Magnetic material classification and production process of nano sand mill

In the production process of magnetic materials, a grinding, dispersion and stirring process is required, and a nano sand mill and a complete set of process equipment are required.

So let’s get to know what is a magnetic material.

Magnetism is a basic property of matter.

A material that can respond to a magnetic field in a certain way is called a magnetic material.

According to the magnetic strength of the material in the external magnetic field, it can be divided into diamagnetic material, paramagnetic material, ferromagnetic material, antiferromagnetic material and ferrimagnetic material.

Most materials are diamagnetic or paramagnetic, and they respond weakly to external magnetic fields. Ferromagnetic materials and ferrimagnetic materials are ferromagnetic materials. Generally speaking, magnetic materials refer to ferromagnetic materials. For magnetic materials, the magnetization curve and hysteresis loop are characteristic curves that reflect their basic magnetic properties. Ferromagnetic materials are generally Fe, Co, Ni elements and their alloys, rare earth elements and their alloys, and some Mn compounds. Magnetic materials are generally divided into soft magnetic materials and hard magnetic materials according to the degree of difficulty of their magnetization.

Magnetic materials are divided into metal and non-metallic materials according to their properties. The former mainly includes electrical steel, nickel-based alloys and rare earth alloys, while the latter is mainly ferrite materials. According to the use, it is divided into soft magnetic materials, permanent magnetic materials and functional magnetic materials. Functional magnetic materials mainly include magnetostrictive materials, magnetic recording materials, magnetoresistance materials, magnetic bubble materials, magneto-optical materials, gyromagnetic materials, and magnetic thin film materials. The magnetization curve and hysteresis loop reflect the basic magnetic properties of magnetic materials. And magnetic loss.

Permanent magnetic material is a material with wide hysteresis loop, high coercivity, high remanence, and can maintain constant magnetism once it is magnetized. Also known as hard magnetic materials. In practice, the permanent magnet material works in the second quadrant demagnetization part of the deep magnetic saturation and hysteresis loop after magnetization. Commonly used permanent magnet materials are divided into Al-Ni-Co-based permanent magnet alloys, Fe-Cr-Co-based permanent magnet alloys, permanent magnet ferrites, rare earth permanent magnet materials and composite permanent magnet materials.

Soft magnetic materials, magnetic materials with low coercivity and high permeability. Soft magnetic materials are easy to magnetize and demagnetize, and are widely used in electrical and electronic equipment. The most widely used soft magnetic materials are iron-silicon alloys (silicon steel sheets) and various soft ferrites.

Permanent magnet materials in terms of product application:
①The applications based on the principle of electromagnetic force mainly include: speakers, microphones, meters, buttons, motors, relays, sensors, switches, etc.
②Applications based on the principle of magnetoelectric action mainly include: magnetrons and traveling wave tubes and other microwave tubes, picture tubes, titanium pumps, microwave ferrite devices, magnetoresistive devices, Hall devices, etc.
③Applications based on the principle of magnetic force mainly include: magnetic bearings, concentrators, magnetic separators, magnetic suction cups, magnetic seals, magnetic blackboards, toys, signs, password locks, photocopiers, thermometers, etc. Other applications include: magnetic therapy, magnetized water, magnetic anesthesia, etc.

The application of soft magnetic materials:
Mainly used for magnetic antennas, inductors, transformers, magnetic heads, earphones, relays, vibrators, TV deflection yokes, cables, delay lines, sensors, microwave absorbing materials, electromagnets, accelerators, high-frequency acceleration cavities, magnetic field probes, magnetic substrates , Magnetic field shielding, high-frequency quenching energy accumulation, electromagnetic chuck, magnetic sensitive components (such as magnetocaloric materials as switches), etc.

In the process plan of the magnetic material production line, the core is the raw material grinding, dispersion and stirring process. Even the use of nano sand mills and complete sets of process equipment.


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