Preparation method of anti-metal nickel copper zinc ferrite separating magnetic sheet material

A technology of nickel-copper-zinc ferrite and magnetic isolation sheet, which is applied in the field of electronic materials, can solve the problems of reducing material permeability, resource waste environment, and low crystallinity, so as to reduce magnetic domain resonance loss, improve crystallization degree, Effect of Improving Magnetic Permeability

Active Publication Date: 2016-01-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The magnetism of the metal-resistant nickel-copper-zinc ferrite magnetic barrier is mainly derived from the nickel-copper-zinc spinel phase in the material. In industrial production, the nickel-copper-zinc spinel phase is usually prepared by secondary sintering of oxides, but the The crystallinity of the material obtained by the method is not high, which will reduce the magnetic permeability of the material; at the same time, the ferrite magnetic sheet waste generated in the production process has caused resource waste and environmental pollution

Method used

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  • Preparation method of anti-metal nickel copper zinc ferrite separating magnetic sheet material
  • Preparation method of anti-metal nickel copper zinc ferrite separating magnetic sheet material

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Embodiment 1

[0032] A method for preparing a metal-resistant nickel-copper-zinc ferrite magnetic isolation sheet material, comprising the following steps:

[0033] Step 1: Weigh the raw materials of the main components in proportion, and the content of the main components in terms of their respective standards is: 49.6mol% Fe 2 o 3 , 16.7mol% NiO, 25.2mol% ZnO, 8.5mol% CuO; the raw materials were ball milled in a planetary ball mill for 2h at a speed of 250r / min, and the mass ratio of raw materials, water and steel balls was 1:1.5:3, of which steel The diameter of the ball is 6.5mm;

[0034] Step 2: Dry the powder obtained in step 1 at 80°C in an oven, grind and pulverize it, and then place it in a sintering container for pre-sintering treatment at a pre-sintering temperature of 850°C and a holding time of 3 hours to obtain a pre-sintered material;

[0035]Step 3: Processing of magnetic fragments: Wash and dry the magnetic fragments, and ball mill them in a planetary ball mill for 10 hou...

Embodiment 2

[0046] The difference between this embodiment and embodiment 1 is that when mixing and ball milling in step 4, the mass percentage of the main component is 80 wt%, and the mass percentage of the magnetic scrap is 20 wt%, and the rest of the steps are the same as in embodiment 1.

Embodiment 3

[0048] The difference between this embodiment and embodiment 1 is that when mixing and ball milling in step 4, the mass percentage of the main component is 71.4 wt%, and the mass percentage of the magnetic fragments is 28.6 wt%, and the rest of the steps are the same as in embodiment 1.

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Abstract

Belonging to the field of electronic materials, the invention relates to a preparation method of an anti-metal nickel copper zinc ferrite separating magnetic sheet material. The method includes: weighing raw materials according to the proportion of less than or equal to 50.4mol% and greater than or equal to 49.5mol% of Fe2O3, less than or equal to 17.9mol% and greater than or equal to 16mol% of NiO, less than or equal to 25.9mol% and greater than or equal to 24mol% of ZnO, less than or equal to 10.4mol% and greater than or equal to 8.5mol% of CuO, conducting first ball milling and presintering to obtain a pre-sintered material; adding crushed magnetic sheet and CoO auxiliary component, and performing second ball milling and sintering so as to obtain the anti-metal nickel copper zinc ferrite separating magnetic sheet. The crushed magnetic sheet is the broken material of magnetic sheet obtained after second sintering of the main components and auxiliary component powder. The anti-metal nickel copper zinc ferrite separating magnetic sheet obtained by the method provided by the invention has high magnetic conductivity and low magnetic loss. And the method makes effective use of the crushed magnetic sheet in industrial production, save resources, and avoids environmental pollution.

Description

technical field [0001] The invention belongs to the field of electronic materials, and in particular relates to a preparation method of a metal-resistant nickel-copper-zinc ferrite magnetic isolation sheet material used for information and energy exchange equipment. Background technique [0002] With the rapid development of the electronic information industry, the functions of electronic products are becoming more and more diversified, and people's demand for the safety and convenience of electronic products is also increasing. There are more and more, mainly including near-field wireless communication (NFC), wireless charging (WPC), radio frequency identification (RFID), etc. Its characteristics are: the working frequency is between 100KHz and 1GHz, the communication distance is less than 100 meters, and the coil coupling is used. communication and energy exchange. This kind of short-distance information and energy exchange electronic equipment is used in terminal equipme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 梁迪飞周小龙李维佳董从根陈志科邓龙江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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