The National High Magnetic Field Laboratory (National MagLab) reclaimed the title of "world's strongest resistive magnet" this August with Project 11, which has an induction of 41.4 Tesla. Now they can boast of the most powerful superconducting magnet on the planet!
The most powerful magnet
The new superconducting magnet, created in the MagLab Tallahassee facility, generates a magnetic field of 32 T (which is almost 33% more than the previous model), for which it received the nickname 32T. In comparison, this magnet is 3,000 times more powerful than the ones we often decorate refrigerators with. The world record, set last week, represents one of the biggest advances in magnetic technology in the past 40 years, according to MagLab.
Greg Bobinger, director of MagLab, stressed in a press release that the 32T is "a true revolution in the manufacturing process" and noted that this technology will not only allow experiments in the laboratory, but will also significantly increase the power of other scientific devices around the world. - ranging from X-ray installations and ending with neutron emitters.
Superconductors play a big role in modern industry: they are used everywhere, from MRI scanners to nuclear fusion reactors and colliders. Therefore, researchers expect that in the near future the new supermagnet will make it possible to qualitatively advance in the study of several areas of science at once - physics, chemistry, biology, and even in the study of quantum matter. To facilitate its use, MagLab is already allowing scientists around the world to apply for the opportunity to work with the novelty.
The Future of Magnetic Technology
Of course, the team is not going to stop there. One day, a superconducting magnet could be as powerful as the lab's record-breaking resistive magnet, although MagLab engineer Hub Wiers, who oversaw the magnet's design, foresees the technology going even further.
"We've opened up a huge new area for experimentation," Weyers says in a press release. “I don’t know what its limit is, but it clearly exceeds 100 Tl. The required materials exist. Between us and a capacity of 100 T now there are only dollars and time to develop the necessary technologies.”
in the rubricMagnetic force is the most important property of a magnet. It is from this indicator that its performance and scope depend. The strength of magnets is measured in units of tesla (T). That is, to find out which magnet is the most powerful, you need to compare different materials according to this indicator.
The most powerful electromagnet
Scientists in different countries are trying to create the most powerful magnet in the world and sometimes achieve very interesting results. To date, the status of the strongest electromagnet is held by the installation at the Los Alamos National Laboratory (USA). A giant device of seven sets of coils with a total mass of 8.2 tons generates a magnetic field with a power of 100 Tesla. This impressive figure is 2 million times the strength of the magnetic field of our planet.
It is worth noting that the solenoid of the record holder magnet is made from a Russian copper-niobium nanocomposite. This material was developed by scientists of the Kurchatov Institute with the assistance of the All-Russian Research Institute of Inorganic Materials. A. A. Bochvara. Without this heavy-duty composite, the new most powerful magnet in the world would not have been able to surpass the record of its predecessor, since the main technical difficulty in operating installations of this level is maintaining integrity when exposed to the strongest magnetic impulses. The maximum recorded strength of the electromagnet field, which was destroyed by impulses during the experiment, was 730 T. In the USSR, scientists, using a magnet of a special design and explosives, managed to create an impulse of 2800 T.
copper-niobium
The magnetic pulses obtained in laboratories are millions of times greater than the Earth's magnetic field. But even the most powerful magnet that has been built to date is millions of times weaker than neutron stars. Magnetar SGR 1806-20 has a magnetic field of 100 billion Tesla.
Strongest home magnet
Of course, the magnetic strength of stars and the experiments of scientists are interesting, but most users want to know which magnet is the most powerful for solving specific applied problems. To do this, you need to compare the strength of the magnetic field of various types of magnets:
1) Ferrite magnets– 0.1..0.2 T
2) Alnico and samarium magnets– 0.4..0.5 T.
3) Neodymium magnets– up to 2 T (when added to the Habalt structure).
So, the most powerful magnet is rare earth super magnet, small powerful magnet, the main components of which are neodymium, iron and boron. The strength of its field is comparable to the power of electromagnets with a ferrite core. Neodymium-based magnetic alloy boasts unsurpassed performance in such important parameters:
1) Coercive force. This property allows the material to be used in the area of external magnetic fields.
