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Nickel-zinc soft magnetic ferrite and preparation method thereof

A technology of soft magnetic ferrite and ferrite, which is applied in chemical instruments and methods, iron compounds, and the magnetism of inorganic materials. Effect of grain boundary resistivity and high uniformity

Inactive Publication Date: 2013-10-23
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the ferrite magnetic sheet in the prior art cannot achieve high magnetic permeability when the thickness is thin, the invention provides a nickel-zinc soft magnetic ferrite

Method used

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  • Nickel-zinc soft magnetic ferrite and preparation method thereof
  • Nickel-zinc soft magnetic ferrite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Fe in the main component 2 o 3 51.5mol% of NiO, 14.5mol% of NiO, 16mol% of ZnO, 17mol% of CuO, Al in auxiliary components 2 o 3 is 0.4mol%, V 2 o 5 0.2mol%, CaO 0.15mol%, MnO 2 0.1mol%, Bi 2 o 3 is 0.15mol%.

[0040] The preparation process is:

[0041] (1) Weigh the metal oxide raw material according to the above ratio, and wet ball mill it at a speed of 200r / min for 12h.

[0042] (2) Dry the powder after wet ball milling at 120°C for 4 hours.

[0043] (3) Pre-sinter the metal powder by raising the temperature to 1050°C at a heating rate of 2°C / min, and cool it with the furnace after holding for 2 hours.

[0044] (4) Secondary ball milling at 400r / min for 10h.

[0045] (5) Tape casting, the solvent used in the organic system is a mixture of ethanol and toluene, the binder is polyvinyl butyral, the plasticizer is dibutyl phthalate, and the thickness is 0.08 mm blank.

[0046] (6) Overlapping, keeping the pressure between the two layers of blanks at a pressu...

Embodiment 2

[0050] Main component Fe in this embodiment 2 o 3 52mol%, NiO 14.5mol%, ZnO 15mol%, CuO 17.5mol%, the auxiliary component Al 2 o 3 is 0.4mol%, V 2 o 5 0.2mol%, CaO 0.15mol%, MnO 2 0.1mol%, Bi 2 o 3 is 0.15mol%.

[0051] The preparation process is the same as in Example 1.

Embodiment 3

[0053] The main component of this example is Fe 2 o 3 51mol%, NiO 14.5mol%, ZnO 17mol%, CuO 16.5mol%, auxiliary component Al 2 o 3 is 0.4mol%, V 2 o 5 0.2mol%, CaO 0.15mol%, MnO 2 0.1mol%, Bi 2 o 3 is 0.15mol%.

[0054] The preparation process is the same as in Example 1.

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Abstract

A nickel-zinc soft ferrite is provided. The nickel-zinc soft ferrite comprises: a main component comprising 51-52 mol% of Fe2O3, 14.5-16 mol% of NiO, 15-18 mol% of ZnO, and 14-18 mol% of CuO; and an auxiliary component comprising A12O3, V2O5 and CaO. A method of producing the nickel-zinc soft ferrite is also provided.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic materials, and in particular relates to a nickel-zinc soft magnetic ferrite. Background technique [0002] At present, portable information terminals such as mobile phones are developing toward miniaturization and compactness, and metal components are installed in small housings with high density. Therefore, the antenna module for the non-contact IC tag installed in the housing of the portable information terminal is affected by metal elements, and the communication performance is poor, resulting in a shorter communication distance of the antenna module installed in the housing than the antenna module installed outside the housing. The reason for this phenomenon is that the metal parts in the casing produce eddy current effects under the action of high-frequency electromagnetic fields, which affect the communication of the antenna module. [0003] In order to increase the communication dist...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/34
CPCC01P2002/52C01G49/0063C01G49/00B32B18/00C04B35/26C04B35/6261C04B35/634C04B2235/3208C04B2235/3217C04B2235/3239C04B2235/3267C04B2235/3279C04B2235/3281C04B2235/3284C04B2235/3298C04B2235/5436C04B2235/6027C04B2235/6562C04B2237/34C04B2237/704
Inventor 徐斌向其军
Owner BYD CO LTD
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