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A kind of nickel-zinc ferrite sheet and its coating process

A technology of nickel-zinc ferrite and ferrite green sheet, which is applied in the field of ferrite, can solve the problems of low production efficiency, and achieve the effects of reducing contact area, warping and cracking, and gap reduction

Active Publication Date: 2018-09-07
通道侗族自治县腾欣电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only be sintered in one piece, and the production efficiency is very low.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0017] A nickel-zinc ferrite sheet, comprising the following components (in parts by weight): 130 parts of nickel-zinc ferrite magnetic powder, 1-5 parts of dispersant, 10-20 parts of binder, The plasticizer is 1-5 parts, and the solvent is 30-50 parts. The proportion is mainly determined according to the characteristics of various components. Under the system of the present invention, the dispersant is mainly used to prevent the nickel-zinc ferrite magnetic powder from agglomerating during the ball milling process; the binder is mainly to mix the nickel-zinc ferrite The magnetic powder is bonded together to provide a certain strength for the green sheet. L...

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PUM

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Abstract

The invention provides a nickel zinc ferrite sheet material. The nickel zinc ferrite sheet material comprises, by weight, 130 parts of nickel zinc ferrite sheet material magnetic powder, 1 to 5 parts of a dispersant, 10 to 20 parts of a binding agent, 1 to 5 parts of a plasticizer, and 30 to 50 parts of a solvent. A novel film laminating method of the nickel zinc ferrite sheet material is adopted. According to the film laminating method, slurry tape casting is adopted to prepare a ferrite raw sheet material; the upper surface and the lower surface of the ferrite raw sheet material are coated with metal film via adhesion; and pressure equalizing is adopted for coarsening of the surfaces of the ferrite raw sheet material, so that warping and cracking caused by ingredient nonuniformity in sintering process are avoided, the contact area of layers with each is reduced, and adhesion of the nickel zinc ferrite sheet material with each other after sintering is avoided.

Description

technical field [0001] The invention belongs to the technical field of ferrite, and in particular relates to a preparation method of a nickel-zinc ferrite sheet. Background technique [0002] Mobile phone consumer electronics products have relatively high requirements on appearance, so NFC mobile phone antennas generally need to be built-in. However, the metal components in the phone will absorb the electromagnetic field, weakening the signal strength and causing the reading failure. Practice has shown that the sheet made of ferrite material with high magnetic permeability and low magnetic loss can solve this problem. [0003] In order to obtain nickel-zinc ferrite sheets, ferrite powder is mixed with binders, plasticizers, etc. to form a uniform slurry, and then made into ferrite green sheets. At this time, the formed ferrite green sheets will adhere to each other during the sintering process, and are also easily adhered to the setter plate. When separating the adhered ni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/30C04B35/622B28B1/29
CPCB28B1/29C04B35/265C04B35/622C04B2235/3279C04B2235/3284
Inventor 熊泽英
Owner 通道侗族自治县腾欣电子有限公司