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Research into Nanoparticles Obtained by Electric Explosion of Conductive Materials

机译:导电材料电爆炸制备纳米颗粒的研究

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摘要

One of the primary nanoparticles production methods is electric explosion of wire (further - EEW) which is known as a physical phenomenon since 1771. Limitation of EEW as a method of nanoparticles production lies in a great dispersion of particle diameters - a spectrum of nano- and micrometric diameters (10~3 and higher differences in diameters are likely). Due to great differences in nanoparticles diameters formed by explosion (in aerosol conditioned by explosion), a continuous separation of nanoparticles from aerosol flows is essential. Dispersion of conductor explosion products is mostly affected by a diameter of wire, density of comparative energy, duration of the energy input. Objective of this research is to investigate the vista of producing nanoparticles by EEW at low voltage and high energy surplus using the wire of an enlarged diameter. Analyses have been made by exploding the iron wire of 60 mm length and 0.31 and 0.45 mm diameter and the copper wire of 0.375 and 0.49 mm diameter. Purity of the wire material was 99.5% of iron and 99.9% of copper. To separate nanoparticles from aerosol a separation device was used which consists of a precipitator and three stages centrifugal cyclone. SEM analysis of Fe nanoparticles using SEM showed the mean diameter of particles about 69 nm (for wire 00.45 mm). Cu nanoparticles was 97 nm in diameter (for wire 00.49 mm). XRD spectra of iron and copper nanoparticles indicated a high oxidation level of Fe and Cu (oxides of different crystollagraphic axes are formed such as Fe_3O_4, Fe_2O_3, CuO, Cu_2O). A moderate quantity of pure Fe and Cu metals (Fe(110), Fe(211), C(l 11), Cu(200)).
机译:纳米粒子的主要生产方法之一是电线的电爆炸(进一步-EEW),自1771年以来就被称为一种物理现象。作为纳米粒子生产方法的EEW的局限在于粒径的巨大分散-纳米级的光谱和微米直径(直径差异可能在10〜3之间或更高)。由于爆炸(在通过爆炸调节的气溶胶中)形成的纳米颗粒直径差异很大,因此必须从气溶胶流中连续分离纳米颗粒。导体爆炸产物的散布主要受电线直径,比较能量的密度以及能量输入的持续时间影响。这项研究的目的是研究使用直径扩大的金属丝在低电压和高能量盈余下通过EEW生产纳米颗粒的前景。通过爆炸直径为60毫米,直径为0.31和0.45毫米的铁丝和直径为0.375和0.49毫米的铜丝,进行了分析。线材的纯度为铁的99.5%和铜的99.9%。为了从气溶胶中分离出纳米颗粒,使用了分离装置,该分离装置由沉淀器和三级离心旋风分离器组成。使用SEM对Fe纳米颗粒的SEM分析显示,颗粒的平均直径约为69 nm(对于导线为00.45 mm)。 Cu纳米颗粒的直径为97nm(对于线为00.49mm)。铁和铜纳米粒子的XRD光谱表明,Fe和Cu的氧化程度很高(形成了不同的晶轴的氧化物,例如Fe_3O_4,Fe_2O_3,CuO,Cu_2O)。适量的纯铁和铜金属(Fe(110),Fe(211),C(11),Cu(200))。

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