Mixed Al+AlN nanoparticles were synthesized by an active plasma-metal reaction method. Mean particle size of the mixed Al+AlN nanoparticles is about 30-50 nm. Defects were found in some AIN particles. Moreover, the AI...Mixed Al+AlN nanoparticles were synthesized by an active plasma-metal reaction method. Mean particle size of the mixed Al+AlN nanoparticles is about 30-50 nm. Defects were found in some AIN particles. Moreover, the AIN ratio and its particle size in mixed Al+AlN nanoparticles obtained in different atmospheres (N-2+Ar) increase with increasing N-2 particle pressure, and the specific surface areas of the mixed Al+AlN nanoparticles increase with the AIN ratio. The surface degradation of the Al+AlN exposed to air is estimated by the infrared absorption spectra.展开更多
Ti-Fe nanoparticles with different concentrations were synthesized by gas condensation method. It is found that the size distribution of single phase nanoparticles obeys log normal distribution, and that of multiple p...Ti-Fe nanoparticles with different concentrations were synthesized by gas condensation method. It is found that the size distribution of single phase nanoparticles obeys log normal distribution, and that of multiple phase nanoparticles is quite different. If it is assumed that the size distribution of each phase in multiple phase nanoparticles obeys log normal distribution as that of single phase particles, the calculated distribution curve is agreeable to the empirical curve. The inferences from the hypothesis are also supported by experimental results.展开更多
Bulk AIN + Al nanocomposite materials were synthesized by sintering the compacts of AIN and Al nanoparticles, which were produced by an active plasma-metal reaction method. The surfaces of as-prepared nanocomposite wa...Bulk AIN + Al nanocomposite materials were synthesized by sintering the compacts of AIN and Al nanoparticles, which were produced by an active plasma-metal reaction method. The surfaces of as-prepared nanocomposite was investigated by X-ray photoelectron spectroscopy (XPS). Results show the surfaces are much degraded and the degradation products are alumina(Al2O3), boehmite(AlOOH), bayerite(AI(OH)(3)) layer. The mechanism of degradation behaviour in moist environment was also discussed.展开更多
文摘Mixed Al+AlN nanoparticles were synthesized by an active plasma-metal reaction method. Mean particle size of the mixed Al+AlN nanoparticles is about 30-50 nm. Defects were found in some AIN particles. Moreover, the AIN ratio and its particle size in mixed Al+AlN nanoparticles obtained in different atmospheres (N-2+Ar) increase with increasing N-2 particle pressure, and the specific surface areas of the mixed Al+AlN nanoparticles increase with the AIN ratio. The surface degradation of the Al+AlN exposed to air is estimated by the infrared absorption spectra.
文摘Ti-Fe nanoparticles with different concentrations were synthesized by gas condensation method. It is found that the size distribution of single phase nanoparticles obeys log normal distribution, and that of multiple phase nanoparticles is quite different. If it is assumed that the size distribution of each phase in multiple phase nanoparticles obeys log normal distribution as that of single phase particles, the calculated distribution curve is agreeable to the empirical curve. The inferences from the hypothesis are also supported by experimental results.
文摘Bulk AIN + Al nanocomposite materials were synthesized by sintering the compacts of AIN and Al nanoparticles, which were produced by an active plasma-metal reaction method. The surfaces of as-prepared nanocomposite was investigated by X-ray photoelectron spectroscopy (XPS). Results show the surfaces are much degraded and the degradation products are alumina(Al2O3), boehmite(AlOOH), bayerite(AI(OH)(3)) layer. The mechanism of degradation behaviour in moist environment was also discussed.
