All About Rare Earth Magnets
Rare earth magnets are a special type of magnet, first manufactured in the 1970s. They are made from rare earth metals, which are a group of seventeen elements found in the periodic table. These include scandium and yttrium, and despite the name, they are actually found in relative abundance in the earth's crust. Rare earth magnets have the distinction of being the most powerful type of permanent magnet. They are much stronger than the more well known ferrite or alnico magnets. Rare earth magnets can produce a magnetic field that is stronger than 1.4 teslas, while the other types make fields of 1 tesla or less. Rare earth magnets are powerful chiefly because they have what is known as high magnetic anisotropy. High anisotropy means that the crystals within the rare earth metals are easy to magnetize in a specific direction, but hard to magnetize in other directions. These magnets also have high coercivity, which means that they have a strong resistance to losing their magnetic properties. However, they are also very brittle and rust easily. Usually they are covered with some kind of coating or plating to keep them from getting chipped or broken. In addition, if you want to buy rare earth magnets, you need to be aware that they are considerably more expensive than other types of magnets.
The two types of rare earth magnets are samarium-cobalt and neodymium. The sarium-cobalt type was the first to be invented in the 1970s, and is more brittle and weaker than the neodymium type, which was invented about a decade later. The samarium-cobalt type is also more expensive. However, it has the advantage of a higher Curie temperature, which means that it can be used at higher temperatures without losing its magnetism. The neodymium type, made of neodymium, boron, and iron, are much more widely used.
Rare earth magnets have not normally been used as refrigerator magnets or in other ways that consumers typically use alnico and ferrite magnets, because of their cost. They are primarily used industrially, as parts of appliances. One of the most common industrial uses of rare earth magnets is in most computer hard drives. They are also found in speakers and headphones, cordless tools, and mag-lev trains. As prices have come down over the years, more and more consumers buy rare earth magnets for household uses such as finding nails under flooring, erasing video tapes, attaching tarps to cars, or re-magnetizing old alnico magnets that have become demagnetized.
The best way to buy rare earth magnets is to go online and do some patient searching. Use a search engine such as Bing or Google, and start with a search term like "buy magnets" or "magnet prices". Be sure to look at a large number of websites before making any decisions. Verify that the store has a reasonable return policy, and that there are no hidden costs such as shipping and handling costs.
Questions and Answers
Rare earth magnets have their handy home uses as well. For do-it-yourselfers magnets help organize small items that can easily get lost, such as earrings, earring backs, paper clips, screws and nails. If a builder sticks a magnet in his or her pocket, that wrench, screwdriver or other small tool that is never where it needs to be is now helpfully hanging around the crafter's side quite literally.
Rare earth magnets formed from alloys of rare earth elements (lanthanides) and transitional metals like iron, nickel, and cobalt are more stable because their Curie temperatures are far above room temperature. They have the advantage of high magnetic anisotropy, or direction dependence, which means that they magnetize in one direction but not in the opposite direction, retaining high magnetism as long as they are in a solid state.
Rare earth magnets are well known for producing magnetic fields that enhance health and healing. These fields produce negative ions that penetrate a person's body and bloodstream interacting with your body's natural metabolic functions to reduce pain. Consistent use of magnetic jewelry can sustain physical health long term, by bringing a healing touch to chronic aches and pains to help you feel better.
Many people buy rare earth magnets on a whim. The idea of having a very powerful magnet around induces feelings of excitement, especially for people who love science. Once the novelty of these magnets wears off, there are still many practical uses for them. Instead of leaving theme on a shelf to collect dust, consider using them as functional tools.
Generally, custom magnets are among the most valued promotional products available, and no wonder. Every time you look, there's a new use for them. They can be used for so many different things that they are an indispensible part of America today. Many people consider custom magnets to be an outstanding means of promoting their business or organization. Each custom magnet serves as a small billboard, promoting whatever message is printed on it. Obviously, the value of custom magnets a...
In USA, one of the leading brands that offer diverse and high quality products promoting proper hygiene is Difresh USA. If you are looking for the best opportunity to grow and have the opportunity for a new business Difresh USA can help you for they are looking for Exclusive Local Distributors
Getting clean and refresh doesn't sacrifice the place where you are for it should be a habit. Having a healthy body will allow you to do things right and good. And no matter where you are you should practice a healthy and proper hygiene even in little things you do.
Maintaining a healthy and proper hygiene badly needs products that are truly effective and could truly answer our need for this. No matter where we are and at anytime we want to get clean we basically need these products right away and only Difresh USA can supply these in a very easy way
The key reason why some firms thrive while some implode during an financial recession is still a puzzle to many people business-owning business owners. Some wrongly assume that all businesses should suffer via recessionary cycles. But the truth is that some companies are usually essentially recession-proof, and it is not necessarily because they are much larger, better known, or a lot more generously capitalized.
Companies like Arch Coal (ACI) and Massey Energy (MEE) watched his or her stock climbed.
These superior magnetic objects are traditionally called rare earth magnets, a terminology that by now has become a misnomer. The neodymium kind, for example, is widely available and mass produced in many countries of the world. Although the samarium-cobalt variety is far superior, it is not as readily available and hence more expensive to procure. The scientific explanation for the sheer magnetic force of both kinds is their electron charge, which can only be enhanced by their concave form.
Steel balls are used for such a wide range of uses; it is almost difficult to believe. Such apparently unrelated designs as jewelry, electric guitars, autos, historic cannons and spray paint all make use of the same essential components. It is fascination to see the commonality in parts between such different machines, and it is also a testament to the versatility and importance of steel balls.
Ferro fluid is an interesting substance that is used for both practical and fun purposes. Aside from electronics and art, the substance is also a fun classroom tool that helps grade school children learn about magnets. In addition, with the flexibility of this substance, more practical applications for it are bound to be discovered in the future.
Ferrofluid is a stable liquid that contains miniscule magnetic pieces. Iron, magnetite, and cobalt are some of the most common metals. It is vital that these metals are small so they remain in the liquid form when exposed to a magnetic element.
Rare earth magnets are well known for producing magnetic fields that enhance health and healing. These fields produce negative ions that penetrate a person's body and bloodstream interacting with your body's natural metabolic functions to reduce pain. Consistent use of magnetic jewelry can sustain physical health long term, by bringing a healing touch to chronic aches and pains to help you feel better.
Discuss this Article
