Material powder of manganese-zinc power soft magnet ferrite and its preparation method

A soft ferrite and power technology, applied in the field of soft magnetic materials, can solve the problems of large power loss and low adaptive frequency, and achieve the effects of high working temperature, high saturation magnetic induction intensity and low power consumption

Inactive Publication Date: 2003-10-08
SHANGHAI BAOSTEEL MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, R2KB1, R2KDB, and R2KB3 developed by 898 factories, 9 institutes, and 899 factories meet or approach the third-generatio...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 70wt% Fe 2 o 3 , 23wt% Mn 3 o 4 , 7wt% ZnO, of which the iron red is made of domestic Baosteel red (see Table 1 for properties). Put it into a vibrating ball mill, mix for 25 minutes, put it into a rotary kiln, and pre-fire it at a temperature of 900°C for 30 minutes. Then enter the vibrating ball mill for coarse crushing for 30 minutes, and then put it into a sand mill for fine crushing for 60 minutes. Add 35wt% of pure water, 0.2wt% of dioctyl phosphate, 0.6wt% of polyvinyl alcohol and 0.01wt% of defoamer during the sanding process. And add the additive SiO 2 0.003wt%, CaCO 3 0.018wt%, V 2 o 5 0.090wt%, Nb 2 o 5 0.050 wt%. Finally, spray granulation to obtain Mn-Zn ferrite powder.

[0026] Take the powder 18g with 6000kgf / cm 2 pressure molding to obtain a ring shaped body with a diameter of 35.5 cm and a height of 14 cm. Sintering at a temperature of 1350°C for 4 hours to form a Mn-Zn ferrite sintered body.

[0027] Use the SY8232 tester to test...

Embodiment 2

[0029] Weigh 67wt% Fe 2 o 3 , 24wt% Mn 3 o 4 , 9% ZnO, put into a ball mill and mix for 20 minutes, pre-fired at a temperature of 950 ° C, and the pre-fired time was 35 minutes. Then enter the vibrating ball mill for coarse crushing for 35 minutes, and then put it into a sand mill for fine crushing for 50 minutes. During the sanding process, 38wt% of pure water, 0.3wt% of dioctyl phosphate, 0.7wt% of polyvinyl alcohol and 0.01wt% of defoamer should be added. And add the additive SiO 2 0.005wt%, CaCO 3 0.016wt%, Nb 2 o 5 0.055 wt%. Finally, spray granulation to obtain Mn-Zn ferrite powder.

[0030] Take the powder 18g with 6000kgf / cm 2 pressure molding to obtain a ring shaped body with a diameter of 35.5 cm and a height of 14 cm. Sinter in the same sintering manner as in Example 1 to obtain a Mn-Zn ferrite sintered body.

[0031] Use the SY8232 tester to test the power consumption of the sintered body at the temperature shown in Table 2, which is listed in Table 2...

Embodiment 3

[0033] Weigh 68% Fe 2 o 3 , 24% Mn 3 o 4 , 8% ZnO, mixed with a vibrating ball mill for 30 minutes, pre-fired at a temperature of 920 ° C, and the pre-fired time was 38 minutes. Then use a vibrating ball mill to pulverize roughly for 30 minutes, and then put it into a sand mill for fine pulverization for 55 minutes. During the sanding process, 30 wt% of pure water, 0.15 wt% of dioctyl phosphate, 0.55 wt% of polyvinyl alcohol and 0.01 wt% of defoamer should be added. And add the additive CaCO 3 0.015wt%, V 2 o 5 0.086wt%, Nb 2 o 5 0.060 wt%. Finally, spray granulation to obtain Mn-Zn ferrite powder.

[0034] Take the powder 18g with 6000kgf / cm 2 pressure molding to obtain a ring shaped body with a diameter of 35.5 cm and a height of 14 cm. Sinter in the same sintering manner as in Example 1 to obtain a Mn-Zn ferrite sintered body.

[0035] Use the SY8232 tester to test the power consumption of the sintered body at the temperature shown in Table 2, which is listed...

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Abstract

Manganese-zinc soft magnetic ferrite material powder is made through five working procedures: admixture, preburning, coarse cracking, sand mill and spraying-granulation by using Fe2O3, Mn3O4, and ZnOas main materials. The produced material powder has advantages of lower power consumption, high saturation induction density Bs, low cost and superior performances.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic materials, and in particular relates to a manganese-zinc power soft magnetic ferrite material powder and a preparation method thereof. Background technique [0002] Internationally, Japanese and European manufacturers developed the first generation of LPL (power soft ferrite) in the early 1970s. Typical brands include H3S, FDK's H45 and Philips' 3C8, which are generally only used for civilian switching power supplies at around 20kHz; In the late 1970s and early 1980s, foreign countries launched the improved second-generation LPL; in the middle and late 1980s, foreign countries competed to develop third-generation materials with greatly reduced high-frequency power consumption and practical frequencies generally up to 100-500kHz, such as TDK's H7C4 (PC40), FDK's H63B and H45C, Siemens' N47 and N67, Philips' 3F3, in addition to making traditional EE, EI, EC cores, there are also ETD, PQ, RM co...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/36
Inventor 陈卫锋孔毅陆麒发仇学同刘国平徐辉宇顾燮峰黄子谦冯炜唐俊睿
Owner SHANGHAI BAOSTEEL MAGNETICS
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