Manganese zinc ferrite material for high-power low-power-consumption high-frequency transformer and preparation method

Abstract

The invention belongs to the technical field of soft magnetic ferrite materials. A manganese zinc ferrite material is formed by main components and additives. According to a mass percent of a substance, and calculated by oxides, the main components comprise: 70-72.5% of Fe2O3, 4.5-5.5% of ZnO, 1.5-3.5% of NiO, 1-2% of Sm2O3, and the balance of Mn3O4. The manganese zinc ferrite material has the following beneficial effects: an initial permeability is 3500+(-)25%, and the valley point power loss within a temperature area in 25-140 DEG C is up to 270 kw / m<3>, TC is greater than 270 DEG C. The power loss is less than 280 kw / m<3> under the conditions of 500 KHZ, 50 mT, and 100 DEG C, and the power loss is less than 480 kw / m<3> under the conditions of 1 MHZ, 30 mT, and 100 DEG C.

Description

technical field [0001] The invention belongs to the technical field of ferrite electronic materials, and in particular relates to a manganese-zinc ferrite material for high-power and low-power high-frequency transformers. Background technique [0002] With the continuous and rapid development of the electronic information industry, as the largest output and most widely used soft ferrite material, it has been widely used in various electronic components. The world's major ferrite companies are competing to improve the technical performance of manganese-zinc ferrite materials to adapt to unused application fields. Under the requirements of users such as inverter air conditioners, electrodeless lighting electronics, power electronics, IT industry, communications, and household electronics, A material that requires higher BS, better DC superposition characteristics, lower power loss, wider use frequency and wider temperature adaptation range, higher Curie temperature, therefore,...

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Problems solved by technology

[0005] For example, a Chinese patent application (CN101183582A) discloses a manganese-zinc power ferrite material with high saturation BS and low loss. It obtains BS (greater than 460T at 100 degrees) by optimizing the formula and doping, especially adding 2 to 4mol% Ni0. High-frequency power consumption is less than 150KW / m at 500KHZ, 50mT, and 100 degrees 3 , but there is no mention of wide temperature broadband and Curie point height, so its application range is limited

[0006] In addition, a Chinese patent application (CN1749209A) discloses a high saturation magnetic flux density, low-loss manganese-zinc ferrite material and its preparation method. Through doping and process control, it obtains 100KHZ, 200mT, and 45°C lower than 245kw / m 3 The power consumption and the saturation magnetic flux density of 1194A / m, 50mT, and 25°C are higher than 535mT, but there is also no mention of wide temperature and broadband, and Curie temperature, so its application range is quite limited

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