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Title: Production method for making rare earth compounds

Abstract

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.

Inventors:
 [1];  [1];  [1];  [1];  [1]
  1. (Ames, IA)
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
871245
Patent Number(s):
5690889
Application Number:
08/605,324
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
production; method; rare; earth; compounds; compound; earth-transition; metal; permanent; magnet; producing; process; step; comprises; carbothermically; reacting; oxide; form; carbide; heating; compound-forming; reactant; transition; optional; boron; carbide-forming; element; refractory; forms; thermodynamically; favorable; whereby; 14; lani; formed; earth oxide; refractory metal; permanent magnet; transition metal; rare earth; earth metal; earth-transition metal; earth compound; process step; metal permanent; forming element; production method; earth compounds; /420/148/423/

Citation Formats

McCallum, R. William, Ellis, Timothy W., Dennis, Kevin W., Hofer, Robert J., and Branagan, Daniel J. Production method for making rare earth compounds. United States: N. p., 1997. Web.
McCallum, R. William, Ellis, Timothy W., Dennis, Kevin W., Hofer, Robert J., & Branagan, Daniel J. Production method for making rare earth compounds. United States.
McCallum, R. William, Ellis, Timothy W., Dennis, Kevin W., Hofer, Robert J., and Branagan, Daniel J. Tue . "Production method for making rare earth compounds". United States. https://www.osti.gov/servlets/purl/871245.
@article{osti_871245,
title = {Production method for making rare earth compounds},
author = {McCallum, R. William and Ellis, Timothy W. and Dennis, Kevin W. and Hofer, Robert J. and Branagan, Daniel J.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {11}
}

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