【摘要】 该文介绍了用高能球磨法制备铁与聚四氟乙烯纳米复合材料,研究预磨聚四氟乙烯的时间对所制备纳米复合材料组分的影响。材料的组分采用穆斯堡尔谱学方法研究分析,穆斯堡尔谱结果表明有界面谱叠加在原来的α-Fe谱上,这说明α-Fe的颗粒已达到纳米级,除此之外还有Fe2+和Fe3+的子谱,分别对应于FeF2和FeF3随着球磨时间的延长,界面谱消失,出现物相Fe3C。实验结果还表明预磨聚四氟乙烯有利于FeF3的产生。更多还原

【Abstract】 Fe/PTFE nanometer compound was prepared by high energy ball milling. Firstly, PTFE was milled for 50h、90h、120h ,then Fe/PTFE mixture was milled for 700h. The components were indentified by 57 Fe Mossbauer spectroscopy. The Mossbauer effect studies show that the spectrum includes not only both sextets of bulk and interface of α-Fe ,it indicates the size of particle Fe is in the order of nanometer, but also one singlet for Fe3+ ,one doublet for Fe2+ ,they corresponds to FeF2 and FeF3 respectively. As milling time increases , the component of interface of α-Fe disappears, meantime, the Fe3C appears. The result shows that it is helpful to produce FeF3 as PTFE was initially milled.更多还原