Magnetic powder particle surface all-dimensional film-attaching anti-oxidation method

Abstract

The invention discloses a magnetic powder particle surface all-dimensional film attaching anti-oxidation method. The invention belongs to the field of magnetic powder particle oxidation resistance. According to the invention, the interior of an circumferential bottom film atomization disc can be filled with a atomization evaporation solution; therefore, the magnetic powder is atomized at the bottoms of the bottom magnetic powder particles; an atomized solution sequentially penetrates through gaps among the bubble chain plates and the homogenizing soft layer from bottom to top to be in direct contact with the bottoms of the magnetic powder particles to form an anti-oxidation layer at the bottom; part of the atomized solution can generate a certain impact effect on the bubble chain plates; the bubble chain plates and the homogenizing soft layer generate a certain fluctuating effect; further, the magnetic powder particles at the upper part can move and turn over to a certain extent, so contact parts of the magnetic powder and the homogenizing soft layer are not always in the same position; and meanwhile, the anti-oxidation layer is formed on the upper surface of the magnetic powder incooperation with the prior art, so that the effect that the magnetic powder can generate the anti-oxidation layer in an omnibearing mode can be achieved, the oxidation resistance of the magnetic powder is effectively improved, and the service life of the magnetic powder is effectively prolonged.

Description

technical field [0001] The invention relates to the field of anti-oxidation of magnetic powder particles, and more specifically relates to an anti-oxidation method for all-round coating on the surface of magnetic powder particles. Background technique [0002] A hard magnetic monodomain particle. It is made into a magnetic slurry with adhesives, solvents, etc., and coated on the surface of a plastic or metal substrate (support), it can be made into magnetic recording materials such as magnetic tapes, magnetic disks, and magnetic cards. Magnetic powder is the core component of magnetic coatings and the main factor determining the magnetic properties of magnetic recording media. Magnetic powder has a great influence on the properties of magnetic recording materials. Therefore, there are certain requirements for magnetic powder: ①It is larger than the saturation magnetization σs and coercive force Hc; ②The particles are fine and needle-shaped and uniform; ③It has high dispers...

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Problems solved by technology

[0004] However, when the above-mentioned patent realizes the formation of an anti-oxidation film on the surface of the magnetic powder, since the magnetic powder is laid on the conveyor belt, the lower surface of the magnetic powder is in contact with the surface of the conveyor belt and cannot be in contact with the atomized solution. As a result, the anti-oxidation film formed on the surface of the magnetic powder in the later stage is only attached to the magnetic powder. The upper surface of the magnetic powder, that is, the anti-oxidation film cannot completely cover the magnetic powder, which leads to certain defects in the oxidation resistance of the magnetic powder, and even reduces the use effect and service life of the magnetic powder.

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