Image

Brushing Up: Rare-earth elements

June 1, 2010
Rare-earth elements are those 30 metals found in the periodic table's oft-omitted center two rows. They're used in many modern applications. Most powerful

Rare-earth elements are those 30 metals found in the periodic table's oft-omitted center two rows. They're used in many modern applications.

Most powerful magnets

Magnets made of rare-earth metals are particularly powerful alloys with crystalline structures that have high magnetic anistropy — which means that they readily align in one direction, and resist it in others. Discovered in the 1940s and first identified and defined by Karl J. Strnat and G. Hoffer in 1966, rare-earth magnets are one-third to two times more powerful than traditional ferrite magnets — generating fields up to 1.4 Teslas in some cases.

High-tech uses

Rare-earth metals are used in rechargable batteries, catalytic converters, guided munitions, LCD and plasma displays, and aerospace superalloys.

Their magnets are used in MRI machines, portable electronic devices, hysteresis clutches, accelerometers, and permanent-magnet rotary and linear motors.

Sponsored Recommendations

Crisis averted: How our AI-powered services helped prevent a factory fire

July 10, 2024
Discover how Schneider Electric's services helped a food and beverage manufacturer avoid a factory fire with AI-powered analytics.

Pumps Push the Boundaries of Low Temperature Technology

June 14, 2024
As an integral part of cryotechnology, KNF pumps facilitate scientific advances in cryostats, allowing them to push temperature boundaries and approach absolute zero.

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.

MONITORING RELAYS — TYPES AND APPLICATIONS

May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!