do neodymium magnets lose strength?
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Very little. Neodymium magnets are the strongest and most permanent magnets known to man. If they are not overheated or physically damaged, neodymium magnets will lose less than 1% of their strength over 10 years - not enough for you to notice unless you have very sensitive measuring equipment.
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There are two types of rare earth magnet materials - Neodymium (Nd-Fe-B) and Samarium Cobalt (SmCo). Both materials come in different grades (strengths) and have different magnetic and physical properties. Neodymium magnets, the stronger of the two, are composed of alloys primarily of neodymium, iron, and boron.
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Iron, cobalt, and nickel are the only three naturally occurring elements that are magnetic. These are the elements that magnets are made from. Iron magnets tend to lose their magnetic properties over time and with increased temperature.
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['Paramagnetic materials. The materials which are not strongly attracted to a magnet are known as paramagnetic material. ... ', 'Diamagnetic materials. The materials which are repelled by a magnet such as zinc. ... ', 'Ferromagnetic materials. ... ', 'Ferrites.']
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This generally happens in two ways. So-called permanent magnets are constructed from materials made up of magnetic domains, in which atoms have electrons whose spins are aligned with each other. ... The process is very slow, however: a modern samarium-cobalt magnet takes around 700 years to lose half its strength.
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The strongest permanent magnets in the world are neodymium (Nd) magnets, they are made from magnetic material made from an alloy of neodymium, iron and boron to form the Nd2Fe14B structure.
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You should always wear gloves and eye protection when handling strong rare-earth magnets. Elemental boron and the borates are not considered to be toxic, and they do not require special care in handling. ... As with other rare earths, neodymium should be handled with care.
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Hazards. The greater force exerted by rare-earth magnets creates hazards that are not seen with other types of magnet. Magnets larger than a few centimeters are strong enough to cause injuries to body parts pinched between two magnets or a magnet and a metal surface, even causing broken bones.
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Permanent Magnet. A permanent magnet is a magnet that does not lose its magnet field. ... In the case of permanent magnets this field remains over time without weakening. A permanent magnet is a magnet because of the orientation of its domains.
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Due to the fact that these iron electrons and their magnetic fields can be easily aligned with external magnetic field, it is easy for neodymium magnets to attract to them. ... Stainless steel alloys on the other hand do not have this property and cannot be attracted to a magnet.
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['Neodymium. This is used to make powerful magnets used in loudspeakers and computer hard drives to enable them to be smaller and more efficient. ... ', 'Lanthanum. This element is used in camera and telescope lenses. ... ', 'Cerium. ... ', 'Praseodymium. ... ', 'Gadolinium. ... ', 'Yttrium, terbium, europium.']
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Neodymium magnets are brittle – and can easily shatter and break. Neodymium magnets are brittle and will peel, chip, crack or shatter if allowed to slam together, even from just a few inches apart. Despite being made of metal and coated with a shiny nickel-plating, they are not as hard as steel.
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As a rule Neodymium Magnets lose 0.11% of their magnetism for every 1 degree celsius rise in temperature. This small loss is fully recoverable on cooling, providing that the maximum operating temperature is not exceeded.
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Neodymium magnets (and the nickel plating commonly used on their surface) do conduct electricity. Not as well as, say, copper or aluminum, but it's a conductor.
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Neodymium magnets are also described as rare-earth magnets, because neodymium is part of the rare-earth family of elements.
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Neodymium magnets are lighter and smaller than other magnets, making them a perfect choice for earbuds and headphones. ... Neodymium magnets produce a higher sensitivity and substantial sound output using less power to do so.
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You should always wear gloves and eye protection when handling strong rare-earth magnets. Elemental boron and the borates are not considered to be toxic, and they do not require special care in handling. However, some of the more exotic boron hydrogen compounds are definitely toxic and do require care.