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- Title
Low-Temperature Synthesis of Nano-AlN Based on Solid Nitrogen Source by Plasma-Assisted Ball Milling.
- Authors
Zhuoli Yang; Xianbin Hou; Leyang Dai
- Abstract
Plasma-assisted ball milling was carried out on the Al+C3H6N6 system and Al+C4H4N4 system, respectively. The phase structure, functional groups and synthesis mechanism were analyzed by XRD and FT-IR, and the differences in the synthesis process of nano-AlN with different solid nitrogen sources were discussed. The results show that C3H6N6 has a stable triazine ring structure, and its chemical bond is firm and difficult to break, so AlN cannot be synthesized directly by solid-solid reaction at room temperature. However, there are a large number of nitrile groups (-CN) and amino groups (-NH2) in C4H4N4 molecules. Under the combined action of plasma bombardment and mechanical energy activation, C4H4N4 molecules undergo polycondensation and deamination, so that the ball milling tank is filled with a large number of active nitrogen-containing groups such as N=, ≡N, etc. These groups and ball milling activated Al can synthesize nano-AlN at room temperature, with a conversion rate of 92%. SEM, DSC/TG analysis showed that the powder obtained by ball milling was formed by soft agglomeration of many fine primary particles about 50-80 nm. The surface morphology of the powder was loose and porous, and it had strong activity. After annealing at 800°C, the conversion rate of the Al+C4H4N4 system reached 99%.
- Subjects
LOW temperatures; NITROGEN; BALL mills; X-ray diffraction; FOURIER transform infrared spectroscopy
- Publication
Journal of Renewable Materials, 2023, Vol 11, Issue 6, p2941
- ISSN
2164-6325
- Publication type
Article
- DOI
10.32604/jrm.2023.025723