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Ultralow-loss high-Bs soft magnetic ferrite material and preparation method

A soft magnetic ferrite, ultra-low technology, applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve the problems of transformer power consumption increase, operating temperature rise, transformer burnout, etc., to reduce power loss , reduce the sintering temperature, improve the effect of resistance at the grain boundary

Inactive Publication Date: 2018-01-12
HAINING LIANFENG MAGNET IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The valley point temperature of the power loss of traditional ferrite materials is 80°C to 90°C. With the further miniaturization of devices, heat dissipation becomes difficult, and the actual operating temperature rises, resulting in a further increase in power consumption of the transformer, thus forming a malignant Cycle until the transformer burns out

Method used

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  • Ultralow-loss high-Bs soft magnetic ferrite material and preparation method
  • Ultralow-loss high-Bs soft magnetic ferrite material and preparation method
  • Ultralow-loss high-Bs soft magnetic ferrite material and preparation method

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Embodiment 1

[0030] An ultra-low loss high Bs soft ferrite material, including main components and additives, by Fe 2 o 3 , ZnO, MnO, TiO 2 Calculated, the composition of the main component is: 52.5mol% Fe 2 o 3 , 9.9mol% ZnO, 0.2mol% TiO 2 , 37.4mol% MnO; additive: 200ppm CaCO 3 , 300ppm Nb 2 o 5 , 50ppm Bi 2 o 3 , 200ppm V 2 o 5 , 100ppm SiO 2 , 200ppm Ta 2 o 5 , 200ppm of CoO (ppm is the unit of volume concentration, 1ppm=1mg / L, 1wt%=10000ppm).

[0031] TiO 2 Ti 4+ After entering the lattice, it can suppress electrons in Fe 3+ and Fe 2+Jump between, improve the resistivity in the grain; at the same time, TiO 2 The content is higher, making TiO 2 Can not all enter the crystal lattice, part of TiO stays at the grain boundary 2 with CaCO 3 , the reaction produces high-resistance CaTiO 3 , which increases the resistance at the grain boundary, so TiO 2 Effectively reduce the power loss of ferrite at high temperature, so that the transformer using this ferrite has lower...

Embodiment 2

[0051] The difference between this embodiment and embodiment one is that the main component is: 52.9mol% Fe 2 o 3 , 9.9mol% ZnO, 0.2mol% TiO 2 , 37mol% MnO; additive: 300ppm CaCO 3 , 200ppm Nb 2 o 5 , 50ppm Bi 2 o 3 , 300ppm V 2 o 5 , 100ppm SiO 2 , 200ppm Ta 2 o 5 , 200ppm of CoO.

Embodiment 3

[0053] The difference between this embodiment and embodiment one is that the main component is: 53.5mol% Fe 2 o 3 , 9.9mol% ZnO, 0.2mol% TiO 2 , 36.4mol% MnO; additive: 300ppm CaCO 3 , 300ppm Nb 2 o 5 , 50ppm Bi 2 o 3 , 200ppm V 2 o 5 , 100ppm SiO 2 , 200ppm Ta 2 o 5 , 200ppm of CoO.

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Abstract

The invention discloses an ultralow-loss soft magnetic ferrite material with high saturation flux density and a preparation method thereof. The following main components are calculated in terms of total quantities of Fe2O3, ZnO, MnO and TiO2: 52 to 54 mol% of Fe2O3, 9 to 11 mol% of ZnO, 0.2 to 1 mol% of TiO2 and 36 to 38 mol% of MnO; and the following additives are calculated in terms of total quantities of Fe2O3, ZnO, MnO and TiO2: 100 to 500 ppm of CaCO3, 50 to 200 ppm of SiO2, 200 to 400 ppm of Nb2O5, 150 to 300 ppm of Ta2O5, 50 to 150 ppm of Bi2O3, 50 to 400 ppm of V2O5 and 200 to 700 ppmof CoO. The TiO2 and the various additives are added, so that a transformer using the ferrite has lower temperature rise and higher using frequency.

Description

technical field [0001] The invention belongs to the field of ferrite materials, in particular to a soft ferrite material with ultra-low loss and high Bs. Background technique [0002] With the development of intelligent electronic equipment and Internet of Things technology, various electronic equipment is becoming smaller and lighter, especially various consumer electronic products, such as mobile phones, LCD TVs, computers, digital cameras, etc., are becoming more and more portable Small size, which requires that the switching power supply that provides energy for these electronic devices must be more miniaturized and lightweight. Therefore, the core material that plays a key role in the transformer must have higher performance. Power-type manganese-zinc ferrite is due to its Excellent high-frequency performance, widely used in transformers of various switching power supplies. [0003] In order to reduce the heat generated by the transformer in use and reduce its volume, ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/34H01F41/02
Inventor 王微达李永劬郭凤鸣严建强王士杰
Owner HAINING LIANFENG MAGNET IND