Magnetic properties of PAN-based carbon fibres modified with magnetite nanoparticles

作者：Wojcik M; Chmist J; Przewoznik J; Figiel H; Blazewicz S^*

来源：Carbon, 2012, 50(4): 1604-1613.

DOI：10.1016/j.carbon.2011.11.039

The magnetic properties of PAN-based carbon fibres modified with magnetite nanoparticles are presented and analyzed. PAN fibres and PAN-based carbon fibres modified with different amounts of magnetite are characterized by the use of magnetization measurements and Mossbauer spectroscopy techniques. The investigations revealed that magnetite (Fe3O4) decomposed into Fe-x, Fe-gamma and cementite (Fe3C). Precise analysis of the phase%26apos;s contents for different carbon fibres has been carried out in relation to the initial magnetite compound. Analysis of the Mossbauer spectra allowed the determination of the phase contents in fibres with different initial magnetite concentrations. Partial transformation of magnetite into gamma-Fe induces catalytic carbonization and formation of a highly crystalline carbon matrix at 1000 degrees C. The apparent crystallite size in carbon fibres containing 30% magnetite was almost seven times higher than that found in the pure carbon fibres.

• 出版日期2012-4