What Determines the Strength of a Magnet?

There are many different kinds of magnets. They come in different sizes, shapes, materials and strengths. They both generate a force called magnetism that allows them to attract or stick to certain metals. However, some magnets can't even hold a sheet of paper to the refrigerator, while others can lift heavy objects. So what determines the strength of a magnet?

1. The material type of the magnet

Every substance is made up of tiny units called atoms. Every atom has electrons. Electrons are constantly moving. Their movement creates an electric current that makes each electron act like small magnets. Most substances have the same number of electrons spinning in opposite directions, which cancels out their magnetism.

But some substances are very magnetic, which means most of their electrons spin in the same direction. These substances have high magnetic permeability and are the strongest magnets. Iron, cobalt, and nickel belong to these substances, and NdFeB rare earth neodymium cone magnet is the strongest magnet.

2. The external magnetic field of the magnet

To turn a substance into a magnet, it must be exposed to the magnetic field of an existing magnet. The stronger the external magnetic field applied, the stronger the resulting magnet.

3. Dimensions of magnets

Does bigger mean stronger? When you magnetize a piece of iron, the north poles of the atoms are aligned. The force created by the aligned atoms creates a magnetic field. A larger piece of iron will have more atoms to align, which may create a stronger magnetic field than a small piece of the same material. However, with extremely long pieces of iron, there is an increased risk of stray magnetic fields dislocating atoms and actually reducing the strength of the magnet's magnetic field.

4. How to choose the right magnet?

While not an important factor in determining magnet strength, size and shape are equally important, depending on the application. After years of industry knowledge accumulation and experience exploration, in 2013, meank company introduced metal parts production equipment (steel cup/iron shell lathes, punches), and started the processing and assembly of magnetic parts and magnetic parts. (Magnetic devices are also called magnets/magnetic assemblies, which are magnetic systems that apply the principle of magnetic circuits)

Today, the company has dozens of advanced magnet assembly related parts processing equipment, machining magnet assemblies, starting from traditional steel cup (can) magnets, expanding to rubber and plastic coated holding magnets, and mounting magnets powerful. The company has also trained a group of professional magnet assembly and testing personnel. The details of the magnets produced are well handled, and the pass rate is much higher than other manufacturers. Welcome to consult.

Related Article