High-frequency nickel-copper-zinc ferrite and preparation thereof

A technology for nickel-copper-zinc ferrite and ferrite, which is applied in the field of nickel-copper-zinc ferrite and its preparation, can solve the problems of high requirements, high sintering temperature and high energy consumption, and achieves reduced loss, stable preparation process, The effect of reducing energy consumption in the production process

Inactive Publication Date: 2009-04-22
TDG HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high sintering temperature of the material, the energy consumption in the production process is high, and the requirements for the sintering kiln of the production equipment are also high

Method used

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  • High-frequency nickel-copper-zinc ferrite and preparation thereof
  • High-frequency nickel-copper-zinc ferrite and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 48% mol Fe 2 o 3 , 40% mol of NiO, 8% mol of ZnO and 4% mol of CuO. After mixing the above main components, add them to a sand mill and mix them for 30 minutes. After spray drying, send them to the rotary kiln for pre-calcination at 830°C±10°C for 30 minutes. Then add auxiliary components to the calcined material and put them into a sand mill for crushing. The crushing time is 150 minutes. The particle size of the slurry after crushing is controlled at 1.0 μm to 1.5 μm; The content of the standard substance is respectively (wt%): Co 2 o 3 : 0.75, Bi 2 o 3 : 2.5, SiO 2 : 2.5. 35% of pure water, as well as dispersant and defoamer need to be added in the process of mixing sand milling and crushing sand milling. Finally, 1.5% PVA is added to the abrasive slurry, and then the nickel-copper-zinc ferrite particles are obtained by spraying and granulating in a spray tower.

[0028] Take 2.4 grams of the pellets and press them into a ring magnetic core of Φ12.7mm×...

Embodiment 2

[0031] Weigh 48.2% mol Fe 2 o 3 , 39.8% mol of NiO, 8% mol of ZnO and 4% mol of CuO. After mixing the above main components, add them to a sand mill and mix them for 30 minutes. After spray drying, send them to the rotary kiln for pre-calcination at 830°C±10°C for 30 minutes. Then add auxiliary components to the calcined material and put them into a sand mill for crushing. The crushing time is 150 minutes. The particle size of the slurry after crushing is controlled at 1.0 μm to 1.5 μm; The content of the standard substance is respectively (wt%): Co 2 o 3 : 0.75, Bi 2 o 3 : 2.5, SiO 2 : 2.5. 35% of pure water, as well as dispersant and defoamer need to be added in the process of mixing sand milling and crushing sand milling. Finally, 1.5% PVA is added to the abrasive slurry, and then the nickel-copper-zinc ferrite particles are obtained by spraying and granulating in a spray tower.

[0032]Take 2.4 grams of the pellets and press them into a ring magnetic core of Φ12.7...

Embodiment 3

[0035] Weigh 48.4% mol Fe 2 o 3 , 39.6% mol of NiO, 8% mol of ZnO and 4% mol of CuO. After mixing the above main components, add them to a sand mill and mix them for 30 minutes. After spray drying, send them to the rotary kiln for pre-calcination at 830°C±10°C for 30 minutes. Then add auxiliary components to the calcined material and put them into a sand mill for crushing. The crushing time is 150 minutes. The particle size of the slurry after crushing is controlled at 1.0 μm to 1.5 μm; The content of the standard substance is respectively (wt%): Co 2 o 3 : 0.75, Bi 2 o 3 : 2.5, SiO 2 : 2.5. 35% of pure water, as well as dispersant and defoamer need to be added in the process of mixing sand milling and crushing sand milling. Finally, 1.5% PVA is added to the abrasive slurry, and then the nickel-copper-zinc ferrite particles are obtained by spraying and granulating in a spray tower.

[0036] Take 2.4 grams of the pellets and press them into a ring magnetic core of Φ12....

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Abstract

The invention relates to a high frequency nickel-copper-zinc ferrite and a method for preparing the same, which belong to the technical field of nickel series soft magnetism ferrite. The main components of the ferrite are ferric oxide, nickel oxide, zinc oxide, and copper oxide, the accessory components comprise cobalt oxide, bismuth oxide, and silicon oxide, and the ferrite is prepared by an oxide method. The invention adopts an iron deficiency formulation, a low calcination temperature, and a low sintering temperature so that the prepared high frequency nickel-copper-zinc ferrite has good performances of low initial permeability, low relative dissipation factor between 50MHz and 200MHz, and high Curie temperature, and can better satisfy the use requirement of communication electronic parts and components; besides, the preparation process is stable, and the production process has low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of nickel-based soft magnetic ferrite, and specifically relates to a nickel-copper-zinc ferrite suitable for low-temperature sintering, low initial magnetic permeability, low high-frequency loss, high Curie temperature, and high-frequency application and a preparation method thereof. Background technique [0002] Ferrite materials are widely used in electronic equipment such as communications, digital electronics, and household appliances. As a main series of ferrite, nickel-based ferrite has a very large application market in communication devices because of its good high-frequency performance. With the continuous development of electronic devices in the direction of miniaturization and portability, nickel-based ferrite materials are also developing in the direction of high frequency; especially in the field of communication applications. [0003] High-frequency nickel-based ferrite has the characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 张瑞标王勤峰邵峰
Owner TDG HLDG CO LTD
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