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MnZn ferrite material with high saturation magnetic flux density and low power consumption

A ferrite material, magnetic flux density technology, applied in the direction of inorganic material magnetism, etc., can solve the problem of low power consumption, achieve the effect of improving energy conversion efficiency, improving market competitiveness, and low power consumption of materials

Active Publication Date: 2009-10-07
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems existing in the preparation of MnZn ferrite with high saturation magnetic flux density and low power consumption in the prior art, and provides a MnZn ferrite material with high saturation magnetic flux density and low power consumption, which can improve the saturation magnetic flux density Bs At the same time, the power consumption is still maintained at a low level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] will consist of 54.5mol% Fe 2 o 3 , 2mol% Zn0, 43.5mol% MnO raw materials were mixed in a sand mill for 1 hour, and then pre-fired at 800 °C for 2 hours. Taking the mass in the powder material after pre-burning as a benchmark, add auxiliary components in the above-mentioned calcined material, the added auxiliary components (wt%) are: 0.015wt% SiO 2 , 0.08wt% CaO, 0.02wt% V 2 o 5 , 0.03 wt% HfO 2 , 0.1wt% SnO 2 , 0.1wt% CoO, and then carry out secondary sand grinding for 2 hours, spray granulation after adding PVA, and shape it into a standard annular magnetic core of Φ25 for sintering. At 1300°C for 5 hours, the oxygen partial pressure was maintained at 6%. Finally, the temperature was lowered from 1300°C to 100°C, and the equilibrium oxygen partial pressure was maintained during the cooling process.

[0022] Use the SY-8258 B-H tester to test the Bs of the sample at 50Hz, 1194A / m, and 100°C, and the result is 455mT; test the volume power consumption (Pcv) of the ...

Embodiment 2

[0027] will consist of 53.5mol% Fe 2 o 3 , 7.5mol% ZnO, 42mol% MnO raw materials were mixed in a sand mill for 1 hour, and then pre-fired at 800°C for 2 hours. Taking the mass in the powder material after pre-burning as a benchmark, add auxiliary components in the above-mentioned calcined material, the added auxiliary components (wt%) are: 0.015wt% SiO 2 , 0.08wt% CaO, 0.02wt% V 2 o 5 , 0.03 wt% HfO 2 , 0.1wt% SnO 2 , 0.1wt% CoO, and then carry out secondary sand grinding for 2 hours, spray granulation after adding PVA, and shape it into a standard annular magnetic core of Φ25 for sintering. At 1300°C for 5 hours, the oxygen partial pressure was maintained at 6%. Finally, the temperature was lowered from 1300°C to 100°C, and the equilibrium oxygen partial pressure was maintained during the cooling process.

[0028] Use the SY-8258 B-H tester to test the Bs of the sample at 50Hz, 1194A / m, and 100°C, and the result is 448mT; test the volume power consumption (Pcv) of the s...

Embodiment 3

[0033] Same as embodiment 1, just change main component into 54mol% Fe 2 o 3 , 7mol% ZnO, 39mol% MnO.

[0034] Use SY-8258 B-H tester to test the Bs of the sample at 50Hz, 1194A / m, and 100°C, and the result is 448mT; test the volume power consumption (Pcv) of the sample at 100kHz, 200mT, and the result is 300kW / m 3 .

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Abstract

The utility model provides a MnZn ferrite material with high saturation magnetic flux density and low power consumption, which improves the saturation magnetic flux density (Bs) and keeps the power consumption at a low level simultaneously. The material is a spinel polycrystalline structure and comprises the main compositions (calculated by the content of oxide) of 53.5-54.8mol% of Fe2O3, 38.5-44.5mol% of MnO, and 1.5-7.5mol% of ZnO; furthermore, the material also comprises SiO2 and CaO that are taken as a first auxiliary composition, comprises Nb2O5, Ta2O5, V2O5, ZrO2 and HfO2, wherein one or two combinations are taken as a second auxiliary composition, also comprises TiO2 and SnO2, wherein one or two combinations are taken as a third auxiliary composition, and also comprises CoO which is taken as a fourth auxiliary composition.

Description

technical field [0001] The invention relates to a MnZn ferrite material and a preparation method, in particular to a high saturation magnetic flux density and low power consumption MnZn ferrite material and a preparation method. Background technique [0002] MnZn ferrite can be used as a soft magnetic material and is widely used in power transformers, choke coils and other communication equipment and household appliances industries. When used in the power transformer core used in the frequency range of 100kHz to hundreds of kHz, compared with other ferrite materials and metal soft magnetic materials, MnZn ferrite has small power consumption and large saturation flux density, so MnZn ferrite Oxygen is an important material as a transformer core. [0003] However, with the miniaturization of electronic equipment and high output power of power supplies, and in order to be used normally under high temperature conditions, the saturation magnetic flux density (Bs) of ordinary MnZ...

Claims

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Application Information

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IPC IPC(8): H01F1/34C04B35/26
Inventor 颜冲吕东华陈文洪雷国莉包大新
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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