Tailoring the properties of Fe-Fe3C nanocrystalline particles prepared by sonochemistry

被引：33

作者：

Nikitenko, SI

Koltypin, Y

Felner, L

Yeshurun, I

Shames, AI

Jiang, JZ

Markovich, V

Gorodetsky, G

Gedanken, A ^{[1
]}

机构：

[1] Bar Ilan Univ, IL-52900 Ramat Gan, Israel

[2] Russian Acad Sci, Inst Phys Chem, Moscow 117915, Russia

[3] Ben Gurion Univ Negev, IL-84105 Beer Sheva, Israel

[4] Hebrew Univ Jerusalem, Inst Phys, IL-91905 Jerusalem, Israel

[5] Tech Univ Denmark, Dept Phys, DK-280 Lyngby, Denmark

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2004年 / 108卷 / 23期

关键词：

D O I：

10.1021/jp036376r

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Air-stable Fe/Fe3C nanocrystalline particles have been prepared by sonicating Fe(CO)(5) in diphenylmethane solutions under argon and subsequently annealing the amorphous as-prepared product in an inert atmosphere. Changing the sonication conditions and annealing temperature allows control of the size of the particles, as well as their composition and magnetic properties. Material obtained under appropriate conditions possesses a high saturation magnetization close to that of bulk iron (M-s/M-o= 0.97-1.06) and good, soft magnetic properties (H-C = 0.50-0.05 A m(-1)). Nanocrystalline particles have a core-shell structure where a coating of Fe3C and carbon protects the body-centered cubic Fe in the core from oxidation.

引用

页码：7620 / 7626

页数：7