UAIPD 10-0024 Dr. Yang-Ki Hong Non-Rare Earth Nanomagnets
UAIPD 10-0024
Dr. Yang-Ki Hong
Non-Rare Earth Nanomagnets
Current Problems• Motor applications require operational temps 160°C
while retaining 9800G in the market• Many permanent magnets are made of rare-earth
metals• Sources for the rare-earth metals are limited to a
few countries• Rare-earth permanent magnets have operational
temperatures above 150°C
• Magnetic exchange coupled core-shell nanomagnets without rare-earth metals – Core-shell nanomagnets (below 20 nanometers in diameter)
to replace rare-earths– Magnetic properties comparable to rare-earths (<20% loss in
magnetic energy) – Less expensive materials than current rare earths
Technology
• Uses no rare-earth materials• Higher Curie temperature than rare-
earth permanent magnets• Invented core-shell nanomagnets can
be used at 250°C
Advantages
• Dr. Yang-Ki Hong– E.A. Larry Drummond Endowed
Chair of Computer Engineering – Professor of Material Sciences Ph. D.
Program – More than 100 referred journal
papers– 13 patents awarded– 8 provisional US patents
• Departments – Center for Materials for Information
Technologies – Electrical and Computer
Engineering
Inventor
Office for Technology Transfer720 2nd Ct E
Tuscaloosa, AL 35401UAIPD [email protected]
www.OTT.UA.edu