Direct phase transformation from hematite to maghemite during high energy ball milling

被引：98

作者：

Randrianantoandro, N ^{[1
]}

Mercier, AM

Hervieu, M

Grenèche, JM

机构：

[1] Univ Maine, Fac Sci, Lab Phys Etat Condense, UPRESA CNRS 6087, F-72085 Le Mans 9, France

[2] Univ Maine, Lab Fluorures UPRES A 6010, F-72085 Le Mans, France

[3] Inst Sci Mat & Rayonnement, Lab CRISMAT, F-14050 Caen, France

来源：

MATERIALS LETTERS | 2001年 / 47卷 / 03期

关键词：

mechanical milling; iron oxide nanoparticle; Mossbauer spectrometry;

D O I：

10.1016/S0167-577X(00)00227-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hematite alpha -Fe2O3 powder was milled with a dispersing liquid (ethanol) for different times using a conventional planetary ball mill equipped with a steel vial. Both high resolution transmission electron microscopy (HRTEM), X-ray diffraction and zero- and in-field Mossbauer spectrometry measurements reveal that the nanostructured powders contain maghemite, suggesting that our milling conditions favour the direct transformation from alpha -Fe2O, to gamma -Fe2O3. Both the origin and the kinetics of the transformation are discussed in terms of mechanical aspects. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：150 / 158

页数：9

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