Sinter NdFeB Magnet with high quality and low price
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Specification
Rare earth Neodymium magnets (NdFeB) have been available for industrial application since 1984. Neo magnets have extremely high magnetic energy and therefore are used in applications which require high powered magnets, as well as applications where size and weight reduction are of interest or need to be considered. These qualities have made NdFeb magnets preferable over the commonly used larger and less powerful Ferrite magnets.
The main raw materials NdFeB permanent magnets are rare earth metal-Neodymium (Nd) 32%,metal element Iron (Fe) 64% and nonmetal element Boron(B) 1% , and some small amount added Dysprosium (Dy), Terbium(Tb), Cobalt (Co), Niobium(Nb),Gallium (Ga),Aluminum (Al),Copper (Cu) and other elements. Ternary system neodymium permanent materials are of Nd2Fe14B compound as a matrix, its compositions should be similar with the molecular formula of compound Nd2Fe14B, but, when it is proportioning according to the composition of Nd2Fe14B compound, the magnet performances are very low, and even without magnetic, just on the actual magnets, when the content of neodymium and boron are more than on Nd2Fe14B compound, we can get the better permanent magnet performances.
Neodymium magnets can be divided into three main groups:
1.Regular Neodymium
2.High corrosion resistant Neodymium
3.Bonded Neodymium (Isotropic): Manufactured by the injection of plastic material and Neodymium into a mold. This production method yields a very precise magnet which does not require further grinding and does not suffer substantial current loss.
Neo magnets are known for their high temperature resistance, making them durable and functional in temperatures exceeding 200°C. This quality makes them ideal for heavy industry applications. Sintered Neodymium, however, is sensitive to oxidization and can develop corrosion, so magnets are usually coated with Nickel+Copper+Nickel,Nickel+Sn, Zn(galvanization), Epoxy and Passivation for their protection.
Characteristics of Surface Treatment
Coating Performance
| Zn | Colour Zn Cr3+ | NiSn | NiCuNi | Epoxy | Passivation |
Colour | White | Multicolor | Silver | Silver | Black | Silver |
Thickness(μm) | 6-15 | 6-15 | 10-30 | 10-30 | 10-30 | 1-5 |
Pressure Cooker Test (120℃,2atm,100%RH) | >8hr | >8hr | >24hr | >24hr | >24hr | |
Salt Spray Test (35℃,5%NaCl,1.2atm) | >24hr | >72hr | >48hr | >48hr | >96hr |
- Q: What‘s the difference between an electric field and a magnetic field? Does electric current create magnetic fields? how can you figure this out? Can someone explain how it works? (please excuse my poor wording) can a magnet create an electric field. Connect the wire to the ammeter and use a bar magnet to try and create a current lt;-- this was a lab, but I didn‘t quite understand what was going on. which is why I can‘t really word any specific questions. I need a general overview (in 8th grade language!) of the basics of electricity and magnetism. Anything will probably help, but please explain it to me in your own words!
- Not literally, but a rational case can made for this and other parts of scripture banning magic.
- Q: plz explain
- In a magnetic material, the magnetic properties stem from the alignment of the electrostatically charged particles. As a substance is heated the molecules vibrate strongly and this disrupts the alignment.
- Q: what are the characteristics of a material having high coercive force?
- The coercive force which relates to the coercivity of a magnetic material ( i.e. ferromagnetic) is the reverse magnetic force in terms of the magnetic field strength H that will reduce the magnetic flux density B in the material to zero. A material with a high coercivity will have a broad hysteresis curve.
- Q: what is meant by this ‘cold roll grain orientation‘?
- I think it reduces hysteresis and maybe increases relative permeability. What gives a magnetic material the ability to concentrate a magnetic field is all the tiny, movable magnetic domains within the material lining up along with the applied field, and adding to it. Some of the domains can get stuck after the field is removed, causing hysteresis(residual magnetization). And the degree to which this happens depends on the mircostructure of the metal. Most metals, unless they're made specifically to be single crystal which is difficult and expensive, are made up of billions or microscopic pieces of pure crystal separated by impurities in the metal. These little crystals are called grains. And the impurities between grains, grain boundaries. The number of domains that are available to move(this is what determines a materials permeability) also depends somewhat on the microstructure of the metal. Atoms act differently at grain boundaries than they do within the grain. And the orientation of the crystal within the grain makes a difference as well. The way a metal is worked changes the grain structure, maybe from short fat grains to long thin grains, fore eample. And crystals with random orientations to more organized orientations.
- Q: How familiar with magnetics and magnetism are you?
