In this study,we investigated electric explosion of iron wire in distilled water with different energy input adjusted by charging voltage.The as-prepared samples were characterized by X-ray diffraction(XRD),scanning e...In this study,we investigated electric explosion of iron wire in distilled water with different energy input adjusted by charging voltage.The as-prepared samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM)and X-ray photoelectron spectroscopy(XPS),showing the presence of iron and multiple iron-based compounds oxides with contents influenced by the experimental conditions.In particular,pure FeO(OH)nanoparticles were obtained using electric explosion of iron wire with energy input of 1125 J at charging voltage of 15 kV.Analysis of discharge current and resistive voltage data indicate that the high energy input induced bystrong plasma discharge at high charging voltage is a key factor to form FeO(OH).This study presents a one-step method to synthesize FeO(OH)nanoparticles using electric explosion of iron wire.展开更多
金属丝电爆炸放电波形研究是分析负载能量耦合效率等特性的基础。为此,采用步进电机驱动金属丝端部向高压平板电极运动,通过高压电场击穿环境气体,将大电流导入金属丝中,完成电爆炸。基于该实验方案,提出了一种金属丝电极向高压电极运...金属丝电爆炸放电波形研究是分析负载能量耦合效率等特性的基础。为此,采用步进电机驱动金属丝端部向高压平板电极运动,通过高压电场击穿环境气体,将大电流导入金属丝中,完成电爆炸。基于该实验方案,提出了一种金属丝电极向高压电极运动过程中、环境气体击穿时,两电极间气隙长度的计算方法。并利用电路模型对氩气中铝电爆炸丝放电电流进行了数值模拟,最后分析了不同实验因素(充电电压、金属丝直径及充气压力)对放电电流波形的影响。结果表明:将计算得到的气隙长度代入电路模型,模拟得到的金属丝放电电流波形与实验测量结果基本相符;当充电电压由20 k V提高到28 k V时,放电电流峰值、上升速度分别增大了约6 k A、10 k A/μs,金属蒸汽击穿时刻提前了近0.4μs;当氩气气压从0.10 MPa提升到0.20 MPa时,金属蒸汽击穿时刻由1.5μs推迟到2.1μs。展开更多
基金This research was supported by National Natural Science Foundation of China(Grant No.11702283).
文摘In this study,we investigated electric explosion of iron wire in distilled water with different energy input adjusted by charging voltage.The as-prepared samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM)and X-ray photoelectron spectroscopy(XPS),showing the presence of iron and multiple iron-based compounds oxides with contents influenced by the experimental conditions.In particular,pure FeO(OH)nanoparticles were obtained using electric explosion of iron wire with energy input of 1125 J at charging voltage of 15 kV.Analysis of discharge current and resistive voltage data indicate that the high energy input induced bystrong plasma discharge at high charging voltage is a key factor to form FeO(OH).This study presents a one-step method to synthesize FeO(OH)nanoparticles using electric explosion of iron wire.
文摘金属丝电爆炸放电波形研究是分析负载能量耦合效率等特性的基础。为此,采用步进电机驱动金属丝端部向高压平板电极运动,通过高压电场击穿环境气体,将大电流导入金属丝中,完成电爆炸。基于该实验方案,提出了一种金属丝电极向高压电极运动过程中、环境气体击穿时,两电极间气隙长度的计算方法。并利用电路模型对氩气中铝电爆炸丝放电电流进行了数值模拟,最后分析了不同实验因素(充电电压、金属丝直径及充气压力)对放电电流波形的影响。结果表明:将计算得到的气隙长度代入电路模型,模拟得到的金属丝放电电流波形与实验测量结果基本相符;当充电电压由20 k V提高到28 k V时,放电电流峰值、上升速度分别增大了约6 k A、10 k A/μs,金属蒸汽击穿时刻提前了近0.4μs;当氩气气压从0.10 MPa提升到0.20 MPa时,金属蒸汽击穿时刻由1.5μs推迟到2.1μs。
