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MnZn (manganese and zinc) ferrite material with low power consumption under conditions of high magnetic flux and high frequency and preparation method thereof

A technology of ferrite material and manufacturing method, which is applied in the direction of inductor/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc. To achieve the effect of improving power density, realizing miniaturization and high density

Inactive Publication Date: 2017-12-29
NANJING NEW CONDA MAGNETIC INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing MnZn ferrite materials lack high-frequency power consumption indicators and technical guarantees at a large magnetic flux density of 75mT to 100mT, and cannot well meet the application requirements for miniaturization and high power density of third-generation power semiconductor devices and related electronic equipment problem, the present invention provides a high magnetic flux, high frequency and low power consumption MnZn ferrite material and its manufacturing method, which reduces the power consumption of the material under high magnetic flux (75mT~100mT) and high frequency (1MHz)

Method used

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  • MnZn (manganese and zinc) ferrite material with low power consumption under conditions of high magnetic flux and high frequency and preparation method thereof
  • MnZn (manganese and zinc) ferrite material with low power consumption under conditions of high magnetic flux and high frequency and preparation method thereof
  • MnZn (manganese and zinc) ferrite material with low power consumption under conditions of high magnetic flux and high frequency and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Weigh each component of the main component: Fe 2 O 3 It is 54.5 mol%, ZnO is 6.0 mol%, MnO is 39.5 mol%, add pure water in a stirring ball mill and mix well and dry;

[0035] (2) Pre-burning in air at 900℃ for 2h;

[0036] (3) Add each component of the auxiliary component to the pre-burned powder, calculated by the total weight of the main component: CaCO 3 0.1wt%, SiO 2 0.003%, ZrO 2 0.05wt%, Co 2 O 3 0.3wt%, TiO 2 0.15wt%, NaO 2 0.006wt%; where Na is added in the form of a mixed solution of sodium carbonate and ammonium carbonate (sodium carbonate: ammonium carbonate = 1:1) (the amount added is converted into NaO 2 0.006wt%), the calcined material of the present invention will produce a series of unfavorable changes under alkaline conditions. For example, the calcined material exhibits strong hydrophilicity, and the magnets produced by such calcined material are very easy to appear Defects such as cracking and delamination make it difficult for the magnet to have an ide...

Embodiment 2

[0047] (1) Weigh each component of the main component: Fe 2 O 3 It is 55 mol%, ZnO is 5.5 mol%, MnO is 39.5 mol%; add pure water in a stirring ball mill and mix well and dry;

[0048] (2) Pre-burning in air at 930℃ for 2h;

[0049] (3) Add each component of the auxiliary component to the pre-burned powder, calculated by the total weight of the main component: CaCO 3 0.125wt%, SiO 2 0.005%, ZrO 2 0.04wt%, Co 2 O 3 0.3wt%, TiO 2 0.1wt%, NaO 2 0.006wt%; of which Na is mainly added in the form of sodium carbonate solution (addition is converted into NaO 2 0.006%);

[0050] (4) Grind and pulverize the above powder with pure water in a stirring ball mill, pulverize to an average particle size of 0.9μm, and then dry;

[0051] (5) Add 9.25wt% PVA solution (solution concentration of 10.25wt%) to the powder, mix, press and sieving to complete granulation;

[0052] (6) Use a molding machine to press the pellets into a ring-shaped magnetic powder core blank with an outer diameter of 16mm, an inner ...

Embodiment 3

[0057] (1) Weigh each component of the main component: Fe 2 O 3 It is 53.5 mol%, ZnO is 7.0 mol%, MnO is 39.5 mol%, add pure water in a stirring ball mill and mix well and dry;

[0058] (2) Pre-burning in air at 950℃ for 2h;

[0059] (3) Add each component of the auxiliary component to the pre-burned powder, calculated by the total weight of the main component: CaCO 3 0.15wt%, SiO 2 0.003%, ZrO 2 0.04wt%, Co 2 O 3 0.4wt%, TiO 2 0.2wt%, NaO 2 0.006wt%; of which Na is mainly added in the form of sodium carbonate solution (addition is converted into NaO 2 0.006%);

[0060] (4) Grind and pulverize the above-mentioned powders with pure water in a stirring ball mill, pulverize to an average particle size of 0.8 μm, and then dry;

[0061] (5) Add 9.25wt% PVA solution (the solution concentration is 10wt%) to the powder, mix, press and sieving to complete granulation;

[0062] (6) Use a molding machine to press the pellets into a ring-shaped magnetic powder core blank with an outer diameter of 1...

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Abstract

The invention discloses a MnZn (manganese and zinc) ferrite material with low power consumption under conditions of high magnetic flux and high frequency and a preparation method thereof, and belongs to the technical field of preparation of soft magnetic ferrite. The MnZn ferrite material is prepared from the following main components of 53.5 to 55mol% of Fe2O3 (iron oxide), 5.5 to 7.0mol% of ZnO (zinc oxide), and the balance of MnO (manganese oxide); on the basis of total weight of the main component, the auxiliary components include 0.1 to 0.15wt% of CaCO3 (calcium carbonate), 0.003 to 0.005wt% of SiO2 (silicon dioxide), 0.03 to 0.05wt% of ZrO2 (zirconium oxide), 0.3 to 0.4wt% of Co2O3 (cobalt dioxide), 0.1 to 0.2wt% of TiO2 (titanium dioxide), and 0.006 to 0.01wt% of NaO2 (sodium dioxide). The MnZn ferrite material has the advantages that the reasonable main components and auxiliary components are adopted, especially the trace additives of Na (sodium) and the like can reach regulating and control function on the microscopic structure of the sintering material, and the characteristics of low oxygen content, strong densifying, and lower sintering temperature no higher than 1170 DEG C in the sintering heating phase are combined, so as to obtain the microscopic structure with fine and uniform grain particles and higher density, thereby greatly reducing the power consumption under the conditions of high magnetic flux and high frequency.

Description

Technical field [0001] The invention belongs to the technical field of soft ferrite material manufacturing, and relates to a MnZn ferrite material with high magnetic flux, high frequency and low power consumption, and a manufacturing method thereof. Background technique [0002] As the most important oxide soft magnetic material, MnZn ferrite is used to make magnetic powder cores of various specifications, and then processed into various magnetic components such as transformers and inductors. It is widely used in communications, electromagnetic interference suppression, and new Energy, automotive electronics, IT, home appliances, green lighting, industry, medical, aerospace and military fields. In order to realize the miniaturization and light weight of electronic equipment, people have been working to improve the operating frequency of the circuit for many years. Therefore, the MnZn ferrite material used must have excellent electromagnetic properties at high frequencies, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/64H01F1/36H01F41/00
CPCC04B35/2658C04B35/64C04B2235/3201C04B2235/3232C04B2235/3244C04B2235/3275C04B2235/3418C04B2235/442C04B2235/5436C04B2235/77H01F1/36H01F41/00
Inventor 赵光李庆黄艳峰陈小林
Owner NANJING NEW CONDA MAGNETIC INDAL
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