Enhancement of Nitridation in Synthesis of Aluminum Nitride Nanosize Powders by Pulsed Wire Discharge

Enhancement of Nitridation in Synthesis of Aluminum Nitride Nanosize Powders by Pulsed Wire Discharge

High-purity AlN nanosize powders were synthesized by pulsed wire discharge (PWD) of Al wires in N gas mixed with NH3. The AlN content in the powders, which was determined by XRD analysis, was increased by increasing the discharge energy. The highest AlN content of 98 wt% was obtained at the discharg...

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Veröffentlicht in:Japanese Journal of Applied Physics 2003, Vol.42 (Part 1, No. 4A), p.1763-1765
Hauptverfasser: Cho, Chuhyun, Kinemuchi, Yoshiaki, Suematsu, Hisayuki, Jiang, Weihua, Yatsui, Kiyoshi
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container_end_page 1765
container_issue Part 1, No. 4A
container_start_page 1763
container_title Japanese Journal of Applied Physics
container_volume 42
creator Cho, Chuhyun
Kinemuchi, Yoshiaki
Suematsu, Hisayuki
Jiang, Weihua
Yatsui, Kiyoshi
description High-purity AlN nanosize powders were synthesized by pulsed wire discharge (PWD) of Al wires in N gas mixed with NH3. The AlN content in the powders, which was determined by XRD analysis, was increased by increasing the discharge energy. The highest AlN content of 98 wt% was obtained at the discharge energy of 360 J, and the average particle size was 30 nm. The increase in the AlN content at higher discharge energy can be explained by the energy deposited in the wire during the ohmic heating process. The number of micrometer-sized Al particles, which might be generated from liquid droplets, decreased by increasing the amount of energy deposited in the wire. The production rate of AlN powder was evaluated to be 46 g/kWh, which was 15 times higher than that obtained by the conventional arc discharge method. 10 refs.
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title Enhancement of Nitridation in Synthesis of Aluminum Nitride Nanosize Powders by Pulsed Wire Discharge
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