Thursday, August 18, 2011

All Magnets Are Not Created Equal

Neodymium magnets for sale are the absolute strongest earth magnets that are available today. They are composed of iron, neodymium and boron, which form a metal structure that is a permanent and highly durable. This metal structure was invented in the year 1980. Today they are the most affordable as well as the strongest types of rare earth magnets available.


There are certain characteristics that all magnets have and these rare earth magnets are high in these characteristics.


1. Coercivity - these metals have a very high resistance to de-magnetization due to their unique crystal structure. This allows them be used in many different industrial applications.


2. Remanence - this is a measure of the magnetic field strength of a magnet. Neodymium magnets have a magnetic field strength so strong that if smaller sized magnets made of this metal are allowed to snap together you can expect them to break and split.


3. Curie temperature - this is the temperature in which metals can lose their magnetism. Neodymium magnets have a low working temperature and will catch fire if used in applications involving high temperatures.


4. Strength - these magnets are more powerful than any horseshoe magnet that you may find on the market today day. They have, without a doubt, the highest magnetic strength of all magnets.




Neodymium magnets for sale can be purchased in various sizes and shapes however do not be fooled because even the smallest 1" x 1" square neodymium magnet can in theory lift up to 125 pounds. If you purchase these magnets you should be aware they are very powerful and should be handled carefully. The magnetic fields of these magnets can attract each other from more than 12 inches away. Although they are very strong in both magnetic strength and their magnetic field, they are fragile. Many of them come with a nickel plating however if you allow them to snap together as they attract each other you can expect them to break or chip.


In fact, larger magnets of this type can even fracture or break the bones as they are trying to connect to each other. It is advised that you always wear safety goggles and other protective eyewear when handling these types of magnets. In addition, they should be kept away from any devices that use magnetic fields to store information such as laptop computers, floppy disks, VHS tapes and even credit cards.


Neodymium magnets for sale are not advised to be given to children to play with. More importantly, if someone in your household has been fitted with a pacemaker it is vitally important that this type of magnet come nowhere near to that individual. Because of their low operating temperatures these magnets should not be used or heated in any temperature above 180°F. There is also what is known as super magnets that are powerfully large Neodymium magnets. These types of magnets are strong enough to break the bones in the arm or the hand if not handled carefully. They have the potential to be dangerous and should be handled with the utmost care. You will find many websites on the internet that offer these magnets for sale at reasonable prices.

Wednesday, January 12, 2011

Neodymium Rare Earth Magnets

The name of rare earth elements is kind of misleading for these 17 elements on the periodic table.  In the makeup of the Earth's crust they are actually pretty abundant.  The reason that they are considered as rare elements is because they are not found in very concentrated volumes.  Any object that generates a magnetic field is considered as a magnet. A magnet that generates its own consistent and uninterrupted magnetic field is called a permanent magnet.  Rare Earth magnets are one type of permanent magnets and are made from rare earth element alloys.  Rare Earth magnets are the strongest type of permanent magnets and exhibit 1.4 teslas or more.  There are actually two types of rare earth magnets called samarium-cobalt and neodymium.


The strongest type of permanent magnet, the neodymium magnet, is composed of iron, boron, and neodymium alloy.  Since there has been a continuous price decrease over the years they are also the most affordable type of magnet.  Some of the uses of these types of magnets would be in audio speakers, headphones, self-powered torches, computer hard drives, cordless tool motors, electric guitar pickups, roller coasters, building toys for children and many other types of things.  Neodymium Rare Earth Magnet.





Neodymium rare earth magnets are actually very easy to break and are very weak when it comes to oxidation.  Since they are so easily oxidized they are normally coated with either nickel,tin plating, gold, zinc, and epoxy resin.  You can find these types of magnet in many different sizes and shapes for many different uses.  Neodymium Rare Earth Magnet.


Since these types of magnets are so strong there are some dangers in using them.  Some larger neodymium magnets can hurt you if part of your body was in between a magnet and something it is attracted to or between two magnets.  Also, if you had two of these magnets they can come together with amazing speed, enough to send fragments flying around or to break bones.  Neodymium magnets can also be used to erase the hard drives off of computers of to mess up credit cards.  Most people do not think of magnets being dangerous at all but these types of magnets can be very dangerous and should be handled with a lot of care.


Even though they are called rare earth magnets neodymium magnets are commonly used everyday.  These types of magnets are not hard to get and are very strong.  Whatever need you have for a magnet you are sure to find that some type of neodymium magnet will do whatever you need it to.