Sinter NdFeB Magnet with high quality and low price
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- Loading Port:
- Guangzhou
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 pc
- Supply Capability:
- 10000000 pc/month
- Option:
- NdFeB ring NdFeB block NdFeB segment
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Item specifice
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:A student wants to map the magnetic field of a bar magnet. Which of the following materials will be most?
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- Q:The permeability of magnetic material is high or low?
- If it is to pay attention to permeability, then it should be soft magnetic material. In general this material can be divided into soft magnetic materials and magnetic materials. The difference between the two is the magnitude of the coercivity, which can be interpreted as the magnitude of the applied magnetic field which must be applied to the disappearance of the magnetic force.
- Q:When Fe heats up it changes its crystal structure from BCC to FCC at 910 degrees celsius and then back to BCC at 1390 degrees celsius then it turns into a liquid at 1536+ degrees celsius. At which of those crystal structures is it magnetic and why?
- The brake booster is bad. You will need to buy a reman unit. It should be about $75.00 to $150.00 and you won't need to bleed the brakes again either.
- Q:what happens, they oppose, repel, stick together?and why
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- Q:Which non magnetic material will prevent the magnetic flux to penitrate through it?
- The correct answer is a superconductor A superconductor is that non-magnetic substance that will prevent the magnetic flux to penetrate through it. Meissner and Ochsenfeld discovered that superconductors expelled applied magnetic fields What is a SUPERCONDUCTOR ??. .(MUST BE THINKING). Superconductivity is a phenomenon occurring in certain materials at extremely low temperatures, characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field (the Meissner effect). When a superconductor is placed in a weak external magnetic field , the field penetrates the superconductor for only a short distance λ, called the London penetration depth, after which it decays rapidly to zero. This is called the Meissner effect, and is a defining characteristic of superconductivity The Meissner effect is distinct from this because a superconductor expels all magnetic fields, not just those that are changing. Suppose we have a material in its normal state, containing a constant internal magnetic field
- Q:I sorta get that it redirects something, but what does it redirect and can you control where it redirects it to?
- It is fine as long as it isn't a 2 stroke with premix gas on a long downhill.
- Q:something i could use to surround a magnet
- Any object can insulate a magnets power. The thicker the object, the more it's blocked.
- Q:How do you see from the surface that you are galvanized or nickel plated?
- The process of baking and heating the equivalent magnetic materials at elevated temperatures, so high temperature will make the interaction domain between the direction of magnetization of magnetic domains weakened, can rotate freely, then the orientation of the situation has changed, become disorderly, also is the macro is not magnetic, the demagnetization.
- Q:I‘m working on a school project, and it involves electromagnets. The thing is that I want to find a way to block electromagnetic radiation so that the magnets won‘t cause damage to external devices like cellphones.
- I doubt that a cell phone would be damaged by an electromagnet, though there are a few things that would, like a compass or the pacemaker for my heart. To block electromagnetic waves, (ie: radio waves), a thin solid sheet of any conducting material, like iron, steel, copper, etc., will block those. For that matter, even fine copper screening will block radio waves if it's grounded. To block magnetic fields takes a little more. Use a sheet of any magnetic material, such as steel. (If a magnet sticks to it, it will block or greatly attenuate magnetic fields.) An especially good material is called Mu metal. It may not be available now. It used to be used to enclose picture tubes and other CRTs, (Cathode Ray Tubes), in TVs, oscilloscopes and other sensitive equipment. Whatever material you use, you would need to make a totally enclosing box to contain it. Good luck!
- Q:If it can‘t be blocked, what material would weaken the magnetic field the most. Lead, wood, plastic, etc. Thanks for any help.
- Yes. A nonmetallic cover of the appropriate thickness for the strength of any particular magnet can be used to prevent the magnetic pull on othe magnets or metallic objects.
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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
- Option:
- NdFeB ring NdFeB block NdFeB segment
OKorder Service Pledge
OKorder Financial Service
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