Method for preparing high cure temperature rare earth iron compound magnetic material
Abstract
Insertion of light elements such as H,C, or N in the R.sub.2 Fe.sub.17 (R=rare earth metal) series has been found to modify the magnetic properties of these compounds, which thus become prospective candidates for high performance permanent magnets. The most spectacular changes are increases of the Curie temperature, T.sub.c, of the magnetization, M.sub.s, and of coercivity, H.sub.c, upon interstitial insertion. A preliminary product having a component R--Fe--C,N phase is produced by a chemical route. Rare earth metal and iron amides are synthesized followed by pyrolysis and sintering in an inert or reduced atmosphere, as a result of which, the R--Fe--C,N phases are formed. Fabrication of sintered rare earth iron nitride and carbonitride bulk magnet is impossible via conventional process due to the limitation of nitridation method.
- Inventors:
-
- West Hills, CA
- Oak Park, CA
- Issue Date:
- Research Org.:
- Chemat Technology, Inc. (Northridge, CA)
- OSTI Identifier:
- 874402
- Patent Number(s):
- 6383406
- Assignee:
- Chemat Technology, Inc. (Northrdige, CA)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
- DOE Contract Number:
- FG03-93ER81570
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; preparing; cure; temperature; rare; earth; iron; compound; magnetic; material; insertion; light; elements; hc; rsub2; fesub17; rrare; metal; series; found; modify; properties; compounds; prospective; candidates; performance; permanent; magnets; spectacular; changes; increases; curie; tsubc; magnetization; msubs; coercivity; hsubc; interstitial; preliminary; product; component; r-fe-cn; phase; produced; chemical; route; amides; synthesized; followed; pyrolysis; sintering; inert; reduced; atmosphere; result; phases; formed; fabrication; sintered; nitride; carbonitride; bulk; magnet; impossible; via; conventional; process; due; limitation; nitridation; rare earth; permanent magnet; earth metal; magnetic properties; /148/
Citation Formats
Huang, Yuhong, Wei, Qiang, and Zheng, Haixing. Method for preparing high cure temperature rare earth iron compound magnetic material. United States: N. p., 2002.
Web.
Huang, Yuhong, Wei, Qiang, & Zheng, Haixing. Method for preparing high cure temperature rare earth iron compound magnetic material. United States.
Huang, Yuhong, Wei, Qiang, and Zheng, Haixing. Tue .
"Method for preparing high cure temperature rare earth iron compound magnetic material". United States. https://www.osti.gov/servlets/purl/874402.
@article{osti_874402,
title = {Method for preparing high cure temperature rare earth iron compound magnetic material},
author = {Huang, Yuhong and Wei, Qiang and Zheng, Haixing},
abstractNote = {Insertion of light elements such as H,C, or N in the R.sub.2 Fe.sub.17 (R=rare earth metal) series has been found to modify the magnetic properties of these compounds, which thus become prospective candidates for high performance permanent magnets. The most spectacular changes are increases of the Curie temperature, T.sub.c, of the magnetization, M.sub.s, and of coercivity, H.sub.c, upon interstitial insertion. A preliminary product having a component R--Fe--C,N phase is produced by a chemical route. Rare earth metal and iron amides are synthesized followed by pyrolysis and sintering in an inert or reduced atmosphere, as a result of which, the R--Fe--C,N phases are formed. Fabrication of sintered rare earth iron nitride and carbonitride bulk magnet is impossible via conventional process due to the limitation of nitridation method.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}
Works referenced in this record:
Titan-stickstoff-verbindungen
journal, March 1975
- Bürger, H.; Wiegel, K.; Thewalt, U.
- Journal of Organometallic Chemistry, Vol. 87, Issue 3