CRYSTALLIZATION OF AMORPHOUS NANO-SIZED SILICON POWDERS

Citation
J. Dutta et al., CRYSTALLIZATION OF AMORPHOUS NANO-SIZED SILICON POWDERS, Nanostructured materials, 6(1-4), 1995, pp. 493-496
Citations number
4
Categorie Soggetti
Material Science
Journal title
ISSN journal
09659773
Volume
6
Issue
1-4
Year of publication
1995
Pages
493 - 496
Database
ISI
SICI code
0965-9773(1995)6:1-4<493:COANSP>2.0.ZU;2-7
Abstract
The crystallization phenomena of nano-sized silicon powders (similar t o 20 nm) prepared by Plasma induced reaction of silane were studied us ing in-situ heating in vacuum (<10(-8) Torr) in a high resolution tran smission electron microscope (HRTEM) and ex-situ annealing in forming gas monitored by X-ray diffraction (XRD). In-situ HRTEM measurements s uggest that the primary crystallization process passes through two dis tinct regions: the formation of nano-crystallites which is followed by a sintering step which results in an increase in crystallite sizes. F urther, from XRD spectra we interprete that smaller crystallites form these larger grains which are observed by TEM.