Nickel-zinc ferrite material and preparation method thereof

A technology of nickel-zinc ferrite and materials, which is applied in the fields of magnetic materials, inorganic material magnetism, inductance/transformer/magnet manufacturing, etc., and can solve the problems of narrow operating frequency range and high magnetic loss

Active Publication Date: 2021-01-08
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, domestic nickel-zinc ferrite materials mainly seek to improve the initial magnetic permeability at 1MHz, and the frequency range of use is often narrow, which will lead to high magnetic loss. With the miniaturization of electronic devices, the requirements for high frequency are increasing. The more urgent, the market needs a nickel-zinc ferrite material with high resonance frequency and low loss, so that this material can be better used in radio frequency devices, and can improve the overall performance of the device

Method used

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  • Nickel-zinc ferrite material and preparation method thereof
  • Nickel-zinc ferrite material and preparation method thereof
  • Nickel-zinc ferrite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0071] The preparation method of this example nickel-zinc ferrite material comprises the following steps:

[0072] 1. Ingredients: According to the following composition, Fe 2 o 3 50mol%, NiO 12.5mol%, ZnO 21.5mol%, Co 3 o 4 is 6mol%, and the balance is CuO, and the main ingredients are prepared by weighing each component.

[0073] 2. Primary ball milling: put the weighed main material into the ball mill, add 0.05wt% MnCO 3 and 0.05wt% CaCO as the main ingredient 3 Mix, and ball mill for 2 hours according to the mass ratio of mixture and deionized water 1:1.5.

[0074] 3. Pre-burning: Dry the material after ball milling once, put it into the furnace for pre-burning, the pre-burning temperature is 800°C, and the holding time is 4 hours. After pre-burning, it is cooled with the furnace to obtain the pre-fired material.

[0075] 4. Crushing: Coarsely crush the calcined material and pass through a 60-mesh sieve.

[0076] 5. Secondary ball milling: add 0.15wt% Bi to the crus...

Embodiment 2

[0081] The preparation method of this example nickel-zinc ferrite material comprises the following steps:

[0082] 1. Ingredients: According to the following composition, Fe 2 o 3 50mol%, NiO 12.5mol%, ZnO 21.5mol%, Co 3 o 4 is 6mol%, and the balance is CuO, and the main ingredients are prepared by weighing each component.

[0083] 2. Primary ball milling: put the weighed main material into the ball mill, add 0.05wt% MnCO 3 and 0.05wt% CaCO as the main ingredient 3 Mix, and ball mill for 2 hours according to the mass ratio of mixture and deionized water 1:1.5.

[0084] 3. Pre-burning: Dry the material after ball milling once, put it into the furnace for pre-burning, the pre-burning temperature is 800°C, and the holding time is 4 hours. After pre-burning, it is cooled with the furnace to obtain the pre-fired material.

[0085] 4. Crushing: Coarsely crush the calcined material and pass through a 60-mesh sieve.

[0086] 5. Secondary ball milling: add 0.15wt% Bi to the crus...

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Abstract

The invention discloses a nickel-zinc ferrite material and a preparation method thereof. The nickel-zinc ferrite material comprises main components and auxiliary components, wherein the main components consist of the following components in percentage by mole: 48%-51% of Fe oxide, 12%-18% of Ni oxide, 15%-23% of Zn oxide and 4%-7% of Co oxide, with the balance being Cu oxide; and the auxiliary components comprise a Mn compound and a Ca compound. The nickel-zinc ferrite provided by the invention has the characteristics of wide applicable frequency range, high magnetic conductivity peak frequency, small specific loss coefficient, high saturation magnetization, low coercive force and high Curie temperature, and presents wide application prospects.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a nickel-zinc ferrite material and a preparation method thereof. Background technique [0002] With the development of information technology and digitalization of electronic products, new requirements are put forward for soft ferrite materials and components, such as the miniaturization, integration and high frequency of devices, especially the wide application of radio frequency broadband devices, which further promotes Development of RF broadband materials. Above 1MHz, NiZn ferrite has been widely used due to its high resistivity, high Bs, and high magnetic permeability. [0003] At present, domestic nickel-zinc ferrite materials mainly seek to improve the initial magnetic permeability at 1MHz, and the frequency range of use is often narrow, which will lead to high magnetic loss. With the miniaturization of electronic devices, the requirements for high frequency ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/30H01F1/34H01F41/02
CPCC04B35/2633C04B35/265H01F1/344H01F41/02C04B2235/3279C04B2235/3284C04B2235/3275C04B2235/3281C04B2235/3262C04B2235/442C04B2235/3298C04B2235/3251C04B2235/96
Inventor 史慧刚蔡庚轩薛德胜
Owner LANZHOU UNIVERSITY
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