Mechanochemical activation of magnetite nanoparticles

2019-11-09 01:26:36

phase milling activation magnetite nanomagnetite

责任者: Sorescu, M. 单位: Dept. of Phys., Duquesne Univ., Pittsburgh, PA, USA 来源出处: Journal of Nanoparticle Research(J. Nanoparticle Res. (Netherlands)),Sept. 2000,2(3):305-8 摘要: Using Mossbauer spectroscopy as a function of ball milling time, it was found that nanomagnetite behaves differently than magnetite during mechanochemical activation. The phase sequence is determined by the original particle size of the powder. Magnetite suffers a phase transformation to hematite, while nanomagnetite (d=19 nm) gives rise to superparamagnetism as an effect of prolonged milling 关键词: iron compounds;magnetic particles;magnetic transitions;Mossbauer effect;nanostructured materials;powder technology;superparamagnetism;mechanochemical activation;magnetite nanoparticles;Mossbauer spectra;ball milling time;nanomagnetite;phase sequence;powder;phase transformation;hematite;superparamagnetism;prolonged milling;Fe3O4