High-temperature high-Bs low-loss MnZn ferrite material and preparation method thereof

A ferrite material and low-loss technology, applied in the field of MnZn ferrite material and its manufacturing, can solve the problems of lack of practical value, increased power consumption of materials, high energy consumption, etc., to solve the deterioration of loss, reduce power consumption, crystal The effect of uniform grain growth

Inactive Publication Date: 2011-10-19
江门安磁电子有限公司
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  • Application Information

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Problems solved by technology

With the increase of the sintered crystal grains, the sintered density of the ferrite material increases, and the Bs of the material increases accordingly, but the eddy current loss of the material is proportional to the square of the grain diameter, and the increase of the grain size will directly lead to the work of the material. consumption increase problem
[0008] Many workers have been researching high-Bs and low-loss MnZn ferrite materials. The existing high-Bs and low-loss

Method used

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  • High-temperature high-Bs low-loss MnZn ferrite material and preparation method thereof

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Embodiment 1

[0032] The main component is 54.5mol% Fe with a sand mill 2 o 3 , 37.7mol% Mn based on Mn 3 o 4 Mix it with 7.8mol% ZnO wet mill and place it in a drying oven for drying. The obtained powder was pre-fired at 880° C. for 2 hours in a box-type resistance furnace. Then put the calcined powder into a ball mill, based on the total weight of the main component, add an auxiliary component to the resulting powder: 0.04wt% CaCO 3 , 0.006wt% SiO 2 , 0.04wt% Nb 2 o 5 , 0.08wt% CoO, 0.04wt% V 2 o 5 , 0.10wt% NiO, 0.06wt% Ni 2 o 3 ; 0.25 wt% Li 2 CO 3; Then add 66wt% deionized water, 1wt% dispersant and 1wt% defoamer to account for the total weight of the main component and carry out ball milling together. Ball mill the powder until the average particle size is about 1.0±0.2mm; based on the total weight of the powder after ball milling, add 8wt% polyvinyl alcohol solution to the powder, mix and granulate evenly, and use a pressure of 50-200MPa The granules are pressed into gr...

Embodiment 2－6

[0035] For the components of Examples 2-6, see Table 1 below, and the implementation steps are the same as in Example 1 above. The test results of the magnetic properties of the materials prepared in Examples 2-6 are listed in Table 2 below.

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Abstract

The invention provides a high-temperature high-Bs low-loss MnZn ferrite material which comprises main components and auxiliary components, wherein the main components comprise 53mol%-56mol% of ferrite, 34mol%-42mol% of manganese oxide and 4mol%-10mol% of zinc oxide, wherein the content of manganese oxide is accounted by Mn; the auxiliary components are selected from at least four out of CaCO3, SiO2, Nb2O5, V2O5, CoO, NiO, Ni2O3 and Li2CO3, and based on the total weight of the main components, the weight percentage of the auxiliary components is as follows: 0.02-0.08wt% of CaCO3, 0.002-0.01wt% of SiO2, 0.02-0.06 wt% of Nb2O5, 0.01-0.05wt% of V2O5, 0.03-0.20wt% of CoO, 0.03-0.20wt% of NiO, 0.03-0.14wt% of Ni2O3, and 0.01-0.10wt% of Li2CO3. The invention also provides a preparation method of the high-temperature high-Bs low-loss MnZn ferrite material.

Description

technical field [0001] The invention relates to a MnZn ferrite material and a manufacturing method thereof, and in particular to a high-temperature, high-Bs, low-loss MnZn ferrite material and a manufacturing method thereof. Background technique [0002] With the improvement of people's living standards, the requirements for quality of life are getting higher and higher, and various research departments are vigorously developing non-polluting electric vehicles. Electronic components used in electric vehicles are required not only to have high efficiency, small size, and light weight, but also to have high reliability under harsh working environments. Taking the ferrite core as an automobile charging transformer as an example, it is not only required to have a high saturation magnetic flux density, but also a low power loss. At the same time, because the core temperature rises due to the heat generated during the high-current charging process, it is also desired that the mat...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 豆小明黄爱萍谭福清汪南东
Owner 江门安磁电子有限公司
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