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Nanomaterials 2016, 6(3), 38; doi:10.3390/nano6030038

Thermal Plasma Synthesis of Crystalline Gallium Nitride Nanopowder from Gallium Nitrate Hydrate and Melamine

1
Department of Chemistry and Chemical Engineering and Regional Innovation Center for Environmental Technology of Thermal Plasma (RIC-ETTP), Inha University, 100 Inha-ro, Nam-gu, Incheon 22212, Korea
2
Department of Nuclear and Energy Engineering, Jeju National University, 102 Jejudaehak-ro, Jeju 63243, Korea
*
Authors to whom correspondence should be addressed.
Academic Editors: Krasimir Vasilev and Melanie Ramiasa
Received: 30 December 2015 / Revised: 1 February 2016 / Accepted: 10 February 2016 / Published: 24 February 2016
(This article belongs to the Special Issue Plasma Nanoengineering and Nanofabrication)
View Full-Text   |   Download PDF [5144 KB, uploaded 24 February 2016]   |  

Abstract

Gallium nitride (GaN) nanopowder used as a blue fluorescent material was synthesized by using a direct current (DC) non-transferred arc plasma. Gallium nitrate hydrate (Ga(NO3)3xH2O) was used as a raw material and NH3 gas was used as a nitridation source. Additionally, melamine (C3H6N6) powder was injected into the plasma flame to prevent the oxidation of gallium to gallium oxide (Ga2O3). Argon thermal plasma was applied to synthesize GaN nanopowder. The synthesized GaN nanopowder by thermal plasma has low crystallinity and purity. It was improved to relatively high crystallinity and purity by annealing. The crystallinity is enhanced by the thermal treatment and the purity was increased by the elimination of residual C3H6N6. The combined process of thermal plasma and annealing was appropriate for synthesizing crystalline GaN nanopowder. The annealing process after the plasma synthesis of GaN nanopowder eliminated residual contamination and enhanced the crystallinity of GaN nanopowder. As a result, crystalline GaN nanopowder which has an average particle size of 30 nm was synthesized by the combination of thermal plasma treatment and annealing. View Full-Text
Keywords: thermal plasma; annealing; gallium nitride; gallium nitrate hydrate; melamine; nanopowder thermal plasma; annealing; gallium nitride; gallium nitrate hydrate; melamine; nanopowder
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MDPI and ACS Style

Kim, T.-H.; Choi, S.; Park, D.-W. Thermal Plasma Synthesis of Crystalline Gallium Nitride Nanopowder from Gallium Nitrate Hydrate and Melamine. Nanomaterials 2016, 6, 38.

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