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Process for preparing square deflecting magnetic core and material thereof

A magnetic core, fe2o3 technology, applied in the manufacture of magnetic deflection device, magnetism of inorganic materials, manufacture of inductor/transformer/magnet, etc. Problems such as unreasonable flux density distribution and electron beam power loss can achieve the effect of ensuring the original performance indicators, improving clarity and resolution, and reducing waste loss

Active Publication Date: 2004-11-17
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, circular deflection cores are generally used in TV receivers. As TVs develop towards flat screens, wide screens, and large screens, the original circular deflection cores cause power loss in electron beam deflection, and due to the magnetic flux area And the distribution of magnetic flux density is unreasonable, resulting in the sharpness and resolution of large cathode ray tubes can not meet the requirements

Method used

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Examples

Experimental program
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Embodiment Construction

[0019] The steps of the preparation method of square (PF) deflection magnetic core are:

[0020] 1) Fe 2 o 3 : 69 ~ 71.5% (weight percentage, the same below), ZnO: 13.0 ~ 15.5%, Mn 3 o 4 : 1.5~2.5%, MgO: 10.0~12.0% and additive CuO: 1.0~3.0%, Bi 2 o 3 : 0.05 ~ 0.2%... and other elements are strongly mixed and pre-fired. The pre-calcination temperature is 900-1100°C to make it undergo solid-state reaction, and 80-85% of the mixture will form a ferrite phase after pre-calcination;

[0021] 2) The above-mentioned pre-fired material is crushed and sand-milled into a slurry with a particle size of ≤Φ1.8 μm. Add appropriate amount of PVA binder and spray granulation, particle size range: Φ0.1~0.5mm, water content 0.2~0.5%, bulk density 1.4~1.5g / cm 3 powder;

[0022] 3) After mixing the above granules, they are directional pressed and formed on a fully automatic press and a special mold. The shrinkage rate of the mold is 15.5-17.5%. The shrinkage rate of each position of the ...

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PUM

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Abstract

The invention discloses a manufacturing method for a kind of square deflection magnetism core and the materials. 1) the Fe2O3, ZnO, Mn3O4, ...MgO, and additives CuO, Bi2O3 elements are blended, prebaked, and reacted with solid phase, the compound generates the ferrite phase after being prebaked; 2) the prebaked material are grinded into pulp with particle size less than phi1.8ª–m, then the additives are added in and carries on the atomization pelleting; 3) the particles are blended and pressed, formed in the automatic presser and special model; 4) uses the flat board or bake bearing base process to carry on oriented baking. The merits of the invention are: 1) it uses cheap materials ferric oxide, with current manufacturing device and special process, it decreases the cost greatly, the key technology parameter is upgraded; 2) PF design makes the magnetic flow area and the density distributed more reasonable, it upgrades the articulation and resolution of the screen; 3)( upgrades the deflection efficiency of negative transmitting pipe of the television receiver, reduces the idle work consumption of the electron beam deflection.

Description

technical field [0001] The invention relates to a preparation method and material of a square deflection magnetic core. Background technique [0002] At present, circular deflection cores are generally used in TV receivers. As TVs develop towards flat screens, wide screens, and large screens, the original circular deflection cores cause power loss in electron beam deflection, and due to the magnetic flux area And the magnetic flux density distribution is unreasonable, causing the definition and resolution of large cathode ray tubes to fail to meet the requirements. Contents of the invention [0003] The object of the present invention is to provide a preparation method and material of a square deflection magnetic core. [0004] The steps of the preparation method of the square deflection magnetic core are: [0005] 1) Fe 2 o 3 : 69-71.5% by weight, ZnO: 13.0-15.5%, Mn 3 o 4 : 1.5~2.5%, MgO: 10.0~12.0% and additive C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34H01F41/02H01J9/236
Inventor 何时金郭晓东张爱国吴昆裔何俊
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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