Posts Tagged ‘permanent magnetic materials’
Quick Method To Make Magnets
Until now, producing Samarium Cobalt has been a difficult and expensive multi-step process. Northeastern University researchers have broken new ground with an innovative invention of a rapid, high-volume and cost-effective 1 step method in order to produce rare and pure earth permanent magnetic materials.(Samarium Cobalt)
Spontaneous Rotation of a Magnet over a High-Temperature Superconductor
Invented by C.N. Chinnasamy, Ph.D., lead scientist at Northeastern’s Center for Microwave Magnetic Materials and Integrated Circuits, the direct chemical synthesis process is able to produce Samarium Cobalt rapidly and in large amounts, at a small fraction of the cost of the current industry method. Also, the process is environmentally friendly, with 100% recyclable chemicals, and readily scalable to large volume synthesis to meet the needs for the myriad of advanced permanent magnet applications. The study describing the invention is published in the latest issue of Applied Physics Letters (July 28, 2008).
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Superior To Other Magnetic Materials
Samarium Cobalt magnet is superior to other classes of permanent magnetic materials for advanced high-temperature applications and the Northeastern invention goes beyond the currently known fabrication process of these nanostructured magnets. Unlike the traditional multi-step metallurgical techniques that provide limited control of the size and shape of the final magnetic particles, the Northeastern scientists’ 1 step method produces air-stable elongated nanoparticles shaped like blades called “nanoblades” that allow for a more efficient assembly that may ultimately result in smaller and lighter magnets without sacrificing performance.
“Such unusually shaped particles should prove valuable in the processing of anisotropic magnets that are highly sought in many DOD and commercial applications and are anticipated to lead to lighter and more energy-efficient end products,” said C.N. Chinnasamy.
Revolutionary Invention
This revolutionary invention is anticipated to not only revitalize the permanent magnet industry, it has the potential to bring major changes to several federal and commercial industries, including its potential to impact the size, weight, and performance of aircraft, land-based vehicles and ships, as well as contribute to more efficient emerging biomedical applications and computer technologies.