2) Breakaway force. Thanks to the maximum magnetic force, it is possible to reduce the size of the products while maintaining a high adhesive power.
3) Residual magnetic induction. A high rate of residual magnetization provides a very important property of a neodymium magnet - the duration of the preservation of magnetic qualities. In essence, losing only a few percent of its strength over a century, the neodymium-iron-boron magnetic alloy is a perpetual magnet.
In order to maintain the strong magnetic field of the neodymium-based rare earth supermagnet, one should be aware of its weak spots. In particular, the material has a powder structure, so strong impacts and falls can lead to loss of its properties. Also, the alloy demagnetizes when heated to +70 ⁰ C (heat-resistant versions of the alloys can withstand up to +200 ⁰ C). Just consider these features and then the products will benefit you as long as possible.
It is from this indicator that its performance and scope depend. The strength of magnets is measured in units of tesla (T). That is, to find out which magnet is the most powerful, you need to compare different materials according to this indicator.
The most powerful electromagnet
Scientists in different countries are trying to create the most powerful magnet in the world and sometimes achieve very interesting results. To date, the status of the strongest electromagnet is held by the installation at the Los Alamos National Laboratory (USA). A giant device of seven sets of coils with a total mass of 8.2 tons generates a magnetic field with a power of 100 Tesla. This impressive figure is 2 million times the strength of the magnetic field of our planet. It is worth noting that the solenoid of the record holder magnet is made from a Russian copper-niobium nanocomposite. This material was developed by scientists of the Kurchatov Institute with the assistance of the All-Russian Research Institute of Inorganic Materials. A. A. Bochvara. Without this heavy-duty composite, the new most powerful magnet in the world would not have been able to surpass the record of its predecessor, since the main technical difficulty in operating installations of this level is maintaining integrity when exposed to the strongest magnetic impulses. The maximum recorded strength of the electromagnet field, which was destroyed by impulses during the experiment, was 730 T. In the USSR, scientists, using a magnet of a special design and explosives, managed to create an impulse of 2800 T.The magnetic pulses obtained in laboratories are millions of times greater than the Earth's magnetic field. But even the most powerful magnet that has been built to date is millions of times weaker than neutron stars. Magnetar SGR 1806-20 has a magnetic field of 100 billion Tesla.
Strongest home magnet
Of course, the magnetic strength of stars and the experiments of scientists are interesting, but most users want to know which magnet is the most powerful for solving specific applied problems. To do this, you need to compare the strength of the magnetic field of various types of magnets:
1) Ferrite magnets– 0.1..0.2 T
So the strongest magnet is rare earth super magnet, the main components of which are neodymium, iron and boron. The strength of its field is comparable to the power of electromagnets with a ferrite core. Neodymium-based magnetic alloy boasts unsurpassed performance in such important parameters:
In order to maintain the strong magnetic field of the neodymium-based rare earth supermagnet, one should be aware of its weak spots. In particular, the material has a powder structure, so strong impacts and falls can lead to loss of its properties. Also, the alloy demagnetizes when heated to +70 ⁰ C (heat-resistant versions of the alloys can withstand up to +200 ⁰ C). Just consider these features and then the products will benefit you as long as possible.
By the way, orderNeodymium magnets of various shapes and sizes at the best cost you can in the World of Magnets online store.
This is the most popular size. But when I bought it, I did not yet know that these magnets differ from each other not only in shape and size. The most important thing to pay attention to when buying them is the letters and numbers in the name. I bought a magnet marked N35, where N means that this magnet is used up to a temperature of 80 ° C, and if it is higher, it will demagnetize. The number 35 indicates its magnetic energy. Simply put, the higher the number, the stronger the magnet. But at the time of ordering, I did not know this yet, otherwise I would not have bought it. 
The seller is very sociable, responds quickly. I ordered a magnet in May 2017. for 1040 rubles.
The delivery was long, but there are no complaints against the seller. This type of product is not allowed to be delivered by air. The store has the ability to deliver goods from Russia, which significantly speeds up the time, but at the time of my order, it was possible to deliver goods only from China. The transport company that delivers in Russia is CDEK. 
The magnet is packed in a large foam box, inside with it, a gift from the seller - a coin of 1 yuan. A trifle, but nice.
