When I was new to this industry, I have confusions between magnetic flux density, magnetic flux and residual flux density. So, what's the meaning and difference between them?Magnetic Flux Density: lines of flux per unit area, usually measured in Gauss (CGS). One line of flux per square centimeter is one Maxwell. Gaussmeter Surface magnetic ...

We all know that the four parameters Br/Hcb/Hcj/Bhmax are the main parameters of magnet material performance. The engineer of magnet application design selects the appropriate magnetic material according to the electromagnetic conversion corresponding to these parameters. After the magnet is prepar...

What is Heat Treatment Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing techniques, heat treatment generally does not change the shape ...

High temperature SmCo magnets that can withstand temperatures of 500°C and 550 °C Many key devices in the aerospace and other fields, such as aircraft motors and generators, microwave functio...

“Split” is probably a more common word than “divided” in this context. If an atom has a net angular momentum (due to spin and orbital angular momenta of its constituent particles) then it also has a net magnetic dipole moment. The energies corresponding to the different possible quantized orientations of this magnetic moment in the magnetic field are seen as small increases or decreases in the tra...

All materials have tiny internal magnetic fields called domains, but in these three ferromagnetic metals, the internal magnetic domains are uniformly aligned to give them a magnetic field. In all other elements, the internal magnets are either randomly oriented or cancel each other out, which is why these ...

It depends on a bunch of factors like the type of magnetic material, the temperature, and whether it's stored with a "keeper" of easily magnetizable material that creates a magnetic circuit. A bar magnet out in the open tends to be in a metastable state. Magnetic field lines go in circles, but they don't "like" to go through air and and other non-magnetic materials, so this creates Magnetic reluct...

Let's see the picture below. The field on the other side of the plate is almost nil. This is because the plate has diverted the field, causing a lot of it to flow within the plate itself instead of in the air. This is sometimes used to help shield a speaker from your TV set. Placing the speaker in a box lined with sheet steel prevents the speaker magnet from messing with the colors on your TV s...

Some important properties used to compare permanent magnets are: remanence (Br), which measures the strength of the magnetic field; coercivity (Hci), the material's resistance to becoming demagnetized; energy product (BHmax), the density of magnetic energy; and Curie temperature (Tc), the temperature at which the material loses its magnetism. Rare earth magnets have higher remanence, much higher c...

You can strengthen magnets by placing them inwater, stacking them on top of each other or recharging them. The method of making amagnet stronger depends on the type of magnet you have. To strengthen an iron bar magnet, fill a bowl or panwith water. Find a small item to float in the water and place the magnet on topof the item. The magnet starts to twirl in the water until it rests and pointsdirect...

Magnetic field strengthis one of two ways that the intensity of a magnetic field can be expressed.Technically, a distinction is made between magnetic field strength H, measured in amperes per meter (A/m), and magnetic flux density B, measured in Newton-meters per ampere (Nm/A), also called teslas (T).The magnetic field can be visualized as magnetic field lines. The field strength corresponds to th...

In most applications, the answer is simply "no". If the magnets will be exposed to higher temperatures while in repelling applications, the answer is "possibly". The exact answer isa bit too complicated for a FAQ answer. We'd like to hear from your detailed question.

Very little. Neodymium magnets are thestrongest and most permanent magnets known to man. If they are not overheated or physically damaged, neodymium magnets will lose less than 1% of their strength over 10 years - not enough for you to notice unless you have very sensitive measuring equipment. They won't even lose their strength if they are held in repelling or attracting positions with other magn...

Yes. Neodymium-Iron-Boron magnets are sensitive to heat. If a magnet heated above its maximum operating temperature (176°F (80°C) for standard N grades) the magnet will permanently lose a fraction of its magnetic strength.If they are heated above their Curie temperature (590°F (310°C) for standard N grades), they will lose all of their magnetic properties. Different grades of neodymium different ...

The maximum operating temperature is themaximum temperature the magnet may be continuously subjected to with no significant loss of magnetic strength. This is 176ºF (80ºC) for standard gradesof neodymium magnets. The Curie Temperature is the temperature at which themagnet will become completely demagnetized. This is 590ºF (310ºC) for standardgrades of neodymium magnets. Higher temperature grades h...

1) The easiest way is to use another magnet that is already marked. The North pole of the marked magnet will be attracted to the South pole of the unmarked magnet.2) If you take an even number of magnets and pinch a string in the middle of the stack and dangle the magnets so they can freely rotate on the string, the North pole of the magnets will eventually settle pointing North. This actually c...