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How to consider the specifications and types of magnets

When choosing NdFeB magnets, customers should choose the magnet trademark suitable for them according to their working temperature. If the working temperature is higher than the...

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What is the strongest magnetic magnet?

What is sintered neodymium iron boron magnet?Sintered neodymium iron boron magnets are the most commonly used type of permanent magnet material. It is made of alloys of neodymium, iron, and boron, forming a Nd2Fe14B tetragonal crystal structure. Meanwhile, according to its raw material composition, it is a rare earth magnet.How is sintered neodymium iron boron magnet made?Customized sintered neodymium iron boron magnets are a complex process that includes the preparation, melting, grinding, pressing, sintering, machining, electroplating, magnetization, inspection, and packaging of formula powders.Preparing the formula magnetic powder is the most important process. Because technicians can add additional rare earth elements to adjust magnetic properties, such as cobalt (Co) for high temperatures and dysprosium (Dy) for better intrinsic coercivity.Why is sintered neodymium iron boron permanent magnet so sturdy?Melted alloy ingots are made into powder using powder metallurgy technology, wh

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How are sintered neodymium iron boron magnets classified?

Do you know that sintered neodymium iron boron magnets are evaluated based on the maximum magnetic energy product. Take a look at our neodymium magnet specifications page and you will find a rule that the maximum value of grade N35 (BH) is 33-36MGOe in the middle. Therefore, higher values indicate stronger magnets, ranging from N35 to N55.The letter after the number represents the maximum operating temperature (usually in Celsius), ranging from M (100 ℃), H (120 ℃), SH (150 ℃), UH (180 ℃), EH200 ℃) to AH (220 ℃). If there is no letter like N42 after it, the maximum operating temperature is 80 ℃.What coatings do neodymium iron boron magnets have?Due to the presence of iron element in sintered neodymium iron boron magnets, the coating is a very important part of neodymium magnets. Although we can offer multiple electroplating options, nickel is still the most common and usually the preferred.Nickel plated magnets actually consist of three layers of nickel plating, copper plating, and nic

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The direction of geomagnetism

The direction of geomagnetism is not fixed. About 780000 years ago, the Earth's magnetic field underwent a reversal, and then pushed forward, similar events occurred. However, the specific reason for the geomagnetic reversal is unknown so far. It is only known that this cycle will occur between 100000 and 50 million years. People still know very little about the structure of the Earth's interior, which can be said to be easy for heaven to enter but difficult for earth, To gain a deeper understanding of the Earth underground, drilling wells and tunnels is possible. However, currently the deepest drilling is only about 10 kilometers, and it is still far from reaching a depth of 2900 kilometers in the Earth's core.The former Soviet Union once dug holes into the center of the earth, and stopped at a depth of 13000 meters. The reason is unknown. It is generally believed that the deeper the depth, the harder it is. In addition, the deeper the depth, the higher the temperature. Th

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Why do magnets have suction

Magnet is a common thing. The compass, one of China's the Four Great Inventions, is made of magnets. Everyone knows that magnets are attractive to iron. Why? Where does its energy come from? Starting from the microscopic world, as we all know, any substance in the world is composed of molecules, which in turn are composed of atoms. Atoms are composed of nuclei and electrons outside the nucleus, with nuclei positively charged and electrons outside the nucleus negatively charged. Electrons outside the nucleus move around the nucleus, creating a magnetic moment. Therefore, a single atom is magnetic. Therefore, everything is magnetic, but the atomic arrangement of general matter is disorderly, Magnetism cancels out each other, so its external appearance lacks magnetism.From the above description, we can know that individual atoms also have magnetism. When the magnetic moments are arranged in an orderly manner, all the magnetic fields inside the atoms overlap with each other, and the ob

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The magnetism of the Earth

The Earth itself can generate a huge magnetic field, shielding life on Earth from cosmic rays and allowing the compass to function. On the other hand, the core of the Earth is mainly composed of iron, with temperatures as high as 5500 degrees Celsius, much higher than the Curie temperature of iron. So, why wouldn't the Earth lose its magnetism?The reason is that the geomagnetic field is not formed by a large magnet. The Earth's core is divided into a molten outer core and a solid inner core, because the pressure of the inner core is much higher than that of the outer core, so although the temperature of the inner core is higher, it does not melt.Due to the unique structure of the Earth's core, when the Earth rotates, there is a differential rotation between the inner and outer cores. In the outer core, convective iron forms a magnetic field through electromagnetic induction. Therefore, the geomagnetic field can remain in existence under high temperature conditions.

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What is sintered neodymium iron boron magnet?

Sintered neodymium iron boron magnets are the most commonly used type of permanent magnet material. It is made of alloys of neodymium, iron, and boron, forming a Nd2Fe14B tetragonal crystal structure. Meanwhile, according to its raw material composition, it is a rare earth magnet.Customized sintered neodymium iron boron magnets are a complex process that includes the preparation, melting, grinding, pressing, sintering, machining, electroplating, magnetization, inspection, and packaging of formula powders.Preparing the formula magnetic powder is the most important process. Because technicians can add additional rare earth elements to adjust magnetic properties, such as cobalt (Co) for high temperatures and dysprosium (Dy) for better intrinsic coercivity.

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