For those who want to order, I recommend delivery from Russia, periodically this option appears. It arrived the next day after I ordered. Delivery would be faster.
I decided not to stand aside and test the magnet on my energy meters (electricity, gas, water). The magnet turned out to be rather weak for the water Valtek - it didn’t stop and didn’t even slow down, for the gas G4 the same way. It showed itself well on the Mercury 201 electric meter, stopped it completely. But, of course, I don’t advise anyone to do such actions, especially since if the magnet is very strong, it can simply break the counter, stopping it forever. 
I read a lot on the Internet about using magnets to magnetize water, but this requires a second one. Also, such strong magnets can be very widely used in the household. They are fun to play with, but be careful, especially with the two big magnets. Possible injury! Do not give to small children, it is very easy to pinch your fingers. Neodymium magnets, although they have a strong attraction, are very fragile; upon impact or fall, they can break and lose their magnetic properties.
According to the declared dimensions, the seller indicated a deviation of 1 mm. In fact: 49 mm and 28 mm. 
Magnet without visible damage, in excellent condition.
When asked what strength (kg) of the magnet, the seller did not answer. He wrote that they did not conduct such tests. I think he knows everything, but does not say, because. it is much smaller. 
I do not recommend this magnet. Consider options with the designation N52 or from 110 kg. 
After my order, the seller got more powerful magnets 55mm * 25mm N52. If a little earlier, I would have ordered it, but that's a completely different story ...
Neodymium magnets are divided into two types: magnetoplasts and sintered magnets. These magnets are produced by powder metallurgy technology and have strong magnetic properties, but they are fragile and quite expensive to manufacture. Magnetoplastics use a polymer filler to hold the magnetic alloy particles, however, they have less strong properties, but they are easy to process, ductile and cheap to manufacture.
If necessary, Fe-Nd-B magnets are coated with various materials to protect against adverse environmental conditions. These can be zinc and nickel-nickel-copper coatings, sometimes supplemented with an epoxy resin on the outer layer, a special resistant polymer material or treated with phosphates.
Powerful neodymium magnets belong to the third generation of rare earth magnets. They have the highest values of coercive force, residual magnetic induction, as well as maximum energy and the best price / performance ratio. Iron-neodymium-boron magnets are widely used in aviation, metrology, electronics, medical instruments and other modern fields of human activity. They are especially good at designing compact, lightweight and high performance devices.
It is correct to call it a neodymium-rare-earth magnet, since it contains the rare-earth metal Nd (neodymium), thanks to which the alloy with its use receives such a crystalline structure that has its own unique properties. Even at small sizes they are very powerful, weakly subject to temporary demagnetization. In addition to neodymium, these magnets contain boron (B) and iron (Fe).
Neodymium powerful magnet can be used as a universal fixture for furniture, souvenirs, curtains. Neodymium magnets are used both in complex electronics and as toys (known as neocubes), as well as search and lifting elements. What else can such a powerful magnet be useful for? The population has mastered it in a very interesting way. It turns out that a lot can be done due to such power. Therefore, more and more people want to buy a neodymium magnet and use it in electricity and water metering installations. For these purposes, the most powerful, but not the largest neodymium magnets available on the market are selected. Why pay more when the issue is solved at a lower cost.
In order for rare earth permanent magnets to serve for a long time, they are produced with special protection: it is either a zinc coating or nickel. Most often, a nickel coating is used for decorative purposes, however, if the magnet is to be used at a temperature of + 100 ° C and above, or in an aggressive environment, then it is better to purchase a magnet coated with zinc.
It is believed that a permanent magnet is not hazardous to health , and some assure that it is even useful, but there is no conclusive evidence for this yet. However, it should be borne in mind that using powerful neodymium magnets should be done with extreme caution for people who use a pacemaker, and if you are all of these people, then you should consult a doctor before you still decide powerful magnet buy and take it with you
Neodymium magnets can be of various shapes. The most common: ring, block (parallelepiped), disk. The strength of a permanent magnet depends on two criteria: the size of the magnet and the amount of neodymium in the iron-neodymium-boron composition. The larger the magnet, the stronger it will be. The more neodymium in its composition, the more pronounced its properties will be. Such a statement is true only in a narrow range, after which the properties will stop increasing, but the price will continue to grow.
