中国物理B ›› 2013, Vol. 22 ›› Issue (4): 45206-045206.doi: 10.1088/1674-1056/22/4/045206
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
邹晓兵a, 毛志国b, 王新新a, 江伟华a
Zou Xiao-Bing (邹晓兵)a, Mao Zhi-Guo (毛志国)b, Wang Xin-Xin (王新新)a, Jiang Wei-Hua (江伟华)a
摘要: A small electrical explosion of wire (EEW) setup for nanopowder production is constructed. It consists of a low inductance capacitor bank of 2 μF-4 μF typically charged to 8 kV-30 kV, a triggered gas switch, and a production chamber housing the exploding wire load and ambient gas. With the EEW device, nanosize powders of titanium oxides, titanium nitrides, copper oxides, and zinc oxides are successfully synthesized. The average particle size of synthesized powders under different experimental conditions is in a range of 20 nm-80 nm. The pressure of ambient gas or wire vapor can strongly affect the average particle size. The lower the pressure, the smaller the particle size is. For wire material with relatively high resistivity, such as titanium, whose deposited energy Wd is often less than sublimation energy Ws due to the flashover breakdown along the wire prematurely ending the Joule heating process, the synthesized particle size of titanium oxides or titanium nitrides increases with overheat coefficient k (k =Wd/Ws ) increasing.
中图分类号: (Explosions; exploding wires)