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Manganese zinc ferrite with characteristics of high temperature, low power consumption and high overlaying, and preparation method thereof

A manganese-zinc ferrite, high-superposition technology, applied in the direction of inorganic material magnetism, can solve the problems of poor DC superposition performance of transformer cores, transformer temperature rise, etc., and achieve the effect of widening the use frequency, stable output conditions, and small size

Active Publication Date: 2014-03-26
SUZHOU GUANDA MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention is to provide a high-temperature, low-loss, high-superposition manganese-zinc ferrite and its preparation method, which can solve the problems of poor DC superposition performance of existing transformer cores and excessive temperature rise of transformers after product assembly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A) Ingredients: Weigh 46.4mol iron oxide (according to Fe 2 o 3 ), 39.25 mol of manganese oxide (calculated as MnO) and 14.35 mol of zinc oxide (calculated as ZnO), put the above materials into the mixer, and dry mix them for 20 to 35 minutes at a speed of 40 to 45 rpm to obtain the main raw materials Mixture;

[0028] B) Pre-burning and crushing: The main raw material mixture obtained in step A) is introduced into the electric heating rotary kiln for pre-burning, and it is pre-fired at 850-910°C for 50-70 minutes. The frequency is 20-50 times / min, and the vibration amplitude is 3-5 mm, and the vibrating mill is crushed for 20-30 minutes to obtain a crushed material with an average particle diameter of 0.85-1.25 μm;

[0029] C) Sand milling: Put the pulverized material obtained in step B) into a sand mill, and add 500ppm CaCO to it 3 , 300ppm TiO 2 , 200ppm Co 2 o 3 , 100ppm ultrafine SiO 2 , 100ppm Cr 2 o 3 , 600ppm Nb 2 o 5 and 600ppm V 2 o 5 , then add w...

Embodiment 2

[0034] A) Ingredients: Weigh 51.35mol iron oxide (according to Fe 2 o 3 ), 41.45 mol of manganese oxide (calculated as MnO) and 7.2 mol of zinc oxide (calculated as ZnO), put the above materials into the mixer, and dry mix them for 20 to 35 minutes at a speed of 40 to 45 rpm to obtain the main raw materials Mixture;

[0035] B) Pre-burning and crushing: The main raw material mixture obtained in step A) is introduced into the electric heating rotary kiln for pre-burning, and it is pre-fired at 850-910°C for 50-70 minutes. The frequency is 20-50 times / min, and the vibration amplitude is 3-5 mm, and the vibrating mill is crushed for 20-30 minutes to obtain a crushed material with an average particle diameter of 0.85-1.25 μm;

[0036] C) Sand mill: put the pulverized material obtained in step B) into a sand mill, and add 3000ppm CaCO to it 3 , 80ppm TiO 2 , 1200ppm Co 2 o 3 , 200ppm ultrafine SiO 2 , 800ppm Cr 2 o 3 , 100ppm Nb 2 o 5 and 150ppm V 2 o 5 , then add wate...

Embodiment 3

[0041] A) Ingredients: Weigh 50.1mol iron oxide (according to Fe 2 o 3 ), 37.5 mol of manganese oxide (calculated as MnO) and 12.4 mol of zinc oxide (calculated as ZnO), put the above materials into a mixer, and dry mix them at a speed of 40 to 45 rpm for 20 to 35 minutes to obtain the main raw materials Mixture;

[0042] B) Pre-burning and crushing: The main raw material mixture obtained in step A) is introduced into the electric heating rotary kiln for pre-burning, and it is pre-fired at 850-910°C for 50-70 minutes. The frequency is 20-50 times / min, and the vibration amplitude is 3-5 mm, and the vibrating mill is crushed for 20-30 minutes to obtain a crushed material with an average particle diameter of 0.85-1.25 μm;

[0043] C) Sand milling: put the pulverized material obtained in step B) into a sand mill, and add 1700ppm CaCO to it 3 , 3000ppm TiO 2 , 50ppm Co 2 o 3 , 25ppm ultrafine SiO 2 , 1500ppm Cr 2 o 3 , 1500ppm Nb 2 o 5 and 600ppm V 2 o 5 , then add wat...

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Abstract

The invention discloses a manganese zinc ferrite with characteristics of high temperature, low power consumption and high overlaying, and a preparation method of the manganese zinc ferrite. The manganese zinc ferrite comprises ferric oxide, manganese oxide, zinc oxide, calcium carbonate, titanium oxide, cobaltous oxide, silicon oxide, chromic oxide, niobium oxide and vanadium oxide. The manganese zinc ferrite is prepared through the steps of material blending, preburning and crashing, sanding, preparation of granulation slurry, spray granulation, manufacturing of blanks, sintering and the like, and under the test condition of 100KHz 200mT, the power loss at the temperature of 100 DEG C is smaller than 260kw / m<3>, and the Bs at the temperature of 100 DEG C is larger than 420mT; a filter, a switch power source and a transformer application electronic product are partially made of magnetic materials, partial energy is consumed, and an electronic device which is wider in use field, smaller in size, more efficient and saving in energy can be provided for users, the use frequency of the materials is expanded, the loss is reduced, performance of components with magnetic cores applied can be improved largely, electronic products are made to be smaller and more efficient, and effective help is provided for adjustment of the national industrial structure, energy conservation and emission reduction.

Description

technical field [0001] The invention relates to the technical field of MnZn-based ferrites, in particular to a manganese-zinc ferrite with high temperature, low loss and high superposition characteristics and a preparation method thereof. Background technique [0002] With the rapid development of inverter transformers for high-performance computers, home appliances, and LCD (LED) displays, transformer cores are required to further reduce power consumption, and power ferrites with high DC superposition performance are required, especially for LED and LCD transformers. While maintaining high power, it meets the performance requirements of low loss and high efficiency, and can maintain temperature under different current superposition states. This type of transformer has a wide range of applications, covering home appliances, vehicles and large industrial equipment; it has high requirements for ferrite cores. On the one hand, it requires the product to have ultra-low loss char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/36C04B35/626C04B35/64
Inventor 柯宇翔张晓明徐良保
Owner SUZHOU GUANDA MAGNET
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