Table of Contents
ISRN Nanomaterials
Volume 2012 (2012), Article ID 504634, 11 pages
http://dx.doi.org/10.5402/2012/504634
Research Article

Production of Nanopowders of Metal Oxides Using Pulsed Electron Beam in Low Pressure Gas

1Institute of Electrophysics, Ural Branch RAS, 106 Amundsen St., Ekaterinburg 620216, Russia
2Ural Federal University, 19 Mira St., Ekaterinburg 620002, Russia

Received 2 April 2012; Accepted 31 May 2012

Academic Editors: A. M. Ali, Y. Dai, A. Kajbafvala, A. Nasibulin, and A. Pyatenko

Copyright © 2012 S. Yu. Sokovnin and V. G. Il'ves. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The installation for production of metal oxide nanopowders was created. The method involves evaporation of the target by a pulsed-electron beam, condensation of the vapors of the material in a low-pressure gas, and deposition of nanopowders on a cold large-area crystallizer. In a new installation, a higher-power electron gun with a hollow cathode, which ensures the formation of the current pulse of the electron beam with amplitude up to 1 A and a duration of 100 μs, and a crystallizer of a larger diameter (0.3 m) and length (0.5 m), which makes it possible to decrease the agglomeration, were used. The results of the evaporation of targets made of YSZ, C e G d O 𝑥 , Zn-ZnO, Al2O3, and ZnO were presented. Room-temperature ferromagnetism has been observed in YSZ, Zn-ZnO, and Cu(Al)-doped Al2O3. The proposed method makes it possible to obtain nanopowders of oxides with a characteristic particle size of 3–5 nm and agglomerates consisting of them 20–600 nm in size, specific surfaces of up 338 m2/g, productivity of up to 12 g/h, and a specific power consumption ≥112 (W h)/g.