Preparation method of high-temperature, high-frequency and low-loss ferrite material

A ferrite material and low-loss technology, applied in the field of ferrite material preparation, can solve the problem of low power loss and achieve the effect of low power loss, low power loss, and reduced power loss

Inactive Publication Date: 2020-12-25
深圳京鲁计算科学应用研究院
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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-temperature, high-frequency, low-loss ferrite material preparation method, aiming to solve the problem in the prior art that the ferrite material preparation method is difficult to achieve low power loss under high temperature and high frequency conditions

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  • Preparation method of high-temperature, high-frequency and low-loss ferrite material

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[0028] A method for preparing a high-temperature, high-frequency, low-loss ferrite material, comprising the following preparation steps:

[0029] 1), using a formula of 52-58 mol% ferric oxide, 9-13 mol% zinc oxide, 0.5-5 mol% nickel oxide, and 31-38 mol% manganese carbonate to mix and grind evenly to form grinding powder;

[0030] 2), pre-calcining the ground powder obtained in step 1) at a temperature of 950-1050° C. to form a fired powder;

[0031] 3), add the following additives to the fired powder obtained in step 2) according to the mass ratio: tin dioxide, titanium dioxide and vanadium pentoxide, and grind again, so that the particle size of the ground powder reaches the primary level of submicron Powder;

[0032] 4), adding an organic binder to the primary powder obtained in step 3), and granulating the primary powder into a granular blank;

[0033] 5) The granular blank obtained in step 4) is placed in a sintering furnace for high-temperature sintering for several h...

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Abstract

The invention relates to the technical field of ferrite materials, and discloses a preparation method of a high-temperature high-frequency low-loss ferrite material, which comprises the following steps: 1) mixing and grinding 52-58 mol% of ferric oxide, 9-13 mol% of zinc oxide, 0.5-5 mol% of nickel oxide and 31-38 mol% of manganese carbonate to form ground powder; 2) presintering the ground powderat the temperature of 950-1050 DEG C to form fired powder; 3) adding stannic oxide, titanium dioxide and vanadium pentoxide into the fired powder according to a mass ratio, and grinding the primary powder of which the particle size reaches a sub-micron level again; 4) adding an organic adhesive into the primary powder, and forming into granular blanks; and 5) placing the granular blank in a sintering furnace for high-temperature sintering for several hours to form a high-temperature high-frequency low-loss ferrite material; so that the purpose of reducing power loss under high-temperature andhigh-frequency conditions is achieved.

Description

technical field [0001] The patent of the present invention relates to the technical field of ferrite materials, specifically, to a method for preparing ferrite materials with high temperature, high frequency and low loss. Background technique [0002] The ferrite material is a MnNiZn-based ferrite material containing a predetermined amount of ferric oxide, manganese oxide, zinc oxide, and nickel oxide as its main component, and further contains a predetermined amount of bismuth oxide, magnesium oxide, and cobalt oxide, Since the ferrite material is constituted in this way, the ferrite material can provide a MnNiZn-based ferrite material with extremely good temperature characteristics (small change rate of magnetic permeability with respect to temperature change), high quality factor Q, and high strength. [0003] At present, the preparation process of ferrite materials needs to go through the following steps, which are formulating, primary ball milling, pre-sintering, doping...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/626C04B35/632C04B35/64
CPCC04B35/265C04B35/622C04B35/6261C04B35/64C04B35/632C04B2235/3284C04B2235/3279C04B2235/442C04B2235/3293C04B2235/3239C04B2235/3232
Inventor 王永安张瑞勤何芳
Owner 深圳京鲁计算科学应用研究院
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