乙醇中锆丝电爆炸法制备碳包覆ZrC纳米颗粒（英文）

Fabrication of Carbon Encapsulated ZrC Nanoparticles by Electrical Explosion of Zr Wire in Ethanol

采用在有机液体中进行金属丝电爆炸的方法制备了碳包覆纳米颗粒。以无水乙醇为介质,对高纯度锆丝施加高压脉冲电流,锆丝在高密度电流下迅速熔化、气化、膨胀并爆炸,伴随着高温、高压下乙醇中碳的析出和碳与锆反应及包覆过程,制备出碳包覆ZrC纳米粉体颗粒。对电爆炸过程中的能量、电流、电压对产物的影响进行了分析,通过XRD、TEM、HRTEM等分析了产物特征。结果表明:产物为球状碳包覆碳化锆纳米颗粒,粒径分布在10~150 nm之间;在4、8、12 kV电压下,产物平均粒径分别为24.9、41.1、43.9 nm。最后,对碳包覆ZrC纳米颗粒的形成机理进行了初步的探讨。

The method of electrical explosion of metal wire in organic liquid was adopted to prepare carbon encapsulated nanoparticles. In the medium of absolute ethyl alcohol, under the high-voltage pulse current（HVPC）, the high purity zirconium wire became fusion, gasification, expansion and explosion, accompanied with separating of carbon out of ethanol and reaction of carbon and zirconium, and carbon encapsulated ZrC nanoparticles formed. The energy, voltage and current in the experiments were measured to analyze the influence of them on the products. The products were analyzed by X-ray diffraction technique（XRD）, transmission electron microscopy（TEM） and high resolution transmission electron microscopy（HRTEM）. The results show that the carbon encapsulated Zr C nanoparticles are fabricated successfully. The diameter range is between 10~150 nm. For the voltage of 4, 8 and 12 kV, the average size of the products is 24.9, 41.4 and 43.9 nm, respectively. Finally, the procedure and mechanism of fabrication of the carbon encapsulated ZrC nanoparticles were discussed preliminarily.