A kind of low SFD magnetic recording material and preparation method thereof

A magnetic recording and oxide technology, applied in the field of magnetic information materials, can solve problems such as restricting applications, and achieve the effects of ensuring magnetic properties, refining particle size, and improving uniform dispersion.

Active Publication Date: 2021-05-25
BGRIMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the SFD is relatively high, which limits its application in some fields

Method used

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  • A kind of low SFD magnetic recording material and preparation method thereof

Examples

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preparation example Construction

[0058]The present invention also provides a method of preparing a magnetic recording material of the low SFD, comprising the steps of:

[0059]The raw materials were blended, densely treated, 1-4 h at 1-4h at 1000-1200 ° C, rough crushed, and refurbished from 920-1000 ° C for 1-4 h, and the magnetic recording material was obtained.

[0060]In a preferred embodiment of the invention, the gradient is warmed for 1-4 h at 1000-1200 ° C gradient. More preferably, at 1000-1050 ° C pre-fertilized 0.5-1 to 1060-1100 ° C, the temperature is 10.50 to 1200 ° C. 0.5-2 h.

[0061]In a preferred embodiment of the invention, the dense process comprises: dense processing of 30-90s using a mine mill.

[0062]In a preferred embodiment of the invention, the ball of the ball is from 50 to 500 μm.

[0063]In a preferred embodiment of the invention, the crude crushing to a particle size of 2.0 to 2. μm after pre-feave.

[0064]In a preferred embodiment of the invention, the fine milling method comprises: wet fine milling ...

Embodiment 1

[0067]The method of preparing the magnetic recording material according to the present embodiment, the steps are as follows:

[0068](1) According to the weight of the weight, 135 parts of the iron (Tangshan Iron and Steel Group), 15 parts of carbonate, 7 copies of bicarbonate, niomethorium oxide, 0.7 copies of niobium oxide, 1.2 parts of oxide, titanium oxide 1.2 parts 1.6 parts of cobalt oxide, 1.6 parts of zirconia, 1.6 parts of nickel oxide, 2 parts of nicodium oxide, mixed in a mine machine, after dense treatment of 60s, water, the ball is 200 μm;

[0069](2) Pre-war at 1020 ° C in 1020 ° C for 1 h at 1020 ° C, and then warmed to 1 h at 1180 ° C; after the end, the ball mill is first carried out to the average particle size 2.0μm;

[0070](3) Place the material obtained in step (2) is placed in the ball mill, and the fine mill is 1.5 μm;

[0071](4) The material obtained in step (3) was treated with 2 h at 980 ° C, and then dispersed using a high speed pulverizer to obtain the magnetic rec...

Embodiment 2

[0073]The present embodiment refers to the preparation method of Example 1. The difference is only that the raw material of the present embodiment is 135 parts of the iron red (Tangshan Iron and Steel Group), 18 parts of Barium carbonate, 8 copies of carbonate, manganese oxide 1.5 0.7 parts of niobium oxide, 1.2 parts of oxide, 1.2 parts of titanium oxide, 1.6 parts of cobalt oxide, 1.6 parts of zirconia, 1.6 parts of nickel oxide, and 2 trioxide.

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Abstract

The invention relates to the technical field of magnetic information materials, in particular to a low SFD magnetic recording material and a preparation method thereof. The low SFD magnetic recording material is mainly prepared from the following components in parts by weight: 100-200 parts of iron oxide, 10-20 parts of strontium salt, 5-10 parts of barium salt, and metals of VIIB group 1-2 parts of oxides, 0.5-1 parts of metal oxides of VB group, 0.5-2 parts of samarium oxide, 4-10 parts of additives and 1-3 parts of flux; the additives include oxides of titanium, cobalt One or more of oxides of zirconium, oxides of zirconium and oxides of nickel. In the present invention, by adding metal oxides of the VIIB group and VB group metals, using their special electronic arrangement, through alloying with iron, strontium and barium, the lattice constant is changed, thereby changing the magnetic recording material. Magnetic, promotes lower SFD value.

Description

Technical field[0001]The present invention relates to the field of magnetic information material, in particular, to a magnetic recording material having a low SFD and a preparation method thereof.Background technique[0002]With the rapid development of technology, magnetic recording materials have been widely used in electronic data storage. Magnetic recording materials have been applied in many fields, such as tickets, cards, ID cards, etc., using magnetic recording materials for identification information.[0003]As the magnetic recording material, the main requirements include high coercive force, suitable high saturated magnetization, high residual magnetic ratio, steep hysteresis, low magnetic temperature coefficients, and aging coefficients, and the like. High coercive force can improve the density and anti-interference resistance of storage information, and appropriate high saturation magnetization intensity can improve the output information intensity, high residual magnetic ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/65G11B5/84H01F1/11H01F41/00
CPCC04B35/2633C04B35/2641C04B35/265C04B35/62605C04B2235/3213C04B2235/3215C04B2235/3224C04B2235/3232C04B2235/3244C04B2235/3251C04B2235/3262C04B2235/3275C04B2235/3279C04B2235/3298H01F1/11H01F41/00
Inventor 刘荣明张威峰刘辉王倩贾立颖李炳山
Owner BGRIMM TECH CO LTD
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