1, what is the magnetization (
Most of the magnetic material can be along the same direction of magnetization to saturation, the direction is called the 'magnetization direction' (
No orientation in the direction of the magnet (
Also known as isotropic magnet)
Than the orientation of the magnet (
Also called anisotropic magnets)
Magnetic to weaker.
2, what is the standard of 'poles' industry definition?
'North Pole' is defined as the magnet at a random rotation after its North Pole pointing to the earth's North Pole.
Also, the magnet South Pole pointing in the direction of the earth's South Pole.
3, in the absence of how to identify the magnet the North Pole?
It is clear that the only by eyes are unable to distinguish.
Can use the compass to the magnet, the pointer to the earth's North Pole will point to magnetic South Pole.
4, how to safe handling and storage of the magnet?
Should always be careful, because the magnet will be their adsorption together, may be task of fingers.
When magnet mutual adsorption are also likely to be damaged due to collision magnet itself (
Break out the edges or hit the cracks)
, large size of the magnet, each piece should be added between the plastic or cardboard gasket in place to ensure that can easily separate magnet.
Should be stored in a dry, constant temperature environment.
Note: the items will be magnetized magnet is far from easy, such as floppy disks, credit CARDS, computer monitors, watches, mobile phones, medical equipment, such as cardiac pacemaker.
5, how to do magnetic isolation?
Only can adsorption to the magnet material can have the effect of magnetic field partition, and the more thick material, the effect of the magnetic separation, the better.
6, what is the most powerful magnet?
Currently the highest performance of the magnet is rare earth magnets, and in the rare earth magnet ndfeb is the most powerful magnet.
But in more than 200 degrees Celsius environment, samarium cobalt is one of the most powerful magnet.
7, the types of magnets have?
Magnet, should call magnetic steel, all in English, magnetic steel is mainly divided into two categories, one kind is soft magnetic, one kind is hard magnetic;
Soft magnetic include silicon steel sheet and soft magnetic iron core;
Hard magnetic including aluminum nickel and cobalt, provide ndfeb, samarium cobalt, ferrite, and among them, the most expensive is the samarium cobalt magnet steel, ferrite magnets, is the cheapest of the highest performance ndfeb magnets, but performance is the most stable, the temperature coefficient is one of the best alnico magnets, the user can choose according to different requirements of different hard magnetic products.
8, how to define the performance of the magnet?
Mainly has the following three performance parameters to determine the performance of the magnet: A, remanence Br: permanent magnets by the saturation magnetization to technology, and remove the external magnetic field, the retention of Br is called residual magnetic induction intensity.
B, coercive force Hc: make the saturation magnetization to technology of permanent magnet B down to zero, need to add the reverse magnetic field intensity is called magnetic coercive force, referred to as coercive force.
C, magnetic energy product BH: represents the magnet in the air gap space (
Two pole magnet space)
The magnetic energy density, air gap the magnetostatic energy per unit volume.
Due to the product of the energy is equal to the magnet Bm and Hm, so called magnetic energy product.
9, what is the surface magnetic field?
The surface magnetic field refers to a specific location on the surface of the permanent magnet magnetic induction intensity is 10, how to choose the magnet?
Should be clear before decided to choose which kind of magnet need magnets play what role?
Major role: moving object, fixed object or lift.
The shape of magnet required: wafer form, circular, square shape, tile shape or special shape.
Required for the size of the magnet: long, wide, high, diameter and tolerance, and so on.
Suction of the magnet, the expected price and quantity and so on.