How Strong Are Neodymium Magnets?
How Strong Are Neodymium Magnets?
Neodymium magnets are known for their incredible strength. But what exactly makes them so effective, and how can we utilize them in our daily lives?
Scientists conducted an experiment in order to discover this. Two neodymium magnets with opposite magnetic poles on either side were placed close together and some objects were then placed between them.
The strength of a neodymium magnet
Neodymium magnets are among the strongest permanent magnets available, boasting up to ten times stronger magnetic pull than other types. Neodymium is an alloy made of neodymium, iron, and boron; its magnetism has widespread applications ranging from hard drives to headphones and medical devices.
Strong neodymium magnets can be dangerous when misused improperly. Be wary when placing one near your body - whether at home or work. Be wary of its strength before placing near yourself.
Neodymium magnet strength can be measured in various ways. One way is to examine its coercivity; this is usually measured in Oersted units labeled Hc and indicates how difficult it would be for it to demagnetize. As its coercivity rises, de-magnetizing becomes harder.
Second, consider the remanence of your magnet. Remanence can be determined using its maximum energy product (BHmax). This value depends on both magnetic flux density and field strength.
Keep in mind that the remanence of a magnet does not correspond with its coercivity or magnetic strength, making it important to consider all three when selecting one for any given application.
An alternative way of measuring the strength of a neodymium magnetic is by looking at its open circuit or surface gauss value - this value indicates the maximum pull force the magnet can generate on any given surface area. Knowing this value when selecting a magnet helps you ensure you buy one appropriate to your application needs.
Neodymium magnets come in different grades, which is indicated by an N-rating. Each grade demonstrates different strengths for specific applications, so their N rating allows you to instantly determine which magnet would provide optimal strength in any given instance.
N-ratings are calculated based on residual induction, coercive force and maximum energy product - these are some of the most widely-used magnet rating systems.
N-ratings are commonly employed by manufacturers to describe the strengths of their products, though this method doesn't represent an universal system for classifying magnet strength. Each rare-earth magnetic material like Neodymium and AlNiCo has its own classification system which makes the N rating even less useful as an evaluation factor.
Each magnetic property is typically assigned an alphabetic rating to make comparing strengths of neodymium magnets from various manufacturers easier.
N35 and N42 neodymium magnets are both powerful magnets; however, the N42 magnet is best used in environments with temperatures no higher than 80C, while the N35 can withstand maximum operating temperatures up to 120C.
Neodymium magnets can also be distinguished based on the coating they feature; this may be ceramic, nickel or copper plating that protects them against corrosion and rusting.