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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AI-Extracted 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 m...

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Method used

Nickel-zinc soft magnetic ferrite of the present invention has higher Fe2O3 content, the Fe2+ ion that produces in the sintering process compensates the magnetic crystal anisotropy constant of ferrite by its positive magnetic crystal anisotropy constant, reaches to improve The purpose of magnetic permeability; and the increase of Fe2+ will increase the magnetic sheet resistance, resulting in an increase in magnetic loss. The present invention increases the content of CuO at the same time, which can effectively reduce the magnetic sheet resistance, thereby reducing magnetic loss. However, because the increase of CuO content makes the crystal grains grow abnormally after sintering, which affects the magnetic and mechanical properties of ferrite, the present invention adds a...

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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.

Application Domain

Inorganic material magnetismIron compounds +1

Technology Topic

MagnetNickel zinc +2

Image

Examples

Experimental program(5)
Comparison scheme(2)
Effect test(1)

Example Embodiment

[0038] Example 1:

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

[0040] The preparation process is:

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

[0042] (2) Dry the powder after wet ball milling at 120℃ for 4h.

[0043] (3) The metal powder is pre-sintered by heating to 1050°C at a heating rate of 2°C/min. After holding for 2 hours, it is cooled with the furnace.

[0044] (4) The second ball milling is performed at 400r/min for 10h.

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

[0046] (6) Laminating, keeping the pressure between the two layers of green sheets at 30MPa for 5 minutes.

[0047] (7) The laminated blanks are diced by a half-cutting process, and a continuous 2mm×2mm grid structure is formed on the surface of the blanks with a hot cutting machine, and the cutting depth is 1/3 of the thickness of the blanks.

[0048] (8) The finished product is sintered. At a heating rate of 1°C, the temperature is raised to 250°C for 60 minutes, 600°C for 60 minutes, 900°C for 30 minutes, and the highest temperature is 1050°C. The temperature is kept for 120 minutes, and then cooled in the furnace. The thickness of the finished product after sintering is 0.10±0.01mm.

Example Embodiment

[0049] Example 2:

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

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

Example Embodiment

[0052] Example 3:

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

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

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

High permeability
Improve uniformity

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

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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