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MnZn ferrite material of low loss and high saturation magnetic flux density and preparation method of MnZn ferrite material

A technology of ferrite material and magnetic flux density, applied in the field of MnZn ferrite material and its preparation, low loss and high saturation magnetic flux density MnZn ferrite material and its preparation field, can solve problems such as NiO addition research, achieve Increased saturation magnetic flux density, improved low loss, and reasonable design effects

Inactive Publication Date: 2014-08-06
苏州天源磁业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent applications (CN200810236002.5), (CN200810163736.5), (CN200610051942.8), (CN201110213879.4), (CN201110375322.0), (CN200610051943.2), etc. by selecting the main formula composition, additive design and sintering method to increase the saturation flux density of MnZn ferrites, but the addition of NiO has not been studied in detail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] will consist of 54.0mol% Fe 2 O 3 , 6.0 mol% ZnO, 36.0 mol% MnO and 4.0 mol% NiO were mixed in a sand mill for 1 hour, and then pre-fired at 850 °C for 2 hours. Based on the quality of the powder after pre-sintering, add auxiliary components to the above-mentioned pre-sintering materials, and the auxiliary components added are: 150ppm SiO 2 , 1000ppm CaCO 3 , 400ppm Nb 2 O 5 , 1000ppm SnO 2 , 200ppm ZrO 2 and 800ppm Co 2 O 3 . Then carry out secondary sand grinding for 2 hours, add PVA, spray granulation, and shape into a standard ring magnetic core of Φ25 for sintering. Incubate at 1300°C for 5 hours, maintaining the partial pressure of oxygen at 10%.

[0020] Use the CH2335 loss tester to test the loss of the sample at 100kHz, 200mT, 100℃, and the result is 315kW / m 3 , with SY-8219 type B-H tester at 50Hz, 1200A / m, 100°C to test the Bs of the sample, the result is 471mT.

Embodiment 2

[0024] will consist of 54.5mol% Fe 2 O 3 , 6.5 mol % ZnO, 36.2 mol % MnO and 2.8 mol % NiO were mixed in a sand mill for 1 hour, and then pre-fired at 850 °C for 2 hours. Based on the quality of the powder after pre-sintering, add auxiliary components to the above-mentioned pre-sintering materials, and the auxiliary components added are: 150ppm SiO 2 , 800ppm CaCO 3 , 300ppm Nb 2 O 5 , 800ppm SnO 2 , 300ppm ZrO 2 and 700ppm Co 2 O 3 . Then carry out secondary sand grinding for 2 hours, add PVA, spray granulation, and shape into a standard ring magnetic core of Φ25 for sintering. Incubate at 1300°C for 5 hours, maintaining the partial pressure of oxygen at 10%.

[0025] Use the CH2335 loss tester to test the loss of the sample at 100kHz, 200mT, 100℃, and the result is 298kW / m 3 , with the SY-8219 B-H tester at 50Hz, 1200A / m, 100 ℃ to test the Bs of the sample, the result is 475mT.

Embodiment 3

[0029] will consist of 55mol% Fe 2 O 3 , 6.3 mol % ZnO, 36.5 mol % MnO and 2.2 mol % NiO were mixed in a sand mill for 1 hour, and then pre-fired at 850 °C for 2 hours. Based on the quality of the powder after pre-sintering, add auxiliary components to the above-mentioned pre-sintering materials, and the auxiliary components added are: 200ppm SiO 2 , 800ppm CaCO 3 , 250ppm Nb 2 O 5 , 800ppm SnO 2 , 200ppm ZrO 2 and 900ppm Co 2 O 3 . Then carry out secondary sand grinding for 2 hours, add PVA, spray granulation, and shape into a standard ring magnetic core of Φ25 for sintering. Incubate at 1300°C for 5 hours, maintaining the partial pressure of oxygen at 10%.

[0030] Using the CH2335 loss tester to test the loss of the sample at 100kHz, 200mT, 100℃, the result is 281kW / m 3 , with SY-8219 type B-H tester at 50Hz, 1200A / m, 100℃ to test the Bs of the sample, the result is 478mT.

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Abstract

The invention discloses a MnZn ferrite material of low loss and high saturation magnetic flux density and a preparation method of the MnZn ferrite material. The ferrite material is composed of major ingredients and accessory ingredients. The contents of the major ingredients calculated by oxides are as follows: 53 to 55 mol % of Fe2O3, 6 to 8 mol % of ZnO, 35 to 37 mol % of MnO and 1 to 4 mol % of NiO; the accessory ingredients calculated by the total weight of the major ingredients are as follows: 100 to 250 ppm of SiO2, 150 to 1,600 ppm of CaCO3, 50 to 500 ppm of Nb2O5, 50 to 300 ppm of ZrO2, 200 to 6,000 ppm of SnO2 and 500 to 2,000 ppm of Co2O3. The MnZn ferrite material and the preparation method thereof have the advantages that the design is reasonable, the low loss of magnetic cores and the improvement of saturation magnetic flux density can be realized by utilizing the conventional manufacturing equipment, and the dc superposition characteristic and energy storage property are favorable.

Description

technical field [0001] The invention belongs to the field of soft ferrite materials, in particular to a MnZn ferrite material and a preparation method thereof, in particular to a low loss and high saturation magnetic flux density MnZn ferrite material and a preparation method thereof. Background technique [0002] With the popularization of portable mobile electronic devices, the rapid development of multimedia communications and digital networks, as well as the needs of electromagnetic compatibility and anti-electromagnetic interference fields, higher and updated requirements are currently placed on power ferrite materials. With the expansion of emerging application fields, in addition to low losses, high saturation magnetic flux density is also required for power MnZn ferrites. For the preparation of MnZn ferrite with low loss and high saturation magnetic flux density, in addition to selecting the appropriate main formula design, appropriate trace additives and their combi...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622
Inventor 高庞李思秋陶佳栋张建明王育伟张维
Owner 苏州天源磁业股份有限公司
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