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Laser-driven synthesis of nanocrystalline alumina powders from gas-phase precursors

TitoloLaser-driven synthesis of nanocrystalline alumina powders from gas-phase precursors
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione1993
AutoriBorsella, E., Botti S., Giorgi R., Martelli S., Turtù S., and Zappa Giovanna
RivistaApplied Physics Letters
Volume63
Paginazione1345 - 1347
Data di pubblicazione1993///
Abstract

Carbon dioxide laser synthesis from gaseous precursors has been successfully applied to produce nanosized Al2O3 particles. Trimethylaluminum [Al(CH3)3] and nitrous-oxide (N 2O) were used as gas phase reactants. Ethylene (C2H 4) was added as sensitizer gas. The as-synthesized powder particles showed considerable carbon contamination and an amorphouslike structure. After thermal treatment at 1200-1400°C, the powder transformed to hexagonal α-Al2O3 with very low carbon contamination, confirmed by x-ray diffraction, x-ray photoelectron spectroscopy, and chemical analysis. The thermally treated powder was composed of spherical single-crystal nanoparticles with a mean size 〈D〉 of 15-20 nm, as determined by x-ray diffraction, electron microscopy, and Brunauer-Emmett-Teller specific surface measurements. The laser synthesized Al2O3 particles are suitable dispersoids for intermetallic alloy technology.

Note

Cited By (since 1996): 27Export Date: 1 September 2010Source: Scopus

URLhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0001192039&partnerID=40&md5=aa8a307b324d2ad6fddaf98abeb6b1c2
Citation Key553