By continuing your visit to this site, you accept the use of cookies. They ensure the proper functioning of our services and display relevant ads. Learn more about cookies and act

Not yet registered? Create a OverBlog!

Create my blog

The uses of rare earth magnets

Rare earth magnets have many applications ranging from Maglev transport systems to Warhammer figurines. Learn more about magnets and the way in which rare earth metals have revolutionised modern technology.

Background

Names Rare earth magnets are strong and permanent magnets. They are named for the alloys of rare earth elements from which they are made. Despite the name, rare earth elements are in good supply, including the fifteen lanthanoids plus scandium and yttrium. Performance Rare earth magnets have significant performance advantages over regular magnets. Their magnetic field strength is in excess of 1.4 teslas as opposed to the ferrite magnet fields of between 0.5 and 1 tesla. However, they are brittle and susceptible to corrosion, so they are often plated for protection. Magnetisation Like iron, rare earth metals can be magnetised very easily to form a magnet. However, pure rare earth metals only display magnetic properties at very low temperatures. Therefore, they are used to form compound alloys with transition metals. This allows them to maintain their magnetic properties and to form rare earth magnets at higher temperatures. One of the advantages of using rare earth magnets includes their tendency to magnetise only in one direction.

The uses of rare earth magnets

Replace ferrite magnets Due to their stronger magnetic fields, rare earth magnets are increasingly being used to replace conventional ferrite magnets in modern technology. The uses of magnets are diverse, but common applications include computer hard drives and audio speakers. Flashlights and torches Emergency flashlights and torches use these rare earth magnets to function. These products require magnetic fields so as to generate electricity. Linear motors also utilise rare earth magnets as a source of power for inventions such as the Maglev train. Similarly, modern thrill rides and roller coasters also use rare earth magnets for smooth (yet powerful) launch systems. Figure gaming One interesting application for rare earth magnets is in miniature figure gaming. Large brands such as Warhammer, incorporate these powerful magnets into their figures. This allows an easier transition of “ weaponry” between different units. Nuts and screws alternatives Stop Motion Animation has recently begun incorporating these magnets into the process. They provide a practical alternative to traditional nuts and screws. Electric guitar Electric guitar pick-ups utilise rare earth magnets to capture string vibrations and to convert the vibrations into an electric signal. Industries Rare earth magnets are rapidly infiltrating many industries. They provide cheap and effective alternatives to standard ferrite magnets. They can even be purchased from major retailers such as Amazon and eBay, for domestic use.

Same category articles Physics

Understanding the laws of thermodynamics

Understanding the laws of thermodynamics

The laws of thermodynamics primarily govern systems that transfer thermal energy into at least another form of energy, or into work. They represent the absolute fundamental rules which all thermodynamic systems follow when undergoing any energy change.
Where to buy a Digital Blue microscope

Where to buy a Digital Blue microscope

Are you thinking of buying a Digital Blue microscope? Are you wondering where you can find one? If this is the case, you do not have to spend your time searching, visiting retail stores and browsing through magazines and websites. Read the following article and find out all the interesting facts that you need to know about buying a Digital Blue microscope.
How to use an air pressure gauge in a pneumatic system

How to use an air pressure gauge in a pneumatic system

An air pressure gauge is an instrument used for measuring the pressure. It is used in pneumatic systems like air compressors, air cylinders, air supplies and filling systems. It is useful for monitoring and testing pneumatic systems. An air pressure gauge can measure pneumatic and hydraulic pressure of gases, compressed air and low viscosity non-aggressive fluids. This article provides a guide to using an air pressure gauge in a pneumatic system.
How does an atomic absorption spectrophotometer work?

How does an atomic absorption spectrophotometer work?

Atomic absorption spectroscopy sounds complicated, and while, in practice, it is, the basic principles and methods can be easily understood by anyone with a basic understanding of how atoms work. Below is a look at the key principles that an atomic absorption spectrophotometer uses and how they are apllied to analyse a sample.