A kind of nickel-zinc-copper soft ferrite and preparation method thereof

A soft ferrite and magnetic ferrite technology, applied in the field of nickel-zinc-copper soft ferrite and its preparation, can solve the problem of high loss of soft ferrite, achieve low loss requirements, and reduce loss performance

Inactive Publication Date: 2011-11-30
BYD CO LTD
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Problems solved by technology

[0005] The present invention solves the problem of high los

Method used

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Embodiment Construction

[0017] A kind of nickel-zinc-copper soft ferrite, said nickel-zinc-copper soft ferrite comprises main component and auxiliary component, and said main component is iron oxide, nickelous oxide, zinc oxide, copper oxide, and the content of said main component as follows:

[0018] Iron oxide 65.05wt~66.35wt%

[0019] Zinc oxide 20.66wt~22.20wt%

[0020] Nickel oxide 9.55wt~10.06wt%

[0021] Copper oxide 2.91wt~3.17wt%

[0022] The secondary component includes tungsten trioxide, and the content of the tungsten trioxide is 0.003wt-0.03wt%.

[0023] Preferably, the auxiliary component further contains bismuth oxide, and the content of the bismuth oxide is 0.01wt-0.03wt%. The inventors of the present invention have found through a large number of experiments that when the content of bismuth oxide is in the lower range of 0.01wt-0.03wt%, the diffusion and mass transfer of atoms can be promoted during the solid phase reaction, thereby promoting the sintering. In the prior art, the...

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Abstract

The invention provides a nickel-zinc-copper soft ferrite and a preparation method thereof. The nickel-zinc-copper soft ferrite includes main components and auxiliary components, and the main components are iron oxide, nickelous oxide, zinc oxide, oxide Copper, characterized in that the content of the main components is as follows: iron oxide 65.05wt-66.35wt%; zinc oxide 20.66wt-22.20wt%; nickelous oxide 9.55wt-10.06wt%; copper oxide 2.91wt-3.17wt% ; The secondary component includes tungsten trioxide, and the content of the tungsten trioxide is 0.003wt-0.03wt%. The electromagnetic properties of the material in the invention reduce the loss performance of the product under the premise of maintaining high initial magnetic permeability and saturation magnetic flux density.

Description

technical field [0001] The invention relates to a nickel-zinc-copper soft ferrite and a preparation method thereof. Background technique [0002] The most widely used soft magnetic materials are MnZn ferrite and NiZn ferrite. Manganese zinc ferrite has the advantages of high saturation magnetic induction and permeability, and low loss at low frequency, but it also has the disadvantages of low resistivity and the need for atmosphere protection during sintering. The resistivity of nickel-zinc ferrite material is 3-8 orders of magnitude higher than that of manganese-zinc ferrite material, which is more suitable for high-frequency stage, with small high-frequency loss, especially suitable for high-frequency 1-300MHz, and has no Atmospheric protection is required. [0003] With the continuous advancement of science and technology, electronic devices are becoming more and more high-frequency and low-loss, such as inductors, transformers, and switching power supplies, etc. Soft m...

Claims

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Application Information

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IPC IPC(8): H01F1/34C04B35/622C04B35/64
Inventor 苟黎刚周俊东王进军
Owner BYD CO LTD
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