DC thermal arc-plasma preparation of nanometric and stoichiometric spherical magnetite (Fe3O4) powders

被引：59

作者：

Balasubramaniam, C

Khollam, YB

Bannerjee, I

Bakare, PP

Date, SK

Das, AK

Bhoraskar, S ^{[1
]}

机构：

[1] Univ Poona, Dept Phys, Pune 411007, Maharashtra, India

[2] Natl Chem Lab, Pune 411008, Maharashtra, India

[3] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

来源：

MATERIALS LETTERS | 2004年 / 58卷 / 30期

关键词：

magnetite; DC thermal arc-plasma method; Mossbauer spectroscopy;

D O I：

10.1016/j.matlet.2004.09.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The DC thermal arc-plasma route is used successfully for the first time for the preparation of magnetite (Fe3O4) powders. The powder is characterized by X-ray diffraction (XRD), vibrating sample magonetometer (VSM), Mossbauer spectroscopy and transmission electron microscopy (TEM) techniques. The size of particles increases with increasing arc-plasma current. High DC arc-current generates the spherical, stoichiometric Fe3O4 particles with comparable magnetic properties (M(s)similar to88 emu/g). The arc-current and hence the oxidation rate is found to be responsible in controlling the size and stoichiometry of the Fe3O4 particles. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：3958 / 3962

页数：5

共 17 条

[1] Synthesis of nanowires and nanoparticles of cubic aluminium nitride [J].

Balasubramanian, C ;

Godbole, VP ;

Rohatgi, VK ;

Das, AK ;

Bhoraskar, SV .

NANOTECHNOLOGY, 2004, 15 (03) :370-373

[2]

Bate G., 1980, Ferromagnetic materials. A handbook on the properties of magnetically ordered substances, vol.II, P381, DOI 10.1016/S1567-2719(80)02010-0

[3]

Coey J.M.D., 1971, J PHYSIQUE, V32, DOI 10.1051/jphyscol:1971190

[4] Effect of variation of molar ratio (pH) on the crystallization of iron oxide phases in microwave hydrothermal synthesis [J].