, etc., achieve low thermal expansion coefficient, and inhibit the expansion of cracks , The effect of improving thermal shock resistance

Active Publication Date: 2021-12-14
SHENZHEN SUNLORD ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing large-size nickel-zinc ferrite wound core products are not ideal for heat shock resistance, direct cracking after soldering > 3.0% (visual inspection before polishing), dark cracks after soldering, solder cracking after polishing > 20% (visually after grinding); it is urgent to develop heat-shock resistant NiZn ferrite materials for large-scale ultra-thin products with better performance, mainly suitable for large-scale wire-wound ferrite cores, and it is expected to substantially improve the material Excellent thermal shock resistance, and to ensure the electromagnetic properties of the material, improve the yield and performance of magnetic core products

Method used

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  • A kind of thermal shock resistant nizn ferrite material and preparation method thereof
  • A kind of thermal shock resistant nizn ferrite material and preparation method thereof
  • A kind of thermal shock resistant nizn ferrite material and preparation method thereof

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Experimental program
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preparation example Construction

[0046] Step 2, preparation of the ferrite main material.

[0047] Weigh raw material Fe according to formula 2 o 3 , NiO, ZnO, CuO, for later use; put the weighed main component raw materials into the sand mill, according to the material: ball: water mass ratio 1:4:1.5, add 1mm to 5mm in diameter into the sand mill tank Zirconia balls and deionized water, set the speed of the sand mill at 200-250rpm, and after ball milling for 4h-10h, the particle size of the powder is controlled at D50=1.0μm±0.2μm to prepare the slurry; put the slurry obtained in step 2 Dry in an oven, the oven temperature is set at 100°C-200°C, and the time is 10h-24h; then the powder is placed in a high-temperature sintering furnace for pre-sintering, the temperature is set at 830°C-880°C, and the heating curve is 1°C- 4°C / min, keep warm for 2h to 4h and then cool naturally to get calcined powder.

[0048] Step 3. Preparation of a NiZn heat-shock resistant material for large-scale ultra-thin products.

...

example 1

[0098] A thermal shock resistant NiZn ferrite material, its formula is divided into main component and additive component;

[0099] The main components are based on the weight of oxides:

[0100]

[0101] The additive is special glass powder, accounting for the weight of the main material:

[0102] Glass powder 0.5%

[0103] The main composition of glass powder is SiO 2 , B 2 o 3 、Na 2 O, K 2 O, Al 2 o 3 , BaO, Fe 2 o 3 , NiO, CuO, ZnO, the composition of which is based on the weight percentage of the total glass powder,

[0104]

[0105]

[0106] The main components of raw materials and additive components are high-purity raw materials, and the purity is Fe 2 o 3 ≥99.5wt%, NiO≥99.5wt%, ZnO≥99.5wt%, CuO≥99.5wt%, SiO 2 ≥99wt%, B 2 o 3 ≥99wt%, Na 2 O≥99wt%, K 2 O≥99wt%, Al 2 o 3 ≥99wt%, BaO≥99wt%.

[0107] A kind of manufacturing method of heat-shock resistant NiZn ferrite material for large-scale ultra-thin product, comprises the following steps:

...

example 2

[0137] A thermal shock resistant NiZn ferrite material, its formula is divided into main component and additive component;

[0138] The main components are based on the weight of oxides:

[0139]

[0140] The additive is special glass powder, accounting for the weight of the main material:

[0141] Glass powder 0.6%

[0142] The main composition of glass powder is SiO 2 , B 2 o 3 、Na 2 O, K 2 O, Al 2 o 3 , BaO, Fe 2 o 3 , NiO, CuO, ZnO, the composition of which is based on the weight percentage of the total glass powder,

[0143]

[0144] The main components of raw materials and additive components are high-purity raw materials, and the purity is Fe 2 o 3 ≥99.5wt%, NiO≥99.5wt%, ZnO≥99.5wt%, CuO≥99.5wt%, SiO 2 ≥99wt%, B 2 o 3 ≥99wt%, Na 2 O≥99wt%, K 2 O≥99wt%, Al 2 o 3 ≥99wt%, BaO≥99wt%.

[0145] A kind of manufacturing method of heat-shock resistant NiZn ferrite material for large-scale ultra-thin product, comprises the following steps:

[0146] Step...

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Abstract

A NiZn ferrite material and a preparation method thereof, the NiZn ferrite material comprising: a main component comprising: 65.0wt% to 68.0wt% Fe 2 o 3 , 11.0wt% ~ 13.0wt% NiO, 16.0wt% ~ 20.0wt% ZnO, 3.0wt% ~ 6.0wt% CuO; additives include glass powder, accounting for 0.1wt% ~ 1.0wt% of the total weight; to account for the weight of glass powder In percentage terms, the glass powder includes 40.0wt% to 70.0wt% SiO 2 , 2.0wt% ~ 10.0wt% B 2 o 3 , 1.0wt% ~ 10.0wt% Na 2 O, 1.0wt% ~ 10.0wt% K 2 O, 2.0wt% ~ 6.0wt% Al 2 o 3 , 1.0wt% ~ 8.0wt% BaO, 0.1wt% ~ 1.0wt% Fe 2 o 3 , 0.1wt%-1.0wt% NiO, 0.1wt%-1.0wt% CuO, 0.1wt%-1.0wt% ZnO. The invention can effectively improve the thermal shock resistance of the NiZn ferrite material, which is superior to similar traditional NiZn ferrite materials, and is especially suitable for making large-sized ultra-thin products.

Description

technical field [0001] The invention relates to a ferrite material, in particular to a thermal shock resistant NiZn ferrite material and a preparation method thereof. Background technique [0002] Existing large-size nickel-zinc ferrite wound core products are not ideal for heat shock resistance, direct cracking after soldering > 3.0% (visual inspection before polishing), dark cracks after soldering, solder cracking after polishing > 20% (visually after grinding); it is urgent to develop heat-shock resistant NiZn ferrite materials for large-scale ultra-thin products with better performance, mainly suitable for large-scale wire-wound ferrite cores, and it is expected to substantially improve the material Excellent thermal shock resistance, and to ensure the electromagnetic properties of the material, improve the yield and performance of magnetic core products. Contents of the invention [0003] In order to solve the above technical problems, the present invention pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/30C04B35/622C04B35/64C03C12/00C03C3/093
CPCC04B35/2633C04B35/265C04B35/622C04B35/64C03C3/093H01F1/344C04B2235/36C04B2235/6562C04B2235/6567C04B2235/6565C04B2235/96C04B2235/9607
Inventor 朱晏军聂敏
Owner SHENZHEN SUNLORD ELECTRONICS
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