Category Archives: Magnet Materials

How Strong is the Neodymium Magnet?

Magnet is one of the most common items in our daily life. It has a wide range of applications and can be used in industry, manufacturing, electronic products, etc. Magnets can be divided into two categories, namely permanent magnets and non-permanent magnets; permanent magnets can be natural magnetite or artificially made magnets. Among all permanent[…]

Why the surface gauss cannot represent the actual performance of a magnet?

What is surface Gauss? The surface Gauss refers to the magnetic induction intensity at a certain point on the surface of the magnet, it is measured by Gauss meter, the unit is Gauss (Gs) or Tesla T (1T=10000Gs, 1mT=10Gs). It is the most widely used measurement method due to its convenience. How to measure the[…]

Development history of permanent magnet materials

Development history of permanent magnet materials Japan’s T.mishima discovered the first generation of magnet materials It is mostly used in the instrument industry, magnetoelectric instruments, micro-motor relays, etc. Carbon steel, tungsten steel and chrome steel with low magnetic energy product are mainly used. At the end of the 19th century, people mainly used carbon steel,[…]

Corrosion Resistance of Permanent Magnets

Causes of magnet corrosion By their very nature, every permanent magnet contains some form of iron. Iron displays the most dramatic ferromagnetic properties of all elements, which is why it is found in the most powerful magnets. However, iron is highly reactive with water and then causes magnets with high iron content very susceptible to[…]

What is N55 magnet

N55 Magnet   1:N55 magnets are the strongest magnets available nowadays for commercial use. Neodymium rare earth magnets strength is measured on a scale of 24MGOe-55MGOe. These powerful magnets were developed quite recently. This new grade of neodymium magnets is 5-6 percent stronger in compare with the more common N52 magnet. Therefore, these magnets are[…]

How do permanent magnets lose their magnetism?

Why are permanent magnets magnetic? Microscopically, the negatively charged electrons are spinning themselves while constantly revolving around the nucleus. The rotation of electrons creates an attractive or repulsive force, which we call magnetism. In most elements, the electrons in the same orbit have opposite spin directions, and the magnetic moments cancel each other out, showing[…]

How to separate strong magnets?

There are mainly two types of widely used strong magnets– samarium cobalt magnets and neodymium magnets commercially available. If you’ve never handled them before, you will probably be surprised by how powerful these magnets can be. Their magnetic energy product density is more than ten times that of AlNiCo magnets or ferrite magnets. Samarium cobalt[…]

what is Halbeck array and Halbach magnet

Halbeck array   A Halbach Array is a magnet structure that is an engineering approximation of the ideal, with the goal of generating the strongest magnetic field with the least amount of magnets. In 1979, American scholar Klaus Halbach discovered this special permanent magnet structure while doing electron acceleration experiments, and gradually perfected this structure,[…]

Comparison and Substitutability of Samarium Cobalt Magnet and Neodymium Magnet

Magnetic Performance The magnetic performance of SmCo magnet is generally lower than that of Neodymium. The magnetic performance of a magnet is measured by its magnetic energy-(BH)max. The (BH)max of Sm2Co17 is about 28-33 MGOe, at the same time, the (BH)max of neodymium is around 33-52  MGOe. Temperature Resistance The working temperature of Neodymium magnet[…]

Difference among Surface Gauss, Remanence and Pull Strength

On this magnet industry, you will always see magnets listed with a maximum pull force, remanence and a Gauss rating. So what’s the difference among them? What is Gauss? Surface Gauss is a measure of magnetic induction and a value of density. Simply put, Gauss represents the number of magnetic field lines per square centimeter,[…]