Phase transformations induced in magnetite by high energy ball milling

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作者：

Duquesne Univ, Pittsburgh, United States ^{[1
]}

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来源：

J Mater Sci Lett | / 13卷 / 1059-1061期

关键词：

Ball milling - Coercive force - Crystal atomic structure - Magnetic hysteresis - Magnetic variables measurement - Magnetization - Mossbauer spectroscopy - Nanostructured materials - Oxidation - Particle size analysis - Phase transitions;

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摘要：

The spectacular changes which take place on magnetite (Fe3O4) during high energy ball milling are studied. It is shown that Fe3O4 undergoes a total phase transformation to α-Fe2O4 when exposed to high energy ball milling. The saturation magnetization decreases: first because of a reduction in particle size and after the onset of phase transformation, due the formation of haematite and supermagnetic particles in the system.

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