Preparation of Bi-Fe3O4 nanocomposite through reduction of Bi2O3 with Fe via high-energy ball milling

被引：14

作者：

Hasanpour, A.

Mozaffari, M. ^{[1
]}

Amighian, J.

机构：

[1] Isfahan Univ, Fac Sci, Dept Phys, Esfahan 8174673441, Iran

[2] Payame Noor Univ, Fac Sci, Dept Phys, Tehran, Iran

[3] Isfahan Univ, Res Ctr Nanosci & Nanotechnol, Nanophys Res Grp, Esfahan 8174673441, Iran

来源：

PHYSICA B-CONDENSED MATTER | 2007年 / 387卷 / 1-2期

关键词：

nanopowders; powder processing : powder metallurgy; mechanical alloying and granulation; composite materials : electrical conductivity; fabrication of cermets; thermoelectric and thermomagnetic effects;

D O I：

10.1016/j.physb.2006.04.039

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

High-energy ball milling of Bi2O3 and Fe in air and argon atmospheres led to a novel Bi-Fe3O4 nanocomposite. XRD investigation of the as milled powder shows that there are only two phases of Bi and Fe3O4. GTM results show that the reaction is completed after about 2.5 h with no ignition temperature. Mean crystallite sizes of the Bi and Fe3O4 in the composite were 22 and 18 nm, respectively, calculated by Scherrer's formula. The morphology of the as milled powder was also investigated by a TEM. A two-probe method was used to measure resistivity variation of the composite as a function of temperature, by which a percolation temperature of 229 degrees C was obtained. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：298 / 301

页数：4

共 19 条

[1] The effect of Bi mole ratio on phase formation in BixY3-xFe5O12 nanoparticles [J].