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Low-total harmonic distortion (THD) wideband high-permeability MnZn ferrite material and manufacturing method thereof

A ferrite material, high permeability technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of distortion, the induced output voltage is not sinusoidal waveform, etc., to achieve uniform grain size, improve temperature characteristics Effect

Inactive Publication Date: 2011-11-02
江门安磁电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sinusoidal current in the transformer generates a sinusoidal alternating magnetic field H. Due to the nonlinear relationship between the magnetic flux density B and the magnetic field H in the ferrite material, the waveform of the induced magnetic flux density B is not a sinusoidal waveform. The resulting induced output voltage is also necessarily not a sinusoidal waveform, resulting in distortion

Method used

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  • Low-total harmonic distortion (THD) wideband high-permeability MnZn ferrite material and manufacturing method thereof
  • Low-total harmonic distortion (THD) wideband high-permeability MnZn ferrite material and manufacturing method thereof
  • Low-total harmonic distortion (THD) wideband high-permeability MnZn ferrite material and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Using commercially available Fe 2 o 3 , Mn 3 o 4 , ZnO as the main component, according to the amount shown in Table 1 Fe 2 o 3 , MnO (raw material is Mn 3 o 4 ), ZnO was placed in a sand mill, mixed for 1 hour and then dried in a spray drying tower. Pre-burn at 800°C-900°C for 2 hours. Then put the pre-fired powder into the ball mill, and add auxiliary ingredients at the same time, the auxiliary ingredients include MoO 3 、 Bi 2 o 3 , SiO 2 , CaCO 3 , the addition amounts are respectively 0.03wt%, 0.04wt%, 0.01wt%, 0.02wt% of the total weight of the main component, and then add 60wt% of the total weight of the main component of deionized water, 1wt% of the dispersant, 1wt% defoamer was ball milled together. Ball mill the powder until the average particle size is below 1.0mm, add an aqueous solution of 8 wt% polyvinyl alcohol based on the total weight of the main component to the slurry, spray granulate, and press into a ring-shaped sample of OR25×8-15mm, F...

Embodiment 2

[0030] Using commercially available Fe 2 o 3 , Mn 3 o 4 , ZnO as the main component, 52.0 mol% Fe 2 o 3 , 25.5 mol% MnO (raw material is Mn 3 o 4 ) and 22.5 mol% ZnO were mixed in a sand mill for 1 hour and then dried in a spray drying tower. Pre-burn at 800°C-900°C for 2 hours. Then put the pre-fired powder into the ball mill, and add auxiliary ingredients at the same time, the auxiliary ingredients include MoO 3 、 Bi 2 o 3 , SiO 2 , CaCO 3 , Nb 2 o 5 、TiO 2 、Co 2 o 3, the addition amount is listed in Table 2, and then add 60wt% deionized water, 1wt% dispersant, and 1wt% defoamer based on the total weight of the main components to carry out ball milling together. Ball mill the powder until the average particle size is below 1.0mm, add an aqueous solution of 8wt% polyvinyl alcohol based on the total weight of the main component to the slurry, spray granulate, and press into a ring-shaped sample of OR 25×8-15mm , and finally in a bell furnace controlled by a c...

Embodiment 3

[0042] Using commercially available Fe 2 o 3 , Mn 3 o 4 , ZnO as the main component, 52.0 mol% Fe 2 o 3 , 25.5 mol% MnO (raw material is Mn 3 o 4 ) and 22.5 mol% ZnO were mixed in a sand mill for 1 hour and then dried in a spray drying tower. Pre-burn at 800°C-900°C for 2 hours. Then put the pre-fired powder into the ball mill, and add auxiliary ingredients at the same time, the auxiliary ingredients include MoO 3 、 Bi 2 o 3 , SiO 2 , CaCO 3 , the addition amounts are respectively 0.03wt%, 0.06wt%, 0.01wt%, 0.02wt% of the total weight of the main component, and then add 60wt% of the total weight of the main component of deionized water, 1wt% of the dispersant, 1wt% defoamer was ball milled together. Ball mill the powder until the average particle size is below 1.0mm, add an aqueous solution of 8wt% polyvinyl alcohol based on the total weight of the main component to the slurry, spray granulate, and press into a ring-shaped sample of OR 25×8-15mm , and finally in ...

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Abstract

The invention provides a low-total harmonic distortion (THD) wideband high-permeability MnZn ferrite material, which comprises the following principal components of: 51.5 to 53 mol percent of Fe2O3, 22 to 27.5 mol percent of Mn3O4 based on MnO, and 20 to 25 mol percent of ZnO; and auxiliary components are at least four of TiO2 (or SnO2), Co2O3, MoO3, Bi2O3, SiO2, CaCO3 and Nb2O5, wherein the total weight of the auxiliary components is 0.02 to 0.04 weight percent of that of the principal components. In the low-THD wideband high-permeability MnZn ferrite material, an initial permeability at a low frequency of 10kHz and a high frequency of 200kHz at the temperature of 25 DEG C is not less than 10,000, and a hysteresis constant etaB is less than 0.2*10<-6> / mT. The invention also provides a method for manufacturing the low-THD wideband high-permeability MnZn ferrite material, which comprises the following steps of: mixing, drying, presintering, ball milling, pelleting, compression molding and sintering. The method has the advantages of simple process and low cost.

Description

technical field [0001] The invention relates to a MnZn ferrite material and a manufacturing method thereof, in particular to a low THD broadband high magnetic permeability MnZn ferrite material and a manufacturing method thereof, belonging to the technical field of magnetic materials. Background technique [0002] With the development of multimedia communication and digital communication network, xDSL communication technology has been widely used, and the demand for ferrite cores in the communication field is increasing. In xDSL communication, it is required that the broadband transformer in the modem must have very little transmission waveform distortion and very little noise, so as to reduce the occurrence of transmission signal errors. However, the sinusoidal current in the transformer generates a sinusoidal alternating magnetic field H. Due to the nonlinear relationship between the magnetic flux density B and the magnetic field H in the ferrite material, the waveform of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F1/22C04B35/622C04B35/64
Inventor 黄爱萍宋秀鹏谭福清豆小明汪南东
Owner 江门安磁电子有限公司
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