Skip to Content
Find More Like This
Return to Search

Production method for making rare earth compounds

United States Patent

November 25, 1997
View the Complete Patent at the US Patent & Trademark Office
Ames Laboratory - Visit the Iowa State University Research Foundation - Office of Intellectual Property & Technology Transfer Website
A method of making a rare earth compound, such as a earth-transition metal permanent magnet compound, without the need for producing rare earth metal as a process step, comprises carbothermically reacting a rare earth oxide to form a rare earth carbide and heating the rare earth carbide, a compound-forming reactant (e.g. a transition metal and optional boron), and a carbide-forming element (e.g. a refractory metal) that forms a carbide that is more thermodynamically favorable than the rare earth carbide whereby the rare earth compound (e.g. Nd.sub.2 Fe.sub.14 B or LaNi.sub.5) and a carbide of the carbide-forming element are formed.
McCallum; R. William (Ames, IA), Ellis; Timothy W. (Ames, IA), Dennis; Kevin W. (Ames, IA), Hofer; Robert J. (Ames, IA), Branagan; Daniel J. (Ames, IA)
Iowa State University Research Foundation, Inc. (Ames, IA)
08/ 605,324
February 15, 1996
CONTRACTURAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-82 between the Department of Energy and Iowa State University, which contract grants to the Iowas State University Research Foundation, Inc. the right to apply for this patent.