| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Nanopowder production by gas-embeded electrical explosion of wire |
| 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 |
a State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Department of Electrical Engineering,Tsinghua University, Beijing 100084, China;
b Department of Physics and Chemistry, College of Science, North China University of Technology, Beijing 100144, China |
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Abstract 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.
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Received: 20 July 2012
Revised: 01 September 2012
Accepted manuscript online:
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PACS:
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52.80.Qj
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(Explosions; exploding wires)
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81.20.-n
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(Methods of materials synthesis and materials processing)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 50677034), the State Key Laboratory of Control and Simulation of Power System and Generation Equipment, China (Grant No. SKLD11M04), and the State Key Laboratory of Electrical Insulation and Power Equipment, China (Grant No. EIPE12201). |
Corresponding Authors:
Zou Xiao-Bing
E-mail: juxb@tsinghua.edu.cn
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Cite this article:
Zou Xiao-Bing (邹晓兵), Mao Zhi-Guo (毛志国), Wang Xin-Xin (王新新), Jiang Wei-Hua (江伟华) Nanopowder production by gas-embeded electrical explosion of wire 2013 Chin. Phys. B 22 045206
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