A kind of soft magnetic ferrite material with high frequency, low loss and high saturation magnetic flux density and its preparation method

A soft ferrite and magnetic flux density technology, applied in the direction of inorganic material magnetism, etc., can solve the problem of not improving the saturation magnetic flux density characteristics, and achieve the effect of optimizing the sintering process and high magnetic flux density

Active Publication Date: 2020-01-10
天通凯立科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] MnZn ferrite core loss can be divided into three parts: hysteresis loss (Ph), eddy current loss (Pe), residual loss (Pr), for MnZn ferrite, at higher frequencies, eddy current loss and residual Loss accounts for the main part, and reducing the high-frequency loss of MnZn ferrite mainly starts from the following aspects: adjusting the formula, adding additives and optimizing the process; the patent document of publication number CN1038333344A discloses a high-frequency low-loss ferrite and its preparation method, by putting Fe 2 o 3 The content of ZnO is fixed at 54~57mol%, and the ZnO content is limited to 0~5mol%, which realizes low loss at high frequency, but only involves loss, and does not improve the saturation magnetic flux density characteristics

Method used

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  • A kind of soft magnetic ferrite material with high frequency, low loss and high saturation magnetic flux density and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: A high-frequency, low-loss, high-saturation magnetic flux density soft ferrite material, composed of a main component and a sub-component, the main component is a quaternary system, respectively Fe 2 O 3 : 54.96mol%, ZnO: 5.66mol%, Co 2 O 3 :0.10mol%, the rest is MnO; secondary component Nb 2 O 5 :0.02wt%, CaCO 3 :0.10wt%, V 2 O 5 :0.03wt%, ZrO 2 : 0.01wt%, the above auxiliary components are as Fe 2 O 3 , ZnO, MnO, Co 2 O 3 The total weight percentage is calculated.

[0019] A method for preparing the high-frequency, low-loss, high-saturation magnetic flux density soft ferrite material described in Example 1, including the following steps:

[0020] 1) Ingredients: adopt quaternary formula, follow the main formula Fe 2 O 3 , ZnO, Co 2 O 3 The ratio of MnO and MnO is weighed and mixed with sanding, and the sanding time is 15min;

[0021] 2) Pre-burning: pre-burn the mixed powder, the pre-burning temperature is 850℃, and the heat preservation is 2h;

[0022] 3) Sand ...

Embodiment 2

[0027] Embodiment 2: A high-frequency, low-loss, high-saturation magnetic flux density soft ferrite material, composed of a main component and a secondary component, the main component is a quaternary system, respectively Fe 2 O 3 :55.36mol%, ZnO: 4.00mol%, Co 2 O 3 :0.20mol%, the rest is MnO; secondary component Nb 2 O 5 :0.02wt%, CaCO 3 :0.05wt%, V 2 O 5 :0.03wt%, ZrO 2 : 0.01wt%, the above auxiliary components are as Fe 2 O 3 , ZnO, MnO, Co 2 O 3 The total weight percentage is calculated.

[0028] A method for preparing the high-frequency, low-loss, high-saturation magnetic flux density soft ferrite material described in Example 2, including the following steps:

[0029] 1) Ingredients: adopt quaternary formula, follow the main formula Fe 2 O 3 , ZnO, Co 2 O 3 The ratio of MnO and MnO is weighed and sanded, and the sanding time is 20min;

[0030] 2) Pre-burning: pre-burning the mixed powder, the pre-burning temperature is 900℃, and the heat preservation is 2h;

[0031] 3) Sand mill...

Embodiment 3

[0036] Embodiment 3: A high-frequency, low-loss, high-saturation magnetic flux density soft ferrite material, consisting of a main component and a sub-component, the main component is a quaternary system, respectively Fe 2 O 3 :55.40mol%, ZnO: 3.77mol%, Co 2 O 3 :0.20mol%, the rest is MnO; secondary component Nb 2 O 5 :0.02wt%, CaCO 3 :0.10wt%, V 2 O 5 :0.03wt%, Ta 2 O 5 :0.03wt%, the above auxiliary components are as Fe 2 O 3 , ZnO, MnO, Co 2 O 3 The total weight percentage is calculated.

[0037] A method for preparing the high-frequency, low-loss, high-saturation magnetic flux density soft ferrite material described in Example 3 includes the following steps:

[0038] 1) Ingredients: adopt quaternary formula, follow the main formula Fe 2 O 3 , ZnO, Co 2 O 3 The ratio of MnO and MnO is weighed and mixed with sanding, and the sanding time is 15min;

[0039] 2) Pre-burning: pre-burning the mixed powder, the pre-burning temperature is 750℃, and the heat preservation is 2h;

[0040] 3) S...

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Abstract

The invention discloses a high-frequency low-consumption high-saturation flux density soft magnetic ferrite material and a preparation method thereof. The ferrite material consists of main components and secondary components, wherein the main components comprise 54.5-55.5 mol% of Fe2O3, 3.5-6 mol% of ZnO, 0.10-0.25 mol% of Co2O3 and the balance of MnO on the basis of respective oxides; the secondary components comprise one or more of Nb2O5, CaCO3, V2O5, ZrO2 and Ta2O5. The preparation method comprises steps of material preparation, sand milling, pre-calcining, thermal treatment, molding and sintering. Due to addition of Co2O3 in the main components, and constitution contents of the main components and the secondary components are controlled, a sintering process is optimized, and the soft magnetic ferrite material simultaneously has properties of high frequency, low consumption and high flux density.

Description

Technical field [0001] The invention relates to a soft ferrite material and a preparation method thereof, in particular to a soft ferrite material with high frequency, low loss and high saturation magnetic flux density and a preparation method thereof. Background technique [0002] At present, soft ferrite is a material with high permeability, high resistivity and low loss characteristics, so it is widely used in transformers, inductors, switching power supplies, communication equipment, and computer electronic rectifier equipment; MnZn ferrite As an important soft ferrite material, it is widely used in the fields of electronics and communication, mainly for energy storage and conversion. With the development of miniaturization, high efficiency, and high energy density of electronic equipment for power conversion, on the one hand, the frequency of soft ferrite materials for power conversion is required to be higher and higher, and low loss at high operating frequencies. At prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/36C04B35/26C04B35/626C04B35/64
CPCC04B35/2666C04B35/6261C04B35/62645C04B35/62695C04B35/64C04B2235/3208C04B2235/3239C04B2235/3246C04B2235/3251C04B2235/3262C04B2235/3284C04B2235/6567C04B2235/6583C04B2235/96
Inventor 张强原邢冰冰李小龙沈晓燕
Owner 天通凯立科技有限公司
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