According to the accepted standard, the size of the magnet is usually indicated in millimeters. As noted earlier, the larger the size, the more powerful it is. Often this force is referred to as the “hold or grip value”. This means that this is the force that must be applied to disconnect the magnets from each other. Simplified, it is measured in kilograms. Rare earth constants powerful neodymium magnets No wonder they got such a sonorous name. So, for example, the calculated adhesion force of a small disc-shaped neodymium magnet with parameters 10 * 5 mm (5 mm - thickness, 10 mm - diameter) will be equal to about two kg. It should be noted that this value is arbitrary, as it may differ depending on external conditions.
How are powerful neodymium magnets made?
In simple terms, let's say this: they are made by sintering powder metals, B Pieces of blanks are turned into a powder form, given the desired size and geometric shape, and then sintered in a vacuum furnace and subjected to magnetization.
What are the properties of neodymium magnets?
Resistant to demagnetization;
Characterized by a high cost-to-power ratio;
They have relatively low resistance to corrosion;
Magnets can be completely different shapes and sizes;
When used at high temperatures, these magnets are unsuitable.
What affects the properties and strength of magnets?
The presence of strong electric currents near the magnet;
The presence of other magnets nearby;
Temperature above 80°C;
High humidity conditions.
What determines the power of magnetization?
This parameter is directly determined by the original alloy, or rather the purity and ratio of the original elements. For simplicity, the finished product is designated by a code. The higher this code, the stronger the magnet and the higher the magnetization. The code indicates the quality of the material used in production. Knowing this parameter, two points can be noted:
How much "energy" is in this magnet;
The maximum temperature at which a powerful magnet can be used.
Storage and use of powerful neodymium magnets
These magnets should only be used in dry rooms. In addition, damage to the protective outer layer should not be allowed, because without this layer the magnet can quickly oxidize and fall apart. When you need it, you should know what the “peel strength” of the magnet depends on, so as not to make a mistake with the choice.
First, the force depends on the distance at which the object and the magnet are located. As the distance increases, the traction force decreases sharply. Even if there is an air gap of only half a millimeter between the magnet and the object, the adhesion will be halved. Also, the decrease in this parameter can be affected by the presence of a thin layer of paint on the object.
Secondly, it is the material from which the object is made. Clean, soft iron works best.
Condition No. 3 - a smooth surface of a metal object. If roughness is present on the surface, the adhesion force will be greatly reduced.
The fourth condition is the direction of the applied effort. The greatest amount of adhesion is achieved when the object and the magnet are perpendicular to each other.
And the last requirement is the thickness of the object itself. At the point of contact, it should not be too thin, because a separate part of the magnetic field may remain unused.
Where to buy a powerful magnet in Moscow?
Though so far buy a powerful magnet quite expensive, the scope of powerful neodymium magnets is quite wide. They can be used in the production of clothing, bags, packaging materials. In furniture production, these magnets are also widely used. They can be used as "refrigerator magnets" or other low-power holders. Search magnets are used by treasure hunters to search for various valuable metal items. Neodymium magnets are great for detecting iron and steel objects in soil, sand, walls and floors. For fun, roll the magnetic ball across the floor and it will pick up all the screws and nails in no time. In addition, a magnet put on a thread will become a convenient device for searching for metal objects in walls, under the floor and other places of the cache. The truth resembles a compass only with more powerful potential. About unusual and very practical neodymium magnets were written earlier.
Of course, all of the above is child's play compared to the potential of such material. Engines, generators, scientific instruments, magnetic resonance tomographs, and so on and so forth.
So, where to buy a powerful neodymium magnet? Not on the market or advertised. There can slip a frank fake. Best of all in a reputable online store that specializes in the sale of magnets and can carry out a quality check of the goods sold. Find a trusted place with a decent work phone and tech-savvy staff. So you need to buy a powerful magnet, especially if its price compares favorably with others. We meant our site, where everyone is able to purchase permanent neodymium magnets if the purchase amount meets the accepted conditions.
