Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 6, Pages 7223-7227Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.01.043
Keywords
High-energy ball milling; One-dimensional nanostructures; Gallium oxide; Gallium nitride
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Funding
- U.S. Department of Energy [DE-FOA-0000409]
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beta-Gallium oxide (beta-Ga2O3) is a promising material for sensors that can withstand high-temperature, high-pressure, and corrosive environment in advanced fossil fuel power plants. Synthesis of one-dimensional nanostructures of beta-Ga2O3, which are of particular interest, by ball milling of gallium nitride followed by annealing in nitrogen flow is attractive due to relatively inexpensive equipment and simple procedures, but the long milling time is an obstacle for widespread use of this method. In the present work, high-energy mechanical milling of GaN in a planetary ball mill is used for shortening the milling time in the fabrication of one-dimensional Ga2O3 nanostructures. Effects of milling parameters on the morphology of GaN powders as well as on the morphology and chemical composition of the obtained Ga2O3 structures are studied. When annealing was conducted in ultra-high purity (O-2 < 1 ppb) nitrogen flow, a variety of Ga2O3 one-dimensional nanostructures such as rods, belts, sheets, and leaf-like shapes were obtained. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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