skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Magnetic property and stability of Zn/Sm{sub 2}Fe{sub 17}N{sub x} bonded magnets using the in metal derived from In(C{sub 2}H{sub 5}){sub 3} as a binder

Abstract

Fine powders of Sm{sub 2}Fe{sub 17}N{sub x} were stabilized by microcapsulation with the In and Zn metals produced via photochemical decompositions of In(C{sub 2}H{sub 5}){sub 3} and Zn(C{sub 2}H{sub 5}){sub 2} under UV light irradiation in an organic solvent to avoid any additional oxidation of them. After the coating treatment, they still recorded high remanence (B{sub r} = {approximately}1.30 T) and coercivity (H{sub cj} = {approximately}0.74 MA m{sup {minus}1}) values to provide maximum energy products of (BH){sub max} = {approximately}279 kJ m{sup {minus}3} despite the dilution effect by existence of the nonmagnetic In and/or Zn metals used for the protection. The photochemical decomposition of In(C{sub 2}H{sub 5}){sub 3} was smoothly performed compared with the case of Zn(C{sub 2}H{sub 5}){sub 2}, so that a large amount of In metal was deposited on the surface of Sm{sub 2}Fe{sub 17}N{sub x} fine particles ({approximately}6.5 wt %) to be sufficient for serving as a metal binder for compression-type bonded magnets without any further addition of the same metals with low melting points. The single-layered metal-coated In/Sm{sub 2}Fe{sub 17}N{sub x} and double-layered metal-coated In/Zn/Sm{sub 2}Fe{sub 17}N{sub x} powders produced the corresponding In metal-bonded Sm{sub 2}Fe{sub 17}N{sub x} and Xn/Sm{sub 2}Fe{sub 17}N{sub x} magnets, of whichmore » the latter ones provided the highest (BH){sub max} value of {approximately}144 kJ m{sup {minus}3} among a series of metal-bonded Sm{sub 2}Fe{sub 17}N{sub x} magnets reported to date.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Osaka Univ., Suita (JP)
OSTI Identifier:
20001174
Resource Type:
Journal Article
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 11; Journal Issue: 9; Other Information: PBD: Sep 1999; Journal ID: ISSN 0897-4756
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SAMARIUM NITRIDES; IRON NITRIDES; ZINC; PERMANENT MAGNETS; INDIUM; MAGNETIC PROPERTIES

Citation Formats

Noguchi, Kenji, Nishimura, Masashi, Machida, Kenichi, and Adachi, Ginya. Magnetic property and stability of Zn/Sm{sub 2}Fe{sub 17}N{sub x} bonded magnets using the in metal derived from In(C{sub 2}H{sub 5}){sub 3} as a binder. United States: N. p., 1999. Web. doi:10.1021/cm990234l.
Noguchi, Kenji, Nishimura, Masashi, Machida, Kenichi, & Adachi, Ginya. Magnetic property and stability of Zn/Sm{sub 2}Fe{sub 17}N{sub x} bonded magnets using the in metal derived from In(C{sub 2}H{sub 5}){sub 3} as a binder. United States. doi:10.1021/cm990234l.
Noguchi, Kenji, Nishimura, Masashi, Machida, Kenichi, and Adachi, Ginya. Wed . "Magnetic property and stability of Zn/Sm{sub 2}Fe{sub 17}N{sub x} bonded magnets using the in metal derived from In(C{sub 2}H{sub 5}){sub 3} as a binder". United States. doi:10.1021/cm990234l.
@article{osti_20001174,
title = {Magnetic property and stability of Zn/Sm{sub 2}Fe{sub 17}N{sub x} bonded magnets using the in metal derived from In(C{sub 2}H{sub 5}){sub 3} as a binder},
author = {Noguchi, Kenji and Nishimura, Masashi and Machida, Kenichi and Adachi, Ginya},
abstractNote = {Fine powders of Sm{sub 2}Fe{sub 17}N{sub x} were stabilized by microcapsulation with the In and Zn metals produced via photochemical decompositions of In(C{sub 2}H{sub 5}){sub 3} and Zn(C{sub 2}H{sub 5}){sub 2} under UV light irradiation in an organic solvent to avoid any additional oxidation of them. After the coating treatment, they still recorded high remanence (B{sub r} = {approximately}1.30 T) and coercivity (H{sub cj} = {approximately}0.74 MA m{sup {minus}1}) values to provide maximum energy products of (BH){sub max} = {approximately}279 kJ m{sup {minus}3} despite the dilution effect by existence of the nonmagnetic In and/or Zn metals used for the protection. The photochemical decomposition of In(C{sub 2}H{sub 5}){sub 3} was smoothly performed compared with the case of Zn(C{sub 2}H{sub 5}){sub 2}, so that a large amount of In metal was deposited on the surface of Sm{sub 2}Fe{sub 17}N{sub x} fine particles ({approximately}6.5 wt %) to be sufficient for serving as a metal binder for compression-type bonded magnets without any further addition of the same metals with low melting points. The single-layered metal-coated In/Sm{sub 2}Fe{sub 17}N{sub x} and double-layered metal-coated In/Zn/Sm{sub 2}Fe{sub 17}N{sub x} powders produced the corresponding In metal-bonded Sm{sub 2}Fe{sub 17}N{sub x} and Xn/Sm{sub 2}Fe{sub 17}N{sub x} magnets, of which the latter ones provided the highest (BH){sub max} value of {approximately}144 kJ m{sup {minus}3} among a series of metal-bonded Sm{sub 2}Fe{sub 17}N{sub x} magnets reported to date.},
doi = {10.1021/cm990234l},
journal = {Chemistry of Materials},
issn = {0897-4756},
number = 9,
volume = 11,
place = {United States},
year = {1999},
month = {9}
}