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MnZn power ferrite material for reducing negative temperature loss and preparation method thereof

A ferrite material and power technology, which is applied in the direction of inorganic material magnetism, inductor/transformer/magnet manufacturing, electrical components, etc. reduce the loss and other issues to achieve the effect of low loss

Inactive Publication Date: 2018-11-16
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, the authorized announcement number is CN102751065B, the wide temperature and broadband low loss MnZn power ferrite material and its preparation method, and the authorized announcement number is CN103693952B, and the manufacturing method of an ultra-low loss MnZn power ferrite material, and the authorized announcement number is CN102693807B An ultra-wide temperature, low loss, high magnetic flux density MnZn power ferrite and its preparation method. The temperature ranges of these three inventions are all within 25°C-140°C, but they do not focus on negative temperature conditions. Reduce the loss of MnZn power ferrite material, resulting in no MnZn power ferrite material and its preparation method that can reduce loss under negative temperature conditions

Method used

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  • MnZn power ferrite material for reducing negative temperature loss and preparation method thereof
  • MnZn power ferrite material for reducing negative temperature loss and preparation method thereof
  • MnZn power ferrite material for reducing negative temperature loss and preparation method thereof

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Effect test

Embodiment 1

[0039] 52.6mol% Fe 2 o 3 And 10.2mol% of ZnO, the rest is the amount of MnO. Mix according to the ratio of ball water to 1:4:0.45, sand and crush in a sand mill for 1 hour, then spray and granulate, and put it into a rotary kiln for pre-calcination at 950°C. 0.04wt% CaCO 3 , 0.025wt% ZrO 2 and 0.35wt% Co 2 o 3 Add it to the calcined material, put the calcined material and additives into a sand mill, grind it for 160 minutes, then spray granulate, and press it into a standard ring under a certain pressure. Put the standard ring into a bell furnace for sintering, and the sintering temperature is 1300°C. Incubate for 5 hours with an oxygen content of 5%. Then cool under the protection of nitrogen. When the temperature drops to 1200°C, the oxygen content is controlled at 0.3%, and at 1150°C, the oxygen content is controlled at 0.95%, so that the MnZn power ferrite material with reduced negative temperature loss is obtained.

Embodiment 2

[0047] 52.7mol% Fe 2 o 3 And 9.7mol% of ZnO, the rest is the amount of MnO. Mix according to the ratio of ball water to 1:4:0.45, sand and crush in a sand mill for 1 hour, then spray and granulate, and put it into a rotary kiln for pre-calcination at 950°C. 0.06wt% CaCO 3 , 0.04wt% ZrO 2 and 0.4wt% Co 2 o 3 Add it to the calcined material, put the calcined material and additives into a sand mill, grind it for 160 minutes, then spray granulate, and press it into a standard ring under a certain pressure. Put the standard ring into a bell furnace for sintering, and the sintering temperature is 1300°C. Incubate for 5 hours with an oxygen content of 6%. Then cool under the protection of nitrogen. When the temperature drops to 1200°C, the oxygen content is controlled at 1.5%, and at 1150°C, the oxygen content is controlled at 0.1%, and then cooled to room temperature under the protection of nitrogen.

Embodiment 2 and comparative example 2

[0051] Table 2 embodiment 2 and comparative example 2 sample ring test results

[0052]

[0053] As can be seen from Table 2, in Comparative Example 2 Co 2 o 3 The amount is beyond the range of the present invention, resulting in relatively poor loss.

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Abstract

The invention relates to the field of MnZn power ferrite, in particular to a MnZn power ferrite material for reducing negative temperature loss and a preparation method thereof. The MnZn power ferritematerial consists of a main component and an additive, wherein the main component and the content thereof are calculated according to the following oxides: 52.60-52.80mol% of Fe2O3, 9.5-10.2mol% of ZnO and the balance of MnO; and the components of the additive are calculated according to the following oxides based on the total weight of the main component raw materials: CaCO3, ZrO2 and Co2O3, andthe content of ZrO2 must be greater than 0.015wt%. The MnZn power ferrite material provided by the invention can have a low loss at -20-0 DEG C and can be applied to the fields of communication, newenergy and automobiles under negative temperature conditions.

Description

technical field [0001] The invention relates to the field of MnZn power ferrite, in particular to a MnZn power ferrite material with reduced negative temperature loss and a preparation method thereof. Background technique [0002] In the past two years, major ferrite companies in the world have competed to improve the technical performance of manganese-zinc ferrite materials to adapt to the increasingly expanding application fields, which has brought vitality to the development of this basic functional material. Under the demanding requirements of IT industry, power electronics, especially network communication users, in order to ensure the stable, reliable and efficient operation of the equipment system, a concept of seeking innovation and perfection has gradually dominated the research and development direction of ferrite soft magnetic materials. . This is to require the material to have higher saturation magnetic flux density Bs, better DC superposition characteristics D...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622C04B35/63H01F1/36H01F41/02
CPCC04B35/2633C04B35/622C04B35/6303C04B2235/3244C04B2235/3275C04B2235/602C04B2235/656C04B2235/6567C04B2235/6584H01F1/36H01F41/02
Inventor 吕东华
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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