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Preparation method of MnZn ferrite material with wide temperature range, low temperature coefficient and low power consumption

A low temperature coefficient, ferrite material technology, applied in the direction of magnetic materials, inorganic material magnetism, magnetic objects, etc., can solve the problems of low loss, unsatisfactory temperature coefficient, etc., achieve total loss reduction, high saturation magnetization, crystal Well-structured effects

Inactive Publication Date: 2019-04-26
NANTONG HUAXING MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ferrite material has relatively low loss in the temperature range of 25 to 140°C, but the temperature coefficient is not ideal

Method used

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  • Preparation method of MnZn ferrite material with wide temperature range, low temperature coefficient and low power consumption
  • Preparation method of MnZn ferrite material with wide temperature range, low temperature coefficient and low power consumption

Examples

Experimental program
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Effect test

Embodiment 1

[0043] First, according to the prescribed formula ingredients: Fe 2 o 3 53.5mol%, ZnO is 9.6mol%, GeO 2 MnO is 0.022mol%, MnO is 36.878mol%, mixed, in the sand mill, add deionized water of equal weight, sand mill time is 90 minutes, mix Cu 2 o 3 0.5wt%;

[0044] Dry the above-mentioned abrasive materials, pre-fire at 950°C for 120 minutes, cool down, and perform secondary sand grinding, adding CaCO 3 0.03wt%, K 2 O is 0.02wt%, adding the same amount of deionized water as the weight of the material, sanding for 4 hours, so that the average particle size of the calcined material is less than 0.8 μm;

[0045] Add 12wt% polyvinyl alcohol (PVA) and 1.0wt% zinc stearate to the obtained powder by weight, mix well, use a 45-mesh sub-sieve to granulate, and press into a φ25 sample ring, and then place it in an atmosphere sintering furnace , sintering under the protection of nitrogen, in the temperature range of 600-800 ° C, the oxygen partial pressure is 0.005%, and the temperatu...

Embodiment 2

[0047] First, according to the prescribed formula ingredients: Fe 2 o 3 53.5mol%, ZnO is 9.6mol%, GeO 2 MnO is 0.022mol%, MnO is 36.878mol%, mixed, in the sand mill, add deionized water of equal weight, sand mill time is 90 minutes, mix Cu 2 o 3 0.5wt%, Sm 2 o 3 0.02mol%;

[0048] Dry the above-mentioned abrasive materials, pre-fire at 950°C for 120 minutes, cool down, and perform secondary sand grinding, adding CaCO 3 0.04wt%, K 2 O is 0.03wt%, SiO 2 0.1wt%, TiO 2 0.08mol%, add the same amount of deionized water as the weight of the material, and sand mill for 4 hours, so that the average particle size of the calcined material is less than 0.8 μm;

[0049] Add 12wt% polyvinyl alcohol (PVA) and 1.0wt% zinc stearate to the obtained powder by weight, mix well, use a 45-mesh sub-sieve to granulate, and press into a φ25 sample ring, and then place it in an atmosphere sintering furnace , sintering under the protection of nitrogen, in the temperature range of 600-800 ° C, ...

Embodiment 3

[0051] First, according to the prescribed formula ingredients: Fe 2 o 3 52.7mol%, ZnO is 8.6mol%, GeO 2 0.007mol%, MnO is 38.693mol%, mixed, in the sand mill, add deionized water of equal weight, sand milling time is 90 minutes, doped Cu 2 o 3 0.4wt%, Sm 2 o 3 0.005mol%;

[0052] Dry the above-mentioned abrasive materials, pre-fire at 950°C for 120 minutes, cool down, and perform secondary sand grinding, adding CaCO 3 0.03wt%, K 2 O 0.02wt%, CaCO 3 0.03wt%, K 2 O is 0.02wt%, adding the same amount of deionized water as the weight of the material, sanding for 4 hours, so that the average particle size of the calcined material is less than 0.8 μm;

[0053] Add 8wt% polyvinyl alcohol (PVA) and 1.0wt% zinc stearate to the obtained powder by weight, mix well, use a 45-mesh sub-sieve to granulate, and press into a φ25 sample ring, and then place it in an atmosphere sintering furnace , sintering under the protection of nitrogen, in the temperature range of 600-800 ° C, the ...

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Abstract

The invention aims at providing a preparation method of a MnZn ferrite material with wide temperature range, low temperature coefficient and low power consumption. The preparation method comprises thefollowing steps: preparing main ingredients, performing first sanding on the main ingredients, pre-sintering the main ingredients, performing second sanding on the pre-sintered main ingredients and performing granulation, wherein GeO2, Cu2O3 and / or Sm2O3 are doped in the first sanding; K2O and / or TiO2 are / is doped in second sanding. According to the preparation method, the MnZn ferrite material is prepared by adjusting the composition of the main formula and the impurity adding mode; for the MnZn ferrite material, the saturation flux density is greater than 440mT, the specific temperature coefficient within the range of -40 DEG C-140 DEG C is less than or equal to 1.5*10<-6> / DEG C, and the power consumption coefficient Pcv under 100kHz is below 340kW / m<3>.

Description

technical field [0001] The invention belongs to the field of advanced preparation and application of high-performance soft magnetic ferrite materials, and relates to a preparation method of manganese-zinc ferrite materials with wide temperature, low temperature coefficient and low power consumption. Background technique [0002] With the continuous rise of industries such as photovoltaic industry, electronic information technology, electric vehicles and hybrid electric vehicles, electronic equipment used in these emerging industries will surely achieve unprecedented development, which will play a role in ferrite materials used in these fields. Pretty big boost. MnZn ferrite material has the characteristics of low loss, high Bs, high magnetic permeability, high resistivity, etc., and is widely used in various electronic components, such as power transformers, choke coils, pulse broadband transformers, etc., and now MnZn ferrite Oxygen materials have become indispensable basi...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622C04B35/626H01F1/34
CPCC04B35/2658C04B35/622C04B35/62605C04B2235/3201C04B2235/3208C04B2235/3281C04B2235/3287C04B2235/6567C04B2235/6583H01F1/344
Inventor 杨美华
Owner NANTONG HUAXING MAGNETIC MATERIAL
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