The influence of a surfactant on the characteristics of the iron powders obtained by mechanical milling in organic media

被引：39

作者：

Lomayeva, SF ^{[1
]}

Yelsukov, EP ^{[1
]}

Konygin, GN ^{[1
]}

Dorofeev, GA ^{[1
]}

Povstugar, VI ^{[1
]}

Mikhailova, SS ^{[1
]}

Zagainov, AV ^{[1
]}

Maratkanova, AN ^{[1
]}

机构：

[1] RAS, UrB, Inst Tech Phys, Izhevsk 426001, Russia

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 162卷 / 1-3期

关键词：

iron powders; mechanical milling; surfactant; nanocrystalline state; magnetic characteristics;

D O I：

10.1016/S0927-7757(99)00222-8

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：

X-ray diffraction, Mossbauer spectroscopy, Auger spectroscopy and magnetic measurements have been used to investigate the effect of surfactants (oleic acid) on dispersion, structure, phase composition and magnetic behaviour of powders, obtained by milling of iron in a planetary ball mill in liquid hydrocarbon environment (heptane). The presence of a surfactant brings forward the dispersion increase in the powders, the change of the particle shapes and their magnetic characteristics. Namely, after 99 h treatment the 20-fold increase of coercitivity and 2-fold decrease of specific saturation magnetization was observed. The resulting powders have nanocrystalline structure (grain size approximate to 4 nm) and represent supersaturated solid solution of O and C in alpha-Fe with Fe3C as impurities. The concentration of C and O, with heptane (C) and oleic acid (C,O) as their source, increases with milling time. The change of magnetic characteristics has been shown to depend on the content of C and O in the powders. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：279 / 284

页数：6

共 18 条

[1]

CAMPBELL SJ, 1996, MOSSBAUER SPECTROSCO, V2, pCH11

[2]

Heinike G., 1984, TRIBOCHEMISTRY

[3] MOSSBAUER STUDY OF FE-MN CARBIDES (FE1-XMNX)3C AND (FE1.1MN3.9)C2 [J].