- I used to be taught this system to kata when you consider that the mid eighty's. Callsign says some thing that's so principal within the know-how of kata bunkai(breakdown) and oyo(observe). Many men and women think that the program of kata system is meant to seem because it does within the kata. Nothing can also be additional from the reality. The kata is there to maintain you repeating the tactics, for the reason that a few of the tuidi can not be carried out complete drive towards your dojo brother. They are for use towards an attacker. We train them with our brothers till they grow to be a reflex, however kata maintains you coaching the program of fajing with the system. I'm comfortable to look that men and women like him are round, however he isn't the one one. There's a man, additionally from the UK who has a YT website online known as Practical Taekwondo. I disregard his identify. There is Vince Morris from the UK additionally. Here within the US there also are many that train this manner. One of the highest masters of martial arts used to be proper right here within the US. His identify used to be Seiyu Oyata. This guy is a real Okinawan Bushi and holds a prime situation within the historical past of Karate, up there with Chojun Miyagi and so forth. We misplaced him final 12 months. In Okinawa we now have Masters like Tetsuhiro Hokama, the Shinjo brothers, the Higa loved ones. Abernethy's strategies aren't new or modern-day. This is how karate used to be practiced earlier than it used to be announced to the west.
- Q: hi,Does a permanent magnet still have its magnetic properties outside the earths atmosphere (i think it will, but I would like to hear more). Does it still attract to other ferromagnetic materials.
- Yes it does. Magnetic fields are not effected by the air, unless the air is ionized. I have degrees in both physics and astronomy.
- Q: I know that magnets attract and repel magnetic materials, magnetic materials are affected by magnets. so when a magnet attracts an nail, the magnet is, well,the magnet, and the nail is the magnetic material. But I‘m confused about the term magnetism. When I looked it up on dictionary it said magnetism are the properties of attraction possessed by magnets But when I searched on pedia, the definition came out to be Magnetism is a property of materials that respond at an atomic or subatomic level to an applied magnetic field. so what creates magnetism? magnetic materials or magnets? and also I know that magnets create magnetic fields, but do magnetic materials also? I‘m also confused about the term magnetize, When you magnetize something do you make it into a magnet or a magnetic material?thanks a lot!
- Every atom of iron is a tiny magnet. Same with Cobalt, Nickel, and Neodyneum. NOT everything made of iron is a magnet, because the material cooled from molten with its magnetic domains all misaligned and scattered. Magnetized iron is cooled from molten in the background of a magnetic field from another magnet. The existing magnetic field aligns the magnetic domains, and causes the entire object to be a magnet. The fundamental cause of magnetism is the interaction of charged particles that are MOVING relative to one another. It is a manifestation of the same force (electromagnetism) as the electrostatic attraction and repulsion, but it isn't the same manifestation (it is a different branch of the same tree). Quantitative answers to what magnetism is caused by the moving charges charges is a topic for another day. Wait until you are in college physics.
- Q: how does an iron core in a solenoid strengthen the magnetic field of my electromagnet?
- German Shepherds have a lot of health problems from skin to joint problems. She may have arthritis, Hip Dysplasia or it could be from lime disease if she has a tick. I would tell your mother to inspect her for ticks. I suggest you have your mom or you call your emergency vet and see if they could come out and look at your dog. Remember she's getting old now.
- Q: Hey, im doing some experiments of my own about magnetism, and was wondering if the some of the magnetic materials are MORE magnetic than other? (has a greater attraction to magnets/are better magnet shields/better at redirecting magnetic fields)
- The strongest permanent magnet material we know of is Nd2Fe14B1 (or minor variations on this material). Prior to the discovery of NdFeB, the strongest was SmCo, prior to the discovery of that, the strongest was AlNiCo. The strongest magnetic fields are produced using electromagnets. As far as shielding or redirecting magnetic fields. A superconductor will prevent the penetration of a magnetic field. You can see an example of this if you google magnetic levitation, high temperature superconductor, and related terms.
- Q: In some part of a magnet wouldn‘t find particles with both positive and negative fields between both poles?
- The magnetic field is produced by negatively charged particles - electrons. Posively charged particles - protons - are not involved in the creation of a magnetic field of magnetized solids. When a charged particle moves in a certain way, it creates a magnetic field, and there are some materials in which this effect of the electrons can be aligned to give us magnetic materials. in a magnet, the alignment of the fields does not change in the magnet. As a very rough analogy, you could think of a series of water pumps, one pumping into the next, and the next and so forth. Water would enter at one end, and emerge at the other. So you could see one side of the pump system as 'negative' and the other side as 'positive'. But clearly, there would not be a point in the middle that was niether negative nor positive. Each pump would pump in exactly the same way. A magnet is very rougly like that. Each group of molecules, called a domain, is magnetized in a certain direction, and when many domains are in the same direction, you have a magnet.
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Sinter NdFeB Magnet with high quality and low price
- Ref Price:
-
- Loading Port:
- Guangzhou
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 pc
- Supply Capability:
- 10000000 pc/month
OKorder Service Pledge
OKorder Financial